501
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Kim J, de Castro A, Lendoiro E, Cruz-Landeira A, López-Rivadulla M, Concheiro M. Detection of in utero cannabis exposure by umbilical cord analysis. Drug Test Anal 2017; 10:636-643. [DOI: 10.1002/dta.2307] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 09/12/2017] [Accepted: 09/13/2017] [Indexed: 01/15/2023]
Affiliation(s)
- Jiyoung Kim
- Department of Sciences, John Jay College of Criminal Justice; City University of New York; New York NY USA
| | - Ana de Castro
- Sección de Toxicología, Instituto de Ciencias Forenses; Universidad de Santiago de Compostela; Santiago de Compostela Spain
| | - Elena Lendoiro
- Sección de Toxicología, Instituto de Ciencias Forenses; Universidad de Santiago de Compostela; Santiago de Compostela Spain
- School of Pharmacy and Life Sciences; The Robert Gordon University; Aberdeen United Kingdom
| | - Angelines Cruz-Landeira
- Sección de Toxicología, Instituto de Ciencias Forenses; Universidad de Santiago de Compostela; Santiago de Compostela Spain
| | - Manuel López-Rivadulla
- Sección de Toxicología, Instituto de Ciencias Forenses; Universidad de Santiago de Compostela; Santiago de Compostela Spain
| | - Marta Concheiro
- Department of Sciences, John Jay College of Criminal Justice; City University of New York; New York NY USA
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502
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Swortwood MJ, Bartock SH, Scheidweiler KB, Shaw S, Filis P, Douglas A, O’Shaughnessy PJ, Soffientini U, Lucendo-Villarin B, Iredale JP, Hay DC, Fowler PA, Huestis MA. Quantification of ethyl glucuronide, ethyl sulfate, nicotine, and its metabolites in human fetal liver and placenta. Forensic Toxicol 2017. [DOI: 10.1007/s11419-017-0389-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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503
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Development and validation of a sensitive LC–MS/MS method to analyze NBOMes in dried blood spots: evaluation of long-term stability. Forensic Toxicol 2017. [DOI: 10.1007/s11419-017-0391-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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504
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Ustundağ Y, Huysal K. Measurement uncertainty of blood ethanol concentration in drink-driving cases in an emergency laboratory. Biochem Med (Zagreb) 2017; 27:030708. [PMID: 29180916 PMCID: PMC5696754 DOI: 10.11613/bm.2017.030708] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 08/30/2017] [Indexed: 11/13/2022] Open
Abstract
Introduction The quality of blood ethanol concentration (BEC) determination is important because of its legal ramifications. Measurement uncertainty provides quantitative information about the quality and reliability of test results. In this study, we aim to calculate the measurement uncertainty for the ethanol test in our laboratory measured with a Synchron Systems Ethanol assay kit by employing an enzymatic rate method on the Beckman-Coulter Olympus AU400 auto analyzer (Beckman Coulter Inc, Melville, USA). Materials and methods The measurement uncertainty values were calculated in accordance to the Nordtest guidelines. All vehicle drivers involved in a traffic accident were retrospectively inspected for the BEC test conducted during July to December 2016 in our emergency laboratory. Results A 1034 vehicle drivers had their BEC tested. The results for 181 drivers were > 0.50 g/L and reported as positive. The serum ethanol concentration in those showing a positive result was 2.04 ± 1.01 g/L, over four times the legal limit. The median BEC in those showing a negative result was 0.03 (IQR: 0.03) g/L. The expanded uncertainty obtained was 19.74%. When measurement uncertainty values were added to the results of the 1034 drivers who were retrospectively screened, eight vehicle drivers had results with 95% confidence intervals that exceeded the legal limit 0.50 g/L. Conclusions The BEC test results for vehicle drivers with values close to legal limits should be reported as the obtained ethanol concentration with corresponding measurement uncertainty.
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Affiliation(s)
- Yasemin Ustundağ
- Department of Clinical Biochemistry, Bursa Yuksek Ihtisas Faculty, Saglik Bilimleri University, Bursa, Turkey
| | - Kağan Huysal
- Department of Clinical Biochemistry, Bursa Yuksek Ihtisas Faculty, Saglik Bilimleri University, Bursa, Turkey
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505
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Development and validation of a simple, rapid and sensitive LC-MS/MS method for the measurement of urinary neurotransmitters and their metabolites. Anal Bioanal Chem 2017; 409:7191-7199. [DOI: 10.1007/s00216-017-0681-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 09/13/2017] [Accepted: 09/27/2017] [Indexed: 01/07/2023]
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506
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Glicksberg L, Kerrigan S. Stability of Synthetic Cathinones in Blood. J Anal Toxicol 2017; 41:711-719. [DOI: 10.1093/jat/bkx071] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Indexed: 11/13/2022] Open
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507
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Iqbal M, Ezzeldin E, Al-Rashood KA. UPLC–MS/MS assay for identification and quantification of brivaracetam in plasma sample: Application to pharmacokinetic study in rats. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1060:63-70. [DOI: 10.1016/j.jchromb.2017.05.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Revised: 05/29/2017] [Accepted: 05/31/2017] [Indexed: 01/13/2023]
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508
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Desharnais B, Camirand-Lemyre F, Mireault P, Skinner CD. Procedure for the Selection and Validation of a Calibration Model I-Description and Application. J Anal Toxicol 2017; 41:261-268. [PMID: 28137730 DOI: 10.1093/jat/bkx001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Indexed: 11/12/2022] Open
Abstract
Calibration model selection is required for all quantitative methods in toxicology and more broadly in bioanalysis. This typically involves selecting the equation order (quadratic or linear) and weighting factor correctly modelizing the data. A mis-selection of the calibration model will generate lower quality control (QC) accuracy, with an error up to 154%. Unfortunately, simple tools to perform this selection and tests to validate the resulting model are lacking. We present a stepwise, analyst-independent scheme for selection and validation of calibration models. The success rate of this scheme is on average 40% higher than a traditional "fit and check the QCs accuracy" method of selecting the calibration model. Moreover, the process was completely automated through a script (available in Supplemental Data 3) running in RStudio (free, open-source software). The need for weighting was assessed through an F-test using the variances of the upper limit of quantification and lower limit of quantification replicate measurements. When weighting was required, the choice between 1/x and 1/x2 was determined by calculating which option generated the smallest spread of weighted normalized variances. Finally, model order was selected through a partial F-test. The chosen calibration model was validated through Cramer-von Mises or Kolmogorov-Smirnov normality testing of the standardized residuals. Performance of the different tests was assessed using 50 simulated data sets per possible calibration model (e.g., linear-no weight, quadratic-no weight, linear-1/x, etc.). This first of two papers describes the tests, procedures and outcomes of the developed procedure using real LC-MS-MS results for the quantification of cocaine and naltrexone.
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Affiliation(s)
- Brigitte Desharnais
- Department of Toxicology, Laboratoire de sciences judiciaires et de médecine légale, 1701 rue Parthenais, Montréal, Québec, Canada H2K 3S7.,Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke Street West, Montréal, Québec, Canada H4B 1R6
| | - Félix Camirand-Lemyre
- Department of Mathematics, Université de Sherbrooke, 2500 boulevard de l'Université, Sherbrooke, Québec, CanadaJ1K 2R1
| | - Pascal Mireault
- Department of Toxicology, Laboratoire de sciences judiciaires et de médecine légale, 1701 rue Parthenais, Montréal, Québec, CanadaH2K 3S7
| | - Cameron D Skinner
- Department of Chemistry & Biochemistry,Concordia University, 7141 Sherbrooke Street West, Montréal, Québec, CanadaH4B 1R6
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509
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Tiscione NB, Wegner K. Validation of the Neogen® Fentanyl ELISA Kit for Blood and Urine. J Anal Toxicol 2017; 41:313-317. [PMID: 28119436 DOI: 10.1093/jat/bkx005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 01/06/2017] [Indexed: 11/13/2022] Open
Abstract
The Neogen® Fentanyl ready-to-use enzyme-linked immunosorbent assay kit was validated following the Scientific Working Group for Forensic Toxicology Standard Practices for Method Validation in Forensic Toxicology Laboratory Guidelines. Two decision points, 0.5 and 1 ng/mL, were successfully validated for whole blood. For urine, two decision points, 1 and 5 ng/mL, were also successfully validated. The validation included the evaluation of sensitivity, precision, specificity, carryover, plate drift, ruggedness/robustness and a case sample evaluation. The empirically determined limit of detection was 0.25 ng/mL for blood and 0.5 ng/mL for urine. Precision was determined at five different concentrations ranging from 0.25 to 1.5 ng/mL with 15 replicates at each level for whole blood and demonstrated a <2.4% coefficient of variation (CV). In urine, the CV was <5.6% at six different concentrations from 0.5 to 7.5 ng/mL with 15 replicates at each level. Cross-reactivity was evaluated for norfentanyl, acetyl fentanyl, 4-anilino-N-phenethylpiperidine, beta-hydroxythiofentanyl, butyryl fentanyl and furanyl fentanyl.
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Affiliation(s)
- Nicholas B Tiscione
- Toxicology Unit Palm Beach County Sheriff's Office, 3228 Gun Club Road, West Palm Beach, FL 33406, USA
| | - Kristin Wegner
- Department of Pathology and Laboratory Medicine, University of Miami Miller School of Medicine, Rosenstiel Medical Science Building (RMSB), 1600 NW 10th Avenue, 7th Floor Suite 7020 (R-5), Miami, FL 33136, USA
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510
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Andrenyak DM, Moody DE, Slawson MH, O'Leary DS, Haney M. Determination of ∆-9-Tetrahydrocannabinol (THC), 11-hydroxy-THC, 11-nor-9-carboxy-THC and Cannabidiol in Human Plasma using Gas Chromatography-Tandem Mass Spectrometry. J Anal Toxicol 2017; 41:277-288. [PMID: 28069869 DOI: 10.1093/jat/bkw136] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 12/12/2016] [Indexed: 11/12/2022] Open
Abstract
Two marijuana compounds of particular medical interest are delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD). A gas chromatography-tandem mass spectrometry (GC-MS-MS) method was developed to test for CBD, THC, hydroxy-THC (OH-THC) and carboxy-THC (COOH-THC) in human plasma. Calibrators (THC and OH-THC, 0.1 to 100; CBD, 0.25 to 100; COOH-THC, 0.5-500 ng/mL) and controls (0.3, 5 and 80 ng/mL, except COOH-THC at 1.5, 25 and 400 ng/mL) were prepared in blank matrix. Deuterated (d3) internal standards were added to 1-mL samples. Preparation involved acetonitrile precipitation, liquid-liquid extraction (hexane:ethyl acetate, 9:1), and MSTFA derivatization. An Agilent 7890 A GC was interfaced with an Agilent 7000 MS Triple Quadrupole. Selected reaction monitoring was employed. Blood samples were provided from a marijuana smoking study (two participants) and a CBD ingestion study (eight participants). Three analytes with the same transitions (THC, OH-THC and COOH-THC) were chromatographically separated. Matrix selectivity studies showed endogenous chromatographic peak area ratios (PAR) at the analyte retention times were <20% of the analyte limit of quantitation PAR. The intra-assay accuracy ranged from 83.5% to 118% of target and the intra-run imprecision ranged from 2.0% to 19.1%. The inter-assay accuracy ranged from 90.3% to 104% of target and the inter-run imprecision ranged from 6.5% to 12.0%. Stability was established for 25 hours at room temperature, 207 days at -20°C, after three freeze-thaw cycles and for 26 days for rederivatized processed samples. After smoking marijuana predictable concentrations of THC, OH-THC and COOH-THC were seen; low concentrations of CBD were detected at early time points. In moderate users who had not smoked for at least 9 hours before ingesting an 800 mg oral dose of CBD, the method was sensitive enough to follow residual concentrations of THC and OH-THC; sustained COOH-THC concentrations over 50 ng/mL validated its higher analytical range.
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Affiliation(s)
- David M Andrenyak
- Center for Human Toxicology, Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, UT, USA
| | - David E Moody
- Center for Human Toxicology, Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, UT, USA
| | - Matthew H Slawson
- Center for Human Toxicology, Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, UT, USA
| | - Daniel S O'Leary
- Department of Psychiatry, University of Iowa Carver College of Medicine, Iowa City, IA, USA
| | - Margaret Haney
- Department of Psychiatry, Columbia UniversityMedical Center, New York City, NY, USA
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511
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Saenz SR, Lewis RJ, Angier MK, Wagner JR. Postmortem Fluid and Tissue Concentrations of THC, 11-OH-THC and THC-COOH†. J Anal Toxicol 2017; 41:508-516. [DOI: 10.1093/jat/bkx033] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Indexed: 11/15/2022] Open
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512
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Application of a Urine and Hair Validated LC–MS-MS Method to Determine the Effect of Hair Color on the Incorporation of 25B-NBOMe, 25C-NBOMe and 25I-NBOMe into Hair in the Rat. J Anal Toxicol 2017; 41:559-565. [DOI: 10.1093/jat/bkx053] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Indexed: 11/14/2022] Open
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513
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Sofalvi S, Schueler HE, Lavins ES, Kaspar CK, Brooker IT, Mazzola CD, Dolinak D, Gilson TP, Perch S. An LC–MS-MS Method for the Analysis of Carfentanil, 3-Methylfentanyl, 2-Furanyl Fentanyl, Acetyl Fentanyl, Fentanyl and Norfentanyl in Postmortem and Impaired-Driving Cases. J Anal Toxicol 2017; 41:473-483. [DOI: 10.1093/jat/bkx052] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 06/23/2017] [Indexed: 01/13/2023] Open
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514
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Stability of synthetic cathinones in oral fluid samples. Forensic Sci Int 2017; 274:13-21. [DOI: 10.1016/j.forsciint.2016.11.034] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 11/16/2016] [Accepted: 11/22/2016] [Indexed: 11/21/2022]
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515
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Determination of cocaine and its derivatives in hair samples by liquid phase microextraction (LPME) and gas chromatography–mass spectrometry (GC–MS). Forensic Sci Int 2017; 274:83-90. [DOI: 10.1016/j.forsciint.2016.12.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 11/29/2016] [Accepted: 12/17/2016] [Indexed: 11/22/2022]
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516
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Fiorentin TR, D'Avila FB, Comiran E, Zamboni A, Scherer JN, Pechansky F, Borges PEM, Fröehlich PE, Limberger RP. Simultaneous determination of cocaine/crack and its metabolites in oral fluid, urine and plasma by liquid chromatography-mass spectrometry and its application in drug users. J Pharmacol Toxicol Methods 2017; 86:60-66. [PMID: 28395991 DOI: 10.1016/j.vascn.2017.04.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2016] [Revised: 04/04/2017] [Accepted: 04/06/2017] [Indexed: 11/26/2022]
Abstract
INTRODUCTION A single LC-MS equipment was used to validate three methods for simultaneously analyzing cocaine (COC), benzoylecgonine (BZE), cocaethylene (CE), anhydroecgonine methyl ester (AEME) and anhydroecgonine (AEC) in oral fluid (OF), urine and plasma. METHODS The methods were carried out using a Kinetex HILIC column for polar compounds at 30°C. Mobile phase with isocratic condition of acetonitrile: 13mM ammonium acetate pH 6.0: methanol (55:35:10 v/v/v) at 0.8mL/min flow rate was used. RESULTS After buffer dilution (OF) and protein precipitation (urine and plasma), calibration curve ranges were 4.25-544ng/mL for oral fluid and 5-320ng/mL for urine and plasma with correlation coefficients (r) between 0.9947 and 0.9992. The lowest concentration of the calibration curves were the lower limit of quantification. No major matrix effect could be noted, demonstrating the efficiency of the cleaning procedure. DISCUSSION The methods were fully validated and proved to be suitable for analysis of 124 cocaine and/or crack cocaine users. Among the subjects, 56.5% reported daily use of cocaine in the previous three months. Results show a high prevalence of the analytes, with BZE as the most prevalent (94 cases), followed by COC (93 cases), AEC (70 cases), CE (33 cases) and AEME (13 cases). In addition, the concentration of BZE in urine was higher compared to OF and plasma found in the real samples, showing the facility of accumulation in chronic users in matrices with a large detection window.
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Affiliation(s)
- Taís Regina Fiorentin
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul, Av. Ipiranga, 2752, 90610-000 Porto Alegre, RS, Brazil.
| | - Felipe Bianchini D'Avila
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul, Av. Ipiranga, 2752, 90610-000 Porto Alegre, RS, Brazil
| | - Eloisa Comiran
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul, Av. Ipiranga, 2752, 90610-000 Porto Alegre, RS, Brazil
| | - Amanda Zamboni
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul, Av. Ipiranga, 2752, 90610-000 Porto Alegre, RS, Brazil
| | - Juliana Nichterwitz Scherer
- Center for Drug and Alcohol Research, Collaborating Center on Alcohol and Drugs - HCPA/SENAD, Hospital de Clínicas de Porto Alegre, Federal University of Rio Grande do Sul, Rua Professor Álvaro Alvim, 400, 90420-020 Porto Alegre, RS, Brazil
| | - Flavio Pechansky
- Center for Drug and Alcohol Research, Collaborating Center on Alcohol and Drugs - HCPA/SENAD, Hospital de Clínicas de Porto Alegre, Federal University of Rio Grande do Sul, Rua Professor Álvaro Alvim, 400, 90420-020 Porto Alegre, RS, Brazil
| | - Paulo Eduardo Mayorga Borges
- Pharmaceutical Laboratory of the State of Rio Grande do Sul, State Foundation for Production and Research in Health, Av. Ipiranga, 5400, 90610-000 Porto Alegre, Brazil
| | - Pedro Eduardo Fröehlich
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul, Av. Ipiranga, 2752, 90610-000 Porto Alegre, RS, Brazil
| | - Renata Pereira Limberger
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul, Av. Ipiranga, 2752, 90610-000 Porto Alegre, RS, Brazil
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517
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Comments on: Uncertainty of Blood Alcohol Concentration (BAC) Results as Related to Instrumental Conditions: Optimization and Robustness of BAC Analysis Headspace Parameters. Chromatography 2015, 2, 691–708. SEPARATIONS 2017. [DOI: 10.3390/separations4020012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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518
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Sullinger S, Bryand K, Kerrigan S. Identification of Suvorexant in Urine Using Liquid Chromatography-Quadrupole/Time-of-Flight Mass Spectrometry (LC-Q/TOF-MS). J Anal Toxicol 2017; 41:224-229. [PMID: 28035034 DOI: 10.1093/jat/bkw132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Suvorexant (Belsomra®) is a new hypnotic drug with a novel mechanism of action. In prescribed doses of 10 mg before bedtime, the drug produces rapid onset of sleep by inhibiting the orexin neurons of the arousal system, promoting decreased wakefulness. Suvorexant is a potent and highly selective dual orexin receptor antagonist. Sedative hypnotics are of forensic importance due to their widespread use, potential for additive effects with other central nervous system depressants, impairing effects and potential for misuse. In this report we describe a highly sensitive assay for the identification and quantification of suvorexant in urine. Suvorexant was isolated using liquid/liquid extraction (LLE) and identified using liquid chromatography-quadrupole/time-of-flight mass spectrometry. Suvorexant was quantified using a quadratic calibration model between 5 and 250 ng/mL (R2 = 1.000, n = 6). Processed sample stability was demonstrated for up to 24 h. The limit of detection was 0.5 ng/mL and the limit of quantification (LOQ) was 5 ng/mL. The accuracy, bias and precision of the assay at the LOQ were 99% (81-117%), -1% and 12% (n = 18). Intraassay (n = 5) and interassay (n = 15) precision (% CV) at 10, 50 and 200 ng/mL were ≤8%, and bias ranged from -2% to 4% (98-104% accuracy). No qualitative interferences were detected from matrix, internal standard or 50 common drugs. Matrix effects evaluated at low and high concentrations were -16% and -9%, respectively, and produced CVs of 11% and 5% (n = 20). Suvorexant is a new drug of forensic importance. In this report we describe how a simple acidic/neutral LLE can be used to isolate this lipophilic drug with high recoveries and sound analytical performance.
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Affiliation(s)
- Sydney Sullinger
- Department of Forensic Science, Sam Houston State University, Box 2525, 1003 Bowers Blvd., Huntsville, TX 77341, USA
| | - Kelsie Bryand
- Department of Forensic Science, Sam Houston State University, Box 2525, 1003 Bowers Blvd., Huntsville, TX 77341, USA
| | - Sarah Kerrigan
- Department of Forensic Science, Sam Houston State University, Box 2525, 1003 Bowers Blvd., Huntsville, TX 77341, USA
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519
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Wolf CE, Poklis JL, Poklis A. Stability of Tetrahydrocannabinol and Cannabidiol in Prepared Quality Control Medible Brownies. J Anal Toxicol 2017; 41:153-157. [PMID: 27798074 DOI: 10.1093/jat/bkw114] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 08/28/2016] [Indexed: 11/15/2022] Open
Abstract
The legalization of marijuana in the USA for both medicinal and recreational use has increased in the past few years. Currently, 24 states have legalized marijuana for medicinal use. The US Drug Enforcement Administration has classified marijuana as a Schedule I substance. The US Food and Drug Administration does not regulate formulations or packages of marijuana that are currently marketed in states that have legalized marijuana. Marijuana edibles or "medibles" are typically packages of candies and baked goods consumed for medicinal as well as recreational marijuana use. They contain major psychoactive drug in marijuana, delta-9-tetrahydrocannabinol (THC) and/or cannabidiol (CBD), which has reputed medical properties. Presented is a method for the preparation and application of THC and CBD containing brownies used as quality control (QC) material for the analysis of marijuana or cannabinoid baked medibles. The performance parameters of the assay including possible matrix effects and cannabinoid stability in the brownie QC over time are presented. It was determined that the process used to prepare and bake the brownie control material did not degrade the THC or CBD. The brownie matrix was found not to interfere with the analysis of a THC or a CBD. Ten commercially available brownie matrixes were evaluated for potential interferences; none of them were found to interfere with the analysis of THC or CBD. The laboratory baked medible QC material was found to be stable at room temperature for at least 3 months.
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Affiliation(s)
- Carl E Wolf
- Department of Pathology, P.O. Box 980165, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Justin L Poklis
- Department of Pharmacology and Toxicology, P.O. Box 980613, Virginia Commonwealth University, Richmond, VA 23298,, USA
| | - Alphonse Poklis
- Department of Pathology, P.O. Box 980165, Virginia Commonwealth University, Richmond, VA 23298, USA.,Department of Pharmacology and Toxicology, P.O. Box 980613, Virginia Commonwealth University, Richmond, VA 23298,, USA
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520
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Iqbal M, Ezzeldin E, Khalil NY, Al-Rashood STA, Al-Rashood KA. Simple and Highly Sensitive UPLC-ESI-MS/MS Assay for Rapid Determination of Suvorexant in Plasma. J Anal Toxicol 2017; 41:114-120. [PMID: 28376227 DOI: 10.1093/jat/bkw111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2016] [Accepted: 08/28/2016] [Indexed: 11/12/2022] Open
Abstract
Suvorexant is a dual orexin receptor antagonist, recently approved by USFDA for the treatment of insomnia. It is drug-of-abuse and listed in Schedule IV drug of the Controlled Substances Act. In this study, a simple and highly sensitive UPLC-MS/MS assay was developed and fully validated for the determination of suvorexant in rat plasma. Both suvorexant and internal standard (rivaroxaban; IS) were separated on Aquity BEHTM C18 column after the extraction form plasma using diethyl ether as extracting agent. An isocratic mobile phase, consisting of acetonitrile and 10 mM ammonium acetate in composition ratio of 85:15 was eluted at flow rate of 0.3 mL/min. Both suvorexant and IS were eluted within one min with total run time of 1.5 min only. The ionization was performed on electrospray ionization interface in positive mode by multiple reaction monitoring. Precursor to product ion transition of 451.12 > 104.01 for qualifier and 451.12 > 186.04 for quantifier were used for suvorexant whereas 436.10 > 144.93 for IS, respectively. The calibration curves in plasma were linear in the concentration range of 0.33-200 ng/mL (r2 ≥ 0.995) having limit of detection and limit of quantification of 0.10 and 0.33 ng/mL, respectively. All the validation parameters results were found to be within the acceptable limits according to the "Scientific Working Group for Forensic Toxicology (SWGTOX) guidelines" and can be implemented for forensic analysis.
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Affiliation(s)
- Muzaffar Iqbal
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia.,Bioavailability Laboratory, College of Pharmacy, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia
| | - Essam Ezzeldin
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia.,Bioavailability Laboratory, College of Pharmacy, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia
| | - Nasr Y Khalil
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia
| | - Sara T A Al-Rashood
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia
| | - Khalid A Al-Rashood
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia
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521
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Fort C, Jourdan T, Jesse Kemp, Curtis B. Stability of Synthetic Cannabinoids in Biological Specimens: Analysis Through Liquid Chromatography Tandem Mass Spectrometry. J Anal Toxicol 2017; 41:360-366. [DOI: 10.1093/jat/bkx015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Accepted: 02/06/2017] [Indexed: 11/13/2022] Open
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522
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Montesano C, Vannutelli G, Piccirilli V, Sergi M, Compagnone D, Curini R. Application of a rapid μ-SPE clean-up for multiclass quantitative analysis of sixteen new psychoactive substances in whole blood by LC-MS/MS. Talanta 2017; 167:260-267. [PMID: 28340719 DOI: 10.1016/j.talanta.2017.02.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 02/05/2017] [Accepted: 02/07/2017] [Indexed: 01/12/2023]
Abstract
Europe is an important market for illegal drugs, and nowadays a lot of new different psychoactive substances (NPS) are widespread. This work reports the development of a method to determine simultaneously different classes of NPS, as synthetic cannabinoids (SC) and their metabolites, cathinones and phenetylamines, directly on whole blood (WB) without anti-coagulants and using miniaturized solid phase extraction (μ-SPE). In order to demonstrate the feasibility of the method 16 different NPS belonging to the mentioned classes were selected for the analysis. Recoveries ranged from 21% to 70% while matrix effect was lower than 15% for all the analytes. LOQ values were 5ngmL-1 for cathinones and phenetylamines, between 0.25 and 1ngmL-1 for SCs and up to 2.5ngmL-1 for SC metabolites. The performance of μ-SPE was compared with different clean-up strategies (i.e. protein precipitation (PPT), liquid liquid extraction, PPT/SPE hybrid) in term of recovery, matrix effect and suitability for multi-class analysis. The developed method was validated according to SWGTOX guidelines. The validation data demonstrated that this approach is potentially very useful as confirmation method for multiclass analysis in WB and post mortem specimens. In fact only 100μL of human WB are used, sample preparation involves few rapid steps and the method is easily implementable for the determination of other NPS.
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Affiliation(s)
- Camilla Montesano
- Sapienza University of Rome, Department of Chemistry, 00185 Rome, Italy.
| | | | | | - Manuel Sergi
- University of Teramo, Faculty of Bioscience and Technology for Food, Agriculture and Environment, 64100 Teramo, TE, Italy.
| | - Dario Compagnone
- University of Teramo, Faculty of Bioscience and Technology for Food, Agriculture and Environment, 64100 Teramo, TE, Italy
| | - Roberta Curini
- Sapienza University of Rome, Department of Chemistry, 00185 Rome, Italy
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523
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Desharnais B, Camirand-Lemyre F, Mireault P, Skinner CD. Procedure for the Selection and Validation of a Calibration Model II—Theoretical Basis. J Anal Toxicol 2017; 41:269-276. [DOI: 10.1093/jat/bkx002] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Indexed: 11/13/2022] Open
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524
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Jacox A, Wetzel J, Cheng SY, Concheiro M. Quantitative analysis of opioids and cannabinoids in wastewater samples. Forensic Sci Res 2017; 2:18-25. [PMID: 30483615 PMCID: PMC6197101 DOI: 10.1080/20961790.2016.1270812] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 12/08/2016] [Indexed: 12/01/2022] Open
Abstract
Wastewater-based epidemiology is an innovative approach that uses the analysis of human excretion products in wastewater to obtain information about exposure to drugs in defined population groups. We developed and validated an analytical method for the simultaneous determination of opioids (morphine, oxycodone, hydrocodone, oxymorphone and hydromorphone), and cannabinoids (Δ9-tetrahydrocannabinol, 11-nor-9-carboxy-tetrahydrocannabinol (THCCOOH) and THCCOOH-glucuronide) in raw-influent wastewater samples by ultra-high performance liquid chromatography-tandem mass spectrometry. Method validation included linearity (5–1 000 ng/L for opioids, 10–1 000 ng/L for cannabinoids), imprecision (<21.2%), accuracy (83%–131%), matrix effect (from –35.1% to –14.7%) and extraction efficiency (25%–84%), limit of detection (1–5 ng/L) and quantification (5–10 ng/L) and auto-sampler stability (no loss detected). River and wastewater samples were collected in triplicate from different locations in New York City and stored at −20 °C until analysis. Water from sewage overflow location tested positive for morphine (10.7 ng/L), oxycodone (4.2–23.5 ng/L), oxymorphone (4.8 ng/L) and hydromorphone (4.2 ng/L). Raw influent wastewater samples tested positive for morphine (133.0–258.3 ng/L), oxycodone (31.1–63.6 ng/L), oxymorphone (16.0–56.8 ng/L), hydromorphone (6.8–18.0 ng/L), hydrocodone (4.0–12.8 ng/L) and THCCOOH (168.2–772.0 ng/L). This method is sensitive and specific for opioids and marijuana determination in wastewater samples.
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Affiliation(s)
- Alethea Jacox
- Department of Sciences, John Jay College of Criminal Justice, City University of New York, New York, NY, USA
| | - Jillian Wetzel
- Department of Sciences, John Jay College of Criminal Justice, City University of New York, New York, NY, USA
| | - Shu-Yuan Cheng
- Department of Sciences, John Jay College of Criminal Justice, City University of New York, New York, NY, USA
| | - Marta Concheiro
- Department of Sciences, John Jay College of Criminal Justice, City University of New York, New York, NY, USA
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525
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Carson M, Kerrigan S. Quantification of suvorexant in urine using gas chromatography/mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1040:289-294. [DOI: 10.1016/j.jchromb.2016.10.042] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 10/30/2016] [Indexed: 11/29/2022]
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526
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Lee XP, Shouji Y, Kumazawa T, Hasegawa C, Fujishiro M, Sato J, Hasegawa I, Sato K. Rapid and highly sensitive analysis of benzodiazepines and tandospirone in human plasma by automated on-line column-switching UFLC-MS/MS. Leg Med (Tokyo) 2017; 24:36-55. [DOI: 10.1016/j.legalmed.2016.11.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 11/21/2016] [Accepted: 11/26/2016] [Indexed: 11/26/2022]
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527
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Yu H, Canoura J, Guntupalli B, Lou X, Xiao Y. A cooperative-binding split aptamer assay for rapid, specific and ultra-sensitive fluorescence detection of cocaine in saliva. Chem Sci 2017; 8:131-141. [PMID: 28451157 PMCID: PMC5308383 DOI: 10.1039/c6sc01833e] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 07/28/2016] [Indexed: 12/25/2022] Open
Abstract
Sensors employing split aptamers that reassemble in the presence of a target can achieve excellent specificity, but the accompanying reduction of target affinity mitigates any overall gains in sensitivity. We for the first time have developed a split aptamer that achieves enhanced target-binding affinity through cooperative binding. We have generated a split cocaine-binding aptamer that incorporates two binding domains, such that target binding at one domain greatly increases the affinity of the second domain. We experimentally demonstrate that the resulting cooperative-binding split aptamer (CBSA) exhibits higher target binding affinity and is far more responsive in terms of target-induced aptamer assembly compared to the single-domain parent split aptamer (PSA) from which it was derived. We further confirm that the target-binding affinity of our CBSA can be affected by the cooperativity of its binding domains and the intrinsic affinity of its PSA. To the best of our knowledge, CBSA-5335 has the highest cocaine affinity of any split aptamer described to date. The CBSA-based assay also demonstrates excellent performance in target detection in complex samples. Using this CBSA, we achieved specific, ultra-sensitive, one-step fluorescence detection of cocaine within fifteen minutes at concentrations as low as 50 nM in 10% saliva without signal amplification. This limit of detection meets the standards recommended by the European Union's Driving under the Influence of Drugs, Alcohol and Medicines program. Our assay also demonstrates excellent reproducibility of results, confirming that this CBSA-platform represents a robust and sensitive means for cocaine detection in actual clinical samples.
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Affiliation(s)
- Haixiang Yu
- Department of Chemistry and Biochemistry , Florida International University , 11200 SW 8th Street , Miami , FL 33199 , USA .
| | - Juan Canoura
- Department of Chemistry and Biochemistry , Florida International University , 11200 SW 8th Street , Miami , FL 33199 , USA .
| | - Bhargav Guntupalli
- Department of Chemistry and Biochemistry , Florida International University , 11200 SW 8th Street , Miami , FL 33199 , USA .
| | - Xinhui Lou
- Department of Chemistry , Capital Normal University , Xisanhuan North Rd. 105 , Beijing , 100048 , China
| | - Yi Xiao
- Department of Chemistry and Biochemistry , Florida International University , 11200 SW 8th Street , Miami , FL 33199 , USA .
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528
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Rapid analysis of cocaine and metabolites in urine using microextraction in packed sorbent and GC/MS. Anal Bioanal Chem 2016; 409:2051-2063. [PMID: 28012112 DOI: 10.1007/s00216-016-0152-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 11/30/2016] [Accepted: 12/13/2016] [Indexed: 01/09/2023]
Abstract
Cocaine is still one of the most abused drugs worldwide and, as such, it is often screened for in driving-under-the-influence or workplace drug - testing scenarios. A large number of samples have usually to be processed in those situations, and this requires fast and simple extraction procedures for the detection and quantification of the drugs. The present work describes an ultrafast and fully validated procedure for the simultaneous detection and quantification of cocaine and its two main metabolites, ecgonine methyl ester and benzoylecgonine, in urine using microextraction by packed sorbent and GC-MS. A small sample volume (200 μL) was used, and a fast extraction procedure together with a microwave-assisted derivatization (800 W, 2 min) allowed the quantification of all analytes in a range of 25 to 1000 ng/mL (r 2 > 0.99). Inter-day precision revealed coefficients of variation (CVs) lower than 10% for all analytes at the tested concentration levels, with an accuracy within a ±7% interval, with the exception of EME's lowest calibrator (±17%). Intra-day CVs were lower than 15% at the studied concentration levels, with a mean relative error within a ±13% interval. Recoveries ranged from 14.5 to 37.2% (EME), 67.0 to 83.3% (cocaine), and 24.6 to 43.5% (BEG), allowing the limits of detection and quantification to be set at 25 ng/mL for all compounds. Graphical Abstract Schematized analysis of cocaine and metabolites in urine by MEPS- GC/MS.
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529
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Bidny S, Gago K, Chung P, Albertyn D, Pasin D. Simultaneous Screening and Quantification of Basic, Neutral and Acidic Drugs in Blood Using UPLC-QTOF-MS. J Anal Toxicol 2016; 41:181-195. [DOI: 10.1093/jat/bkw118] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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530
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Ferrari A, Licata M, Rustichelli C, Baraldi C, Vandelli D, Marchesi F, Palazzoli F, Verri P, Silingardi E. Monitoring of adherence to headache treatments by means of hair analysis. Eur J Clin Pharmacol 2016; 73:197-203. [PMID: 27866243 PMCID: PMC5226977 DOI: 10.1007/s00228-016-2163-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 11/11/2016] [Indexed: 01/03/2023]
Abstract
Purpose The aim of this study was to evaluate the potential of hair analysis to monitor medication adherence in headache patients undergoing chronic therapy. For this purpose, the following parameters were analyzed: the detection rate of 23 therapeutic drugs in headache patients’ hair, the degree of agreement between the self-reported drug and the drug found in hair, and whether the levels found in hair reflected the drug intake reported by the patients. Methods The study included 93 patients suffering from primary headaches declaring their daily intake of at least one of the following drugs during the 3 months before the hair sampling: alprazolam, amitriptyline, citalopram, clomipramine, clonazepam, delorazepam, diazepam, duloxetine, fluoxetine, flurazepam, levomepromazine, levosulpiride, lorazepam, lormetazepam, mirtazapine, paroxetine, quetiapine, sertraline, topiramate, trazodone, triazolam, venlafaxine, and zolpidem. A detailed pharmacological history and a sample of hair were collected for each patient. Hair samples were analyzed by liquid chromatography-electrospray tandem mass spectrometry, using a previously developed method. Results All 23 drugs were detected in the examined hair samples. The agreement between the self-reported drug and the drug found in hair was excellent for most analytes (P < 0.001, Cohen’s kappa); a statistically significant relationship (P < 0.05, linear regression analysis) between dose and hair level was found for amitriptyline, citalopram, delorazepam, duloxetine, lorazepam, and venlafaxine. Conclusions Hair analysis proved to be a unique matrix to document chronic drug use in headache patients, and the level found for each individual drug can represent a reliable marker of adherence to pharmacological treatments. Electronic supplementary material The online version of this article (doi:10.1007/s00228-016-2163-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Anna Ferrari
- Unit of Medical Toxicology, Headache Centre and Drug Abuse; Department of Diagnostic, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Policlinico, Via del Pozzo, 71, 41124, Modena, Italy.
| | - Manuela Licata
- Forensic Toxicology Laboratory, Department of Diagnostic Medicine, Department of Diagnostic, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Via del Pozzo, 71, 41124, Modena, Italy
| | - Cecilia Rustichelli
- Department of Life Sciences, University of Modena and Reggio Emilia, via G. Campi, 103, 41125, Modena, Italy
| | - Carlo Baraldi
- Unit of Medical Toxicology, Headache Centre and Drug Abuse; Department of Diagnostic, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Policlinico, Via del Pozzo, 71, 41124, Modena, Italy
| | - Daniele Vandelli
- Forensic Toxicology Laboratory, Department of Diagnostic Medicine, Department of Diagnostic, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Via del Pozzo, 71, 41124, Modena, Italy
| | - Filippo Marchesi
- Forensic Toxicology Laboratory, Department of Diagnostic Medicine, Department of Diagnostic, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Via del Pozzo, 71, 41124, Modena, Italy
| | - Federica Palazzoli
- Forensic Toxicology Laboratory, Department of Diagnostic Medicine, Department of Diagnostic, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Via del Pozzo, 71, 41124, Modena, Italy
| | - Patrizia Verri
- Forensic Toxicology Laboratory, Department of Diagnostic Medicine, Department of Diagnostic, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Via del Pozzo, 71, 41124, Modena, Italy
| | - Enrico Silingardi
- Unit of Forensic Medicine, Department of Diagnostic, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Via del Pozzo, 71, 41124, Modena, Italy
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531
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Silveira GDO, Loddi S, de Oliveira CDR, Zucoloto AD, Fruchtengarten LVG, Yonamine M. Headspace solid-phase microextraction and gas chromatography−mass spectrometry for determination of cannabinoids in human breast milk. Forensic Toxicol 2016. [DOI: 10.1007/s11419-016-0346-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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532
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Duvivier WF, van Beek TA, Nielen MWF. Critical comparison of mass analyzers for forensic hair analysis by ambient ionization mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2016; 30:2331-2340. [PMID: 27528453 DOI: 10.1002/rcm.7722] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 06/23/2016] [Accepted: 08/11/2016] [Indexed: 05/05/2023]
Abstract
RATIONALE Recently, several direct and/or ambient mass spectrometry (MS) approaches have been suggested for drugs of abuse imaging in hair. The use of mass spectrometers with insufficient selectivity could result in false-positive measurements due to isobaric interferences. Different mass analyzers have been evaluated regarding their selectivity and sensitivity for the detection of Δ9-tetrahydrocannabinol (THC) from intact hair samples using direct analysis in real time (DART) ionization. METHODS Four different mass analyzers, namely (1) an orbitrap, (2) a quadrupole orbitrap, (3) a triple quadrupole, and (4) a quadrupole time-of-flight (QTOF), were evaluated. Selectivity and sensitivity were assessed by analyzing secondary THC standard dilutions on stainless steel mesh screens and blank hair samples, and by the analysis of authentic cannabis user hair samples. Additionally, separation of isobaric ions by use of travelling wave ion mobility (TWIM) was investigated. RESULTS The use of a triple quadrupole instrument resulted in the highest sensitivity; however, transitions used for multiple reaction monitoring were only found to be specific when using high mass resolution product ion measurements. A mass resolution of at least 30,000 FWHM at m/z 315 was necessary to avoid overlap of THC with isobaric ions originating from the hair matrix. Even though selectivity was enhanced by use of TWIM, the QTOF instrument in resolution mode could not indisputably differentiate THC from endogenous isobaric ions in drug user hair samples. CONCLUSIONS Only the high resolution of the (quadrupole) orbitrap instruments and the QTOF instrument in high-resolution mode distinguished THC in hair samples from endogenous isobaric interferences. As expected, enhanced selectivity compromises sensitivity and THC was only detectable in hair from heavy users. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Wilco F Duvivier
- Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703, HB, Wageningen, The Netherlands.
| | - Teris A van Beek
- Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703, HB, Wageningen, The Netherlands
| | - Michel W F Nielen
- Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703, HB, Wageningen, The Netherlands
- RIKILT Wageningen UR, P.O. Box 230, 6700, AE, Wageningen, The Netherlands
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533
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Oppolzer D, Barroso M, Passarinha L, Gallardo E. Determination of ethyl glucuronide and fatty acid ethyl esters in hair samples. Biomed Chromatogr 2016; 31. [DOI: 10.1002/bmc.3858] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 09/15/2016] [Accepted: 09/27/2016] [Indexed: 12/28/2022]
Affiliation(s)
- David Oppolzer
- Centro de Investigação em Ciências da Saúde (CICS-UBI); Universidade da Beira Interior; Covilhã Portugal
| | - Mário Barroso
- Instituto Nacional de Medicina Legal e Ciências Forenses - Delegação do Sul; Lisbon Portugal
| | - Luís Passarinha
- Centro de Investigação em Ciências da Saúde (CICS-UBI); Universidade da Beira Interior; Covilhã Portugal
- Laboratório de Fármaco-Toxicologia, UBIMedical; Universidade da Beira Interior; Covilhã Portugal
| | - Eugenia Gallardo
- Centro de Investigação em Ciências da Saúde (CICS-UBI); Universidade da Beira Interior; Covilhã Portugal
- Laboratório de Fármaco-Toxicologia, UBIMedical; Universidade da Beira Interior; Covilhã Portugal
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534
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Barreto AS, Brant VF, Spinelli E, Rodrigues SV. Validation of a SPE-LC–MS/MS method for the determination of ketamine and norketamine in micropulverized hair after a single IV dose. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1033-1034:200-209. [DOI: 10.1016/j.jchromb.2016.08.027] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 08/10/2016] [Accepted: 08/16/2016] [Indexed: 11/26/2022]
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535
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Ottaviani G, Cameriere R, Cippitelli M, Froldi R, Tassoni G, Zampi M, Cingolani M. Determination of Drugs of Abuse in a Single Sample of Human Teeth by a Gas Chromatography–Mass Spectrometry Method. J Anal Toxicol 2016; 41:32-36. [DOI: 10.1093/jat/bkw105] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 06/14/2016] [Accepted: 07/03/2016] [Indexed: 11/13/2022] Open
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536
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D'Avila FB, Limberger RP, Fröehlich PE. Cocaine and crack cocaine abuse by pregnant or lactating mothers and analysis of its biomarkers in meconium and breast milk by LC–MS—A review. Clin Biochem 2016; 49:1096-103. [DOI: 10.1016/j.clinbiochem.2016.01.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Revised: 01/24/2016] [Accepted: 01/27/2016] [Indexed: 11/25/2022]
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537
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Hložek T, Bursová M, Coufal P, Čabala R. Gabapentin, Pregabalin and Vigabatrin Quantification in Human Serum by GC-MS After Hexyl Chloroformate Derivatization. J Anal Toxicol 2016; 40:749-753. [PMID: 27590034 DOI: 10.1093/jat/bkw070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 06/09/2016] [Accepted: 06/22/2016] [Indexed: 01/27/2023] Open
Abstract
A simple, sensitive and robust method for simultaneous determination of antiepileptic drugs (gabapentin, pregabalin and vigabatrin) in human serum using GC-MS was developed and validated for clinical toxicology purposes. This method employs an emerging class of derivatization agents - alkyl chloroformates allowing the efficient and rapid derivatization of both the amino and carboxylic groups of the tested antiepileptic drugs within seconds. The derivatization protocol was optimized using the Design of Experiment statistical methodology, and the entire sample preparation requires less than 5 min. Linear calibration curves were obtained in the concentration range from 0.5 to 50.0 mg/L, with adequate accuracy (97.9-109.3%) and precision (<12.1%). The method was successfully applied to quantification of selected γ-aminobutyric acid analogs in the serum of patients in both therapeutic and toxic concentration ranges.
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Affiliation(s)
- Tomáš Hložek
- Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, 121 08 Prague 2, Czech Republic.,Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
| | - Miroslava Bursová
- Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, 121 08 Prague 2, Czech Republic.,Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
| | - Pavel Coufal
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
| | - Radomír Čabala
- Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, 121 08 Prague 2, Czech Republic .,Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
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538
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Coopman V, Blanckaert P, Van Parys G, Van Calenbergh S, Cordonnier J. A case of acute intoxication due to combined use of fentanyl and 3,4-dichloro-N-[2-(dimethylamino)cyclohexyl]-N-methylbenzamide (U-47700). Forensic Sci Int 2016; 266:68-72. [DOI: 10.1016/j.forsciint.2016.05.001] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 04/25/2016] [Accepted: 05/02/2016] [Indexed: 10/21/2022]
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539
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Ocfentanil overdose fatality in the recreational drug scene. Forensic Sci Int 2016; 266:469-473. [DOI: 10.1016/j.forsciint.2016.07.005] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 07/04/2016] [Accepted: 07/05/2016] [Indexed: 11/18/2022]
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540
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Mata DC. Stability of 26 Sedative Hypnotics in Six Toxicological Matrices at Different Storage Conditions. J Anal Toxicol 2016; 40:663-668. [DOI: 10.1093/jat/bkw084] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 07/17/2016] [Indexed: 11/15/2022] Open
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541
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Montesano C, Vannutelli G, Massa M, Simeoni MC, Gregori A, Ripani L, Compagnone D, Curini R, Sergi M. Multi-class analysis of new psychoactive substances and metabolites in hair by pressurized liquid extraction coupled to HPLC-HRMS. Drug Test Anal 2016; 9:798-807. [DOI: 10.1002/dta.2043] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 07/18/2016] [Accepted: 07/18/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Camilla Montesano
- Department of Chemistry; Sapienza University of Rome; 00185 Rome Italy
| | | | - Maristella Massa
- Department of Chemistry; Sapienza University of Rome; 00185 Rome Italy
| | - Maria Chiara Simeoni
- Faculty of Bioscience and Technology for Food, Agriculture and Environment; University of Teramo; 64023 Mosciano Sant'Angelo TE Italy
| | - Adolfo Gregori
- Department of Scientific Investigation (RIS); Carabinieri; 00191 Rome Italy
| | - Luigi Ripani
- Department of Scientific Investigation (RIS); Carabinieri; 00191 Rome Italy
| | - Dario Compagnone
- Faculty of Bioscience and Technology for Food, Agriculture and Environment; University of Teramo; 64023 Mosciano Sant'Angelo TE Italy
| | - Roberta Curini
- Department of Chemistry; Sapienza University of Rome; 00185 Rome Italy
| | - Manuel Sergi
- Faculty of Bioscience and Technology for Food, Agriculture and Environment; University of Teramo; 64023 Mosciano Sant'Angelo TE Italy
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542
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Chun HJ, Poklis JL, Poklis A, Wolf CE. Development and Validation of a Method for Alcohol Analysis in Brain Tissue by Headspace Gas Chromatography with Flame Ionization Detector. J Anal Toxicol 2016; 40:653-658. [PMID: 27488829 DOI: 10.1093/jat/bkw075] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 05/15/2016] [Indexed: 11/12/2022] Open
Abstract
Ethanol is the most widely used and abused drug. While blood is the preferred specimen for analysis, tissue specimens such as brain serve as alternative specimens for alcohol analysis in post-mortem cases where blood is unavailable or contaminated. A method was developed using headspace gas chromatography with flame ionization detection (HS-GC-FID) for the detection and quantification of ethanol, acetone, isopropanol, methanol and n-propanol in brain tissue specimens. Unfixed volatile-free brain tissue specimens were obtained from the Department of Pathology at Virginia Commonwealth University. Calibrators and controls were prepared from 4-fold diluted homogenates of these brain tissue specimens, and were analyzed using t-butanol as the internal standard. The chromatographic separation was performed with a Restek BAC2 column. A linear calibration was generated for all analytes (mean r2 > 0.9992) with the limits of detection and quantification of 100-110 mg/kg. Matrix effect from the brain tissue was determined by comparing the slopes of matrix prepared calibration curves with those of aqueous calibration curves; no significant differences were observed for ethanol, acetone, isopropanol, methanol and n-propanol. The bias and the CVs for all volatile controls were ≤10%. The method was also evaluated for carryover, selectivity, interferences, bench-top stability and freeze-thaw stability. The HS-GC-FID method was determined to be reliable and robust for the analysis of ethanol, acetone, isopropanol, methanol and n-propanol concentrations in brain tissue, effectively expanding the specimen options for post-mortem alcohol analysis.
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Affiliation(s)
- Hao-Jung Chun
- Department of Forensic Science, Virginia Commonwealth University, Richmond, VA 23284, USA
| | - Justin L Poklis
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Alphonse Poklis
- Department of Forensic Science, Virginia Commonwealth University, Richmond, VA 23284, USA Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA 23298, USA Department of Pathology, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Carl E Wolf
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA 23298, USA Department of Pathology, Virginia Commonwealth University, Richmond, VA 23298, USA
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543
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Shu C, Zeng T, Gao S, Xia T, Huang L, Zhang F, Chen W. LC–MS/MS method for simultaneous determination of thalidomide, lenalidomide, cyclophosphamide, bortezomib, dexamethasone and adriamycin in serum of multiple myeloma patients. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1028:111-119. [DOI: 10.1016/j.jchromb.2016.06.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 05/30/2016] [Accepted: 06/06/2016] [Indexed: 12/19/2022]
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544
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Determination of methamphetamine enantiomer composition in human hair by non-chiral liquid chromatography–tandem mass spectrometry method. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1028:145-152. [DOI: 10.1016/j.jchromb.2016.06.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 06/08/2016] [Accepted: 06/09/2016] [Indexed: 11/23/2022]
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545
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Montesano C, Vannutelli G, Gregori A, Ripani L, Compagnone D, Curini R, Sergi M. Broad Screening and Identification of Novel Psychoactive Substances in Plasma by High-Performance Liquid Chromatography-High-Resolution Mass Spectrometry and Post-run Library Matching. J Anal Toxicol 2016; 40:519-28. [PMID: 27466313 DOI: 10.1093/jat/bkw043] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 03/26/2016] [Indexed: 11/13/2022] Open
Abstract
Drug abuse is today a growing global problem. Often the consumers are not aware about the type of substances they are using and the correlated risks. In recent years, new psychoactive substances (NPS) appeared in the illicit market. The presence of NPS, such as synthetic cathinones, cannabinoids and phenethylamines, which are known to be pharmacologically and toxicologically hazardous, has been frequently reported. The aim of this study was the development of a liquid chromatography-high-resolution mass spectrometry (LC-HRMS) method for a broad screening of NPS in plasma. Data acquisition was in MS/MS and full-scan modes and the method was validated for 25 NPS belonging to different chemical classes. Quantitative results have been obtained for these analytes with limits of quantification ranging from 0.03 to 0.4 ng/mL. The method was proven to be suitable for the screening of additional substances; to this aim, a post-run library matching was conducted for every sample with an in-house database containing over 300 NPS and known metabolites. The library may be constantly expanded with new drugs, in order to obtain a broad screening of NPS in biological matrices.
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Affiliation(s)
- Camilla Montesano
- Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Gabriele Vannutelli
- Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Adolfo Gregori
- Department of Scientific Investigation (RIS), Carabinieri, Viale di Tor di Quinto 119, 00191 Rome, Italy
| | - Luigi Ripani
- Department of Scientific Investigation (RIS), Carabinieri, Viale di Tor di Quinto 119, 00191 Rome, Italy
| | - Dario Compagnone
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Via C. Lerici 1, 64023 Mosciano Sant'Angelo, TE, Italy
| | - Roberta Curini
- Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Manuel Sergi
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Via C. Lerici 1, 64023 Mosciano Sant'Angelo, TE, Italy
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546
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Simultaneous quantification of 11 cannabinoids and metabolites in human urine by liquid chromatography tandem mass spectrometry using WAX-S tips. Anal Bioanal Chem 2016; 408:6461-71. [PMID: 27422645 DOI: 10.1007/s00216-016-9765-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 06/23/2016] [Accepted: 07/04/2016] [Indexed: 01/10/2023]
Abstract
A comprehensive cannabinoid urine quantification method may improve clinical and forensic result interpretation and is necessary to support our clinical research. A liquid chromatography tandem mass spectrometry quantification method for ∆(9)-tetrahydrocannabinol (THC), 11-hydroxy-THC (11-OH-THC), 11-nor-9-carboxy-THC (THCCOOH), ∆(9)-tetrahydrocannabinolic acid (THCAA), cannabinol (CBN), cannabidiol (CBD), cannabigerol (CBG), ∆(9)-tetrahydrocannabivarin (THCV), 11-nor-9-carboxy-THCV (THCVCOOH), THC-glucuronide (THC-gluc), and THCCOOH-glucuronide (THCCOOH-gluc) in urine was developed and validated according to the Scientific Working Group on Toxicology guidelines. Sample preparation consisted of disposable pipette extraction (WAX-S) of 200 μL urine. Separation was achieved on a Kinetex C18 column using gradient elution with flow rate 0.5 mL/min, mobile phase A (10 mM ammonium acetate in water), and mobile phase B (15 % methanol in acetonitrile). Total run time was 14 min. Analytes were monitored in both positive and negative ionization modes by scheduled multiple reaction monitoring. Linear ranges were 0.5-100 μg/L for THC and THCCOOH; 0.5-50 μg/L for 11-OH-THC, CBD, CBN, THCAA, and THC-gluc; 1-100 μg/L for CBG, THCV, and THCVCOOH; and 5-500 μg/L for THCCOOH-gluc (R (2) > 0.99). Analytical biases were 88.3-113.7 %, imprecisions 3.3-14.3 %, extraction efficiencies 42.4-81.5 %, and matrix effect -10 to 32.5 %. We developed and validated a comprehensive, simple, and rapid LC-MS/MS cannabinoid urine method for quantification of 11 cannabinoids and metabolites. This method is being used in a controlled cannabis administration study, investigating urine cannabinoid markers documenting recent cannabis use, chronic frequent smoking, or route of drug administration and potentially improving urine cannabinoid result interpretation.
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547
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Licata M, Rustichelli C, Palazzoli F, Ferrari A, Baraldi C, Vandelli D, Verri P, Marchesi F, Silingardi E. Hair testing in clinical setting: Simultaneous determination of 50 psychoactive drugs and metabolites in headache patients by LC tandem MS. J Pharm Biomed Anal 2016; 126:14-25. [DOI: 10.1016/j.jpba.2016.04.015] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 04/12/2016] [Accepted: 04/14/2016] [Indexed: 12/16/2022]
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548
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Simultaneous Determination of Amitraz and its Metabolites in Blood by Support Liquid Extraction Using UPHLC-QTOF. J Anal Toxicol 2016; 40:437-44. [DOI: 10.1093/jat/bkw044] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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549
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Carlier J, Scheidweiler KB, Wohlfarth A, Salmeron BD, Baumann MH, Huestis MA. Quantification of [1-(5-fluoropentyl)-1H-indol-3-yl](naphthalene-1-yl)methanone (AM-2201) and 13 metabolites in human and rat plasma by liquid chromatography-tandem mass spectrometry. J Chromatogr A 2016; 1451:97-106. [PMID: 27208987 PMCID: PMC4886661 DOI: 10.1016/j.chroma.2016.05.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 05/02/2016] [Accepted: 05/04/2016] [Indexed: 11/24/2022]
Abstract
AM-2201 is a popular synthetic cannabinoid first synthesized in 2000. AM-2201 pharmacokinetic and pharmacodynamic data are scarce, requiring further investigation. We developed a sensitive method for quantifying AM-2201 and 13 metabolites in plasma to provide a tool to further metabolic, pharmacokinetic and pharmacodynamic studies. Analysis was performed by liquid chromatography-tandem mass spectrometry. Chromatographic separation was performed by gradient elution on a biphenyl column with 0.1% formic acid in water/0.1% formic acid in acetonitrile:methanol 50:50 (v/v) mobile phase. Sample preparation (75μL) consisted of an enzymatic hydrolysis and a supported liquid extraction. The method was validated with human plasma with a 0.025 or 0.050-50μg/L working range, and cross-validated for rat plasma. Analytical recovery was 88.8-110.1% of target concentration, and intra- (n=30) and inter-day (n=30) imprecision<11.9% coefficient of variation. Method recoveries and matrix effects ranged from 58.4-84.4% and -62.1 to -15.6%, respectively. AM-2201 and metabolites were stable (±20%) at room temperature for 24h, at 4°C for 72h, and after three freeze-thaw cycles, and for 72h in the autosampler after extraction. The method was developed for pharmacodynamic and pharmacokinetic studies with controlled administration in rats but is applicable for pre-clinical and clinical research and forensic investigations. Rat plasma specimen analysis following subcutaneous AM-2201 administration demonstrated the suitability of the method. AM-2201, JWH-018 N-(5-hydroxypentyl), and JWH-018 N-pentanoic acid concentrations were 4.8±1.0, 0.15±0.03, and 0.34±0.07μg/L, respectively, 8h after AM-2201 administration at 0.3mg/kg (n=5).
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Affiliation(s)
- Jeremy Carlier
- Clinical Pharmacology & Therapeutics Research Branch, Chemistry and Drug Metabolism Section, Intramural Research Program, National Institute on Drug Abuse (NIDA), National Institutes of Health (NIH), 251 Bayview Boulevard Suite 200, Baltimore, MD 21224, USA
| | - Karl B Scheidweiler
- Clinical Pharmacology & Therapeutics Research Branch, Chemistry and Drug Metabolism Section, Intramural Research Program, National Institute on Drug Abuse (NIDA), National Institutes of Health (NIH), 251 Bayview Boulevard Suite 200, Baltimore, MD 21224, USA.
| | - Ariane Wohlfarth
- Clinical Pharmacology & Therapeutics Research Branch, Chemistry and Drug Metabolism Section, Intramural Research Program, National Institute on Drug Abuse (NIDA), National Institutes of Health (NIH), 251 Bayview Boulevard Suite 200, Baltimore, MD 21224, USA
| | - Bonita D Salmeron
- Designer Drug Research Unit, Intramural Research Program, National Institute on Drug Abuse (NIDA), National Institutes of Health (NIH), 333 Cassell Drive Suite 4400, Baltimore, MD 21224, USA
| | - Michael H Baumann
- Designer Drug Research Unit, Intramural Research Program, National Institute on Drug Abuse (NIDA), National Institutes of Health (NIH), 333 Cassell Drive Suite 4400, Baltimore, MD 21224, USA
| | - Marilyn A Huestis
- Clinical Pharmacology & Therapeutics Research Branch, Chemistry and Drug Metabolism Section, Intramural Research Program, National Institute on Drug Abuse (NIDA), National Institutes of Health (NIH), 251 Bayview Boulevard Suite 200, Baltimore, MD 21224, USA
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550
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Cocaine and metabolite concentrations in DBS and venous blood after controlled intravenous cocaine administration. Bioanalysis 2016; 7:2041-56. [PMID: 26327184 DOI: 10.4155/bio.15.127] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND DBS are an increasingly common clinical matrix. METHODS & RESULTS Sensitive and specific methods for DBS and venous blood cocaine and metabolite detection by LC-HRMS and 2D GC-MS, respectively, were validated to examine correlation between concentrations following controlled intravenous cocaine administration. Linear ranges from 1 to 200 µg/l were achieved, with acceptable bias and imprecision. Authentic matched specimens' (392 DBS, 97 venous blood) cocaine and benzoylecgonine concentrations were qualitatively similar, but DBS had much greater variability (21.4-105.9 %CV) and were lower than in blood. CONCLUSION DBS offer advantages for monitoring cocaine intake; however, differences between capillary and venous blood and DBS concentration variability must be addressed.
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