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Sartore DM, Vargas Medina DA, Bocelli MD, Jordan-Sinisterra M, Santos-Neto ÁJ, Lanças FM. Modern automated microextraction procedures for bioanalytical, environmental, and food analyses. J Sep Sci 2023; 46:e2300215. [PMID: 37232209 DOI: 10.1002/jssc.202300215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/02/2023] [Accepted: 05/04/2023] [Indexed: 05/27/2023]
Abstract
Sample preparation frequently is considered the most critical stage of the analytical workflow. It affects the analytical throughput and costs; moreover, it is the primary source of error and possible sample contamination. To increase efficiency, productivity, and reliability, while minimizing costs and environmental impacts, miniaturization and automation of sample preparation are necessary. Nowadays, several types of liquid-phase and solid-phase microextractions are available, as well as different automatization strategies. Thus, this review summarizes recent developments in automated microextractions coupled with liquid chromatography, from 2016 to 2022. Therefore, outstanding technologies and their main outcomes, as well as miniaturization and automation of sample preparation, are critically analyzed. Focus is given to main microextraction automation strategies, such as flow techniques, robotic systems, and column-switching approaches, reviewing their applications to the determination of small organic molecules in biological, environmental, and food/beverage samples.
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Affiliation(s)
- Douglas M Sartore
- Departamento de Química e Física Molecular, São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil
| | - Deyber A Vargas Medina
- Departamento de Química e Física Molecular, São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil
| | - Marcio D Bocelli
- Departamento de Química e Física Molecular, São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil
| | - Marcela Jordan-Sinisterra
- Departamento de Química e Física Molecular, São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil
| | - Álvaro J Santos-Neto
- Departamento de Química e Física Molecular, São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil
| | - Fernando M Lanças
- Departamento de Química e Física Molecular, São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil
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Rama A, Govindan I, Hebbar S, Chaturvedi A, Rani U, Naha A. Advancing posaconazole quantification analysis with a new reverse-phase HPLC method in its bulk and marketed dosage form. F1000Res 2023; 12:468. [PMID: 37396051 PMCID: PMC10314186 DOI: 10.12688/f1000research.132841.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/23/2023] [Indexed: 07/04/2023] Open
Abstract
Introduction: Posaconazole is a widely used antifungal drug, and its accurate quantification is essential for quality control and assessment of its pharmaceutical products. This study aimed to develop and validate a reverse-phase high-performance liquid chromatography (HPLC) analytical method for quantifying Posaconazole in bulk and dosage form. Methods: The HPLC method was developed and validated based on International Conference on Harmonisation (ICH) guidelines. The developed method was then applied to quantify Posaconazole in a marketed tablet formulation. The method's specificity, linearity, precision, accuracy, robustness, and stability were evaluated. Results: The developed HPLC method showed good linearity over a 2-20 μg/mL concentration range. The percentage recovery of Posaconazole from the bulk and marketed formulations was found to be 99.01% and 99.05%, respectively. The intra-day and inter-day precisions were less than 1%, and the method was stable under different conditions. The HPLC method was successfully applied to quantify Posaconazole in the marketed formulation. Conclusion: The developed and validated HPLC method is reliable and efficient for analyzing Posaconazole in bulk and dosage forms. The method's accuracy, precision, specificity, linearity, robustness, and stability demonstrate its effectiveness. The method can be used for the quality control and assessment of Posaconazole-containing pharmaceutical products.
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Affiliation(s)
- Annamalai Rama
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Induja Govindan
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Srinivas Hebbar
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Abhishek Chaturvedi
- Division of Biochemistry, Department of Basic Medical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Usha Rani
- Department of Social Health and Innovation, Prasanna School of Public Health, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Anup Naha
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
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Liu H, Yu X, Hu T, Han F, An Z, Zhao R. Simultaneous determination of four antibiotics in human plasma by high-performance LC-MS/MS: application to therapeutic drug monitoring. Bioanalysis 2023; 15:269-282. [PMID: 37083541 DOI: 10.4155/bio-2023-0020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023] Open
Abstract
Background: Aimed to simultaneously measure linezolid, voriconazole, cefoperazone and fluconazole in human plasma suitable for therapeutic drug monitoring applications, a robust, rapid and easy-to-use HPLC-MS/MS approach was developed and validated. Materials & methods: Protein precipitation was used to prepare analytes from 100 μl plasma. HPLC was employed for analyte separation, and quantification was conducted via multiple reaction monitoring in positive ion mode. The methodology was fully validated. Results & conclusion: All four antibiotics were found to be stable under the tested conditions, and accuracy values ranged from 90.96 to 113.25% and CV values were <14.0%. This HPLC-MS/MS method can be used for routine clinical therapeutic drug monitoring of linezolid, voriconazole, cefoperazone and fluconazole simultaneously.
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Affiliation(s)
- Hongchuan Liu
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, 100020, China
| | - Xiaojia Yu
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, 100020, China
| | - Ting Hu
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, 100020, China
| | - Feifei Han
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, 100020, China
| | - Zhuoling An
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, 100020, China
| | - Rui Zhao
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, 100020, China
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Population Pharmacokinetic Model and Optimal Sampling Strategies for Micafungin in Critically Ill Patients Diagnosed with Invasive Candidiasis. Antimicrob Agents Chemother 2022; 66:e0111322. [PMID: 36377940 PMCID: PMC9765295 DOI: 10.1128/aac.01113-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Candida bloodstream infections are associated with high attributable mortality, where early initiation of adequate antifungal therapy is important to increase survival in critically ill patients. The exposure variability of micafungin, a first-line agent used for the treatment of invasive candidiasis, in critically ill patients is significant, potentially resulting in underexposure in a substantial portion of these patients. The objective of this study was to develop a population pharmacokinetic model including appropriate sampling strategies for assessing micafungin drug exposure in critically ill patients to support adequate area under the concentration-time curve (AUC) determination. A two-compartment pharmacokinetic model was developed using data from intensive care unit (ICU) patients (n = 19), with the following parameters: total body clearance (CL), volume of distribution of the central compartment (V1), inter-compartmental clearance (CL12), and volume of distribution of the peripheral compartment (V2). The final model was evaluated with bootstrap analysis and the goodness-of-fit plots for the population and individual predicted micafungin plasma concentrations. Optimal sampling strategies (with sampling every hour, 24 h per day) were developed with 1- and 2-point sampling schemes. Final model parameters (±SD) were: CL = 1.03 (0.37) (L/h/1.85 m2), V1 = 0.17 (0.07) (L/kg LBMc), CL12 = 1.80 (4.07) (L/h/1.85 m2), and V2 = 0.12 (0.06) (L/kg LBMc). Sampling strategies with acceptable accuracy and precision were developed to determine the micafungin AUC. The developed model with optimal sampling procedures provides the opportunity to achieve quick optimization of the micafungin exposure from a single blood sample using Bayesian software and may be helpful in guiding early dose decision-making.
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Kallee S, Scharf C, Schatz LM, Paal M, Vogeser M, Irlbeck M, Zander J, Zoller M, Liebchen U. Systematic Evaluation of Voriconazole Pharmacokinetic Models without Pharmacogenetic Information for Bayesian Forecasting in Critically Ill Patients. Pharmaceutics 2022; 14:pharmaceutics14091920. [PMID: 36145667 PMCID: PMC9505877 DOI: 10.3390/pharmaceutics14091920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/07/2022] [Accepted: 09/07/2022] [Indexed: 11/16/2022] Open
Abstract
Voriconazole (VRC) is used as first line antifungal agent against invasive aspergillosis. Model-based approaches might optimize VRC therapy. This study aimed to investigate the predictive performance of pharmacokinetic models of VRC without pharmacogenetic information for their suitability for model-informed precision dosing. Seven PopPK models were selected from a systematic literature review. A total of 66 measured VRC plasma concentrations from 33 critically ill patients was employed for analysis. The second measurement per patient was used to calculate relative Bias (rBias), mean error (ME), relative root mean squared error (rRMSE) and mean absolute error (MAE) (i) only based on patient characteristics and dosing history (a priori) and (ii) integrating the first measured concentration to predict the second concentration (Bayesian forecasting). The a priori rBias/ME and rRMSE/MAE varied substantially between the models, ranging from −15.4 to 124.6%/−0.70 to 8.01 mg/L and from 89.3 to 139.1%/1.45 to 8.11 mg/L, respectively. The integration of the first TDM sample improved the predictive performance of all models, with the model by Chen (85.0%) showing the best predictive performance (rRMSE: 85.0%; rBias: 4.0%). Our study revealed a certain degree of imprecision for all investigated models, so their sole use is not recommendable. Models with a higher performance would be necessary for clinical use.
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Affiliation(s)
- Simon Kallee
- Department of Anesthesiology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Christina Scharf
- Department of Anesthesiology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Lea Marie Schatz
- Department of Pharmaceutical and Medical Chemistry, Clinical Pharmacy, University of Muenster, 48149 Muenster, Germany
| | - Michael Paal
- Institute of Laboratory Medicine, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Michael Vogeser
- Institute of Laboratory Medicine, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Michael Irlbeck
- Department of Anesthesiology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Johannes Zander
- Laboratory Dr. Brunner, Luisenstr. 7e, 78464 Konstanz, Germany
| | - Michael Zoller
- Department of Anesthesiology, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Uwe Liebchen
- Department of Anesthesiology, University Hospital, LMU Munich, 81377 Munich, Germany
- Correspondence: ; Tel.: +49-89-4400-1681160
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Kably B, Launay M, Derobertmasure A, Lefeuvre S, Dannaoui E, Billaud EM. Antifungal Drugs TDM: Trends and Update. Ther Drug Monit 2022; 44:166-197. [PMID: 34923544 DOI: 10.1097/ftd.0000000000000952] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 12/09/2021] [Indexed: 11/25/2022]
Abstract
PURPOSE The increasing burden of invasive fungal infections results in growing challenges to antifungal (AF) therapeutic drug monitoring (TDM). This review aims to provide an overview of recent advances in AF TDM. METHODS We conducted a PubMed search for articles during 2016-2020 using "TDM" or "pharmacokinetics" or "drug-drug-interaction" with "antifungal," consolidated for each AF. Selection was limited to English language articles with human data on drug exposure. RESULTS More than 1000 articles matched the search terms. We selected 566 publications. The latest findings tend to confirm previous observations in real-life clinical settings. The pharmacokinetic variability related to special populations is not specific but must be considered. AF benefit-to-risk ratio, drug-drug interaction (DDI) profiles, and minimal inhibitory concentrations for pathogens must be known to manage at-risk situations and patients. Itraconazole has replaced ketoconazole in healthy volunteers DDI studies. Physiologically based pharmacokinetic modeling is widely used to assess metabolic azole DDI. AF prophylactic use was studied more for Aspergillus spp. and Mucorales in oncohematology and solid organ transplantation than for Candida (already studied). Emergence of central nervous system infection and severe infections in immunocompetent individuals both merit special attention. TDM is more challenging for azoles than amphotericin B and echinocandins. Fewer TDM requirements exist for fluconazole and isavuconazole (ISZ); however, ISZ is frequently used in clinical situations in which TDM is recommended. Voriconazole remains the most challenging of the AF, with toxicity limiting high-dose treatments. Moreover, alternative treatments (posaconazole tablets, ISZ) are now available. CONCLUSIONS TDM seems to be crucial for curative and/or long-term maintenance treatment in highly variable patients. TDM poses fewer cost issues than the drugs themselves or subsequent treatment issues. The integration of clinical pharmacology into multidisciplinary management is now increasingly seen as a part of patient care.
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Affiliation(s)
- Benjamin Kably
- Laboratoire de Pharmacologie-Toxicologie, Hôpital Européen Georges Pompidou, AP-HP Centre
- Faculté de Médecine, Université de Paris, Paris, France
| | - Manon Launay
- Laboratoire de Pharmacologie-Toxicologie-Gaz du sang, Hôpital Nord-CHU Saint Etienne, Saint-Etienne
| | - Audrey Derobertmasure
- Laboratoire de Pharmacologie-Toxicologie, Hôpital Européen Georges Pompidou, AP-HP Centre
| | - Sandrine Lefeuvre
- Laboratoire de Toxicologie et Pharmacocinétique, CHU de Poitiers, Poitiers; and
| | - Eric Dannaoui
- Faculté de Médecine, Université de Paris, Paris, France
- Unité de Parasitologie-Mycologie, Laboratoire de Microbiologie, Hôpital Européen Georges Pompidou, Paris, France
| | - Eliane M Billaud
- Laboratoire de Pharmacologie-Toxicologie, Hôpital Européen Georges Pompidou, AP-HP Centre
- Faculté de Médecine, Université de Paris, Paris, France
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Interest of high-resolution mass spectrometry in analytical toxicology: Focus on pharmaceuticals. TOXICOLOGIE ANALYTIQUE ET CLINIQUE 2022. [DOI: 10.1016/j.toxac.2021.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tanaka R, Shiraiwa K, Takano K, Ogata M, Honda S, Yoshida N, Okuhiro K, Yoshida M, Narahara K, Kai M, Tatsuta R, Itoh H. High-throughput simultaneousquantification offive azole anti-fungal agents and one active metabolite in human plasma using ultra-high-performance liquid chromatography coupled to tandem mass spectrometry. Clin Biochem 2021; 99:87-96. [PMID: 34715112 DOI: 10.1016/j.clinbiochem.2021.10.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 08/23/2021] [Accepted: 10/24/2021] [Indexed: 11/29/2022]
Abstract
OBJECTIVES For patients with hematological malignancy, triazole antifungal agents such as fluconazole (FLCZ), itraconazole (ITCZ), voriconazole (VRCZ), posaconazole (PSCZ) and isavuconazole (ISCZ) are often used for prophylaxis of deep mycosis. Since these azoles exhibit large pharmacokinetic variability, dose adjustment by therapeutic drug monitoring is recommended for some azoles. This study aimed to develop and validate a novel method for simultaneous determination of plasma concentrations of FLCZ, ITCZ, VRCZ, PSCZ, ISCZ and ITCZ-OH, an active metabolite of ITCZ, using ultra-high-performance liquid chromatography coupled with tandem mass spectrometry (UHPLC-MS/MS). DESIGN & METHODS A high-throughput solid-phase extraction method using 96-well MCX µElution Plate was selected as the pretreatment procedure. RESULTS The calibration curves for FLCZ, ITCZ, ITCZ-OH, VRCZ, PSCZ and ISCZ showed good linearity (back-calculation of calibrators: relative error ≤ 15% [LLOQ: ≤ 20%]) over wide ranges of 100-100000, 20-20000, 40-40000, 20-20000, 5-5000 and 50-50000 ng/mL, respectively. The validation results of all six drugs fulfilled the criteria of the guidance for bioanalytical method validation of the US Food and Drug Administration for within-batch and batch-to-batch precision and accuracy. The extraction recovery rates were good at ≥ 74.9%, and almost no matrix effects were found for all the drugs. The trough (10 h post-dose in 1 patient on PSCZ) drug concentrations in patients with hematologic malignancy who received oral FLCZ, ITCZ, VRCZ or PSCZ were quantified using the method developed. The measurements for all samples were within the ranges of the calibration curves, demonstrating the feasibility of clinical application of the novel method. CONCLUSIONS We have succeeded in developing a novel high-throughput method using UHPLC-MS/MS for simultaneous quantification of plasma concentrations of FLCZ, ITCZ, ITCZ-OH, VRCZ, PSCZ and ISCZ.
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Affiliation(s)
- Ryota Tanaka
- Department of Clinical Pharmacy, Oita University Hospital, Yufu-shi, Oita, Japan.
| | - Ken Shiraiwa
- Department of Clinical Pharmacy, Oita University Hospital, Yufu-shi, Oita, Japan
| | - Kuniko Takano
- Department of Hematology, Oita University Hospital, Yufu-shi, Oita, Japan
| | - Masao Ogata
- Department of Hematology, Oita University Hospital, Yufu-shi, Oita, Japan
| | - Shuhei Honda
- Department of Hematology, Oita University Hospital, Yufu-shi, Oita, Japan
| | - Natsumi Yoshida
- Department of Hematology, Oita University Hospital, Yufu-shi, Oita, Japan
| | - Kazuki Okuhiro
- Department of Hematology, Oita University Hospital, Yufu-shi, Oita, Japan
| | - Masaki Yoshida
- Department of Hematology, Oita University Hospital, Yufu-shi, Oita, Japan
| | - Kumiko Narahara
- Department of Hematology, Oita University Hospital, Yufu-shi, Oita, Japan
| | - Makoto Kai
- Department of Clinical Pharmacy, Oita University Hospital, Yufu-shi, Oita, Japan
| | - Ryosuke Tatsuta
- Department of Clinical Pharmacy, Oita University Hospital, Yufu-shi, Oita, Japan
| | - Hiroki Itoh
- Department of Clinical Pharmacy, Oita University Hospital, Yufu-shi, Oita, Japan
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Enko D, Zelzer S, Herrmann M, Krause R, Meinitzer A. Implementation of a Dual-Column Liquid Chromatography-Tandem Mass-Spectrometry Method for the Quantification of Isavuconazole in Clinical Practice. J Lab Physicians 2021; 13:123-128. [PMID: 34483556 PMCID: PMC8409122 DOI: 10.1055/s-0041-1730755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Objectives
Therapeutic drug monitoring (TDM) of isavuconazole, which is a novel broad-spectrum antimycoticum against invasive fungal infections, ensures an effective exposure of the drug and minimizes the risk of toxicity. This study is aimed at evaluating the analytical performance of a dual-column liquid chromatography-tandem mass-spectrometry (LC-MS/MS) method for isavuconazole quantification.
Materials and Methods
The method was performed on a Voyager TSQ Quantum triple quadrupole instrument equipped with an Ultimate 3000 chromatography system (Thermo Fisher Scientific, San Jose, California, United States). Analytical and preanalytical requirements of the isavuconazole LC-MS/MS method were evaluated. Sample stability measurements were performed at room temperature (RT) and in serum tubes with separator gel.
Results
The isavuconazole LC-MS/MS method was linear over the concentration range of 0.2 to 12.8 mg/L. The coefficient of determination (
r2
) always exceeded 0.999. Within- and between-run precision ranged between 1.4 to 2.9% and 1.5 to 3.0%, the recovery between 93.9 and 102.7%. At RT, serum samples were stable for 3 days. Isavuconazole serum concentrations were significantly lower after incubation (18 hours) in serum tubes with separator gel at RT.
Conclusion
The dual-column isavuconazole LC-MS/MS is a reliable tool for the TDM of isavuconazole. Serum samples are stable for at least 3 days and should be collected in tubes without separator gel.
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Affiliation(s)
- Dietmar Enko
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria.,Institute of Clinical Chemistry and Laboratory Medicine, General Hospital Hochsteiermark, Leoben, Austria
| | - Sieglinde Zelzer
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Markus Herrmann
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Robert Krause
- Department of Internal Medicine, Section of Infectious Diseases and Tropical Medicine, Medical University of Graz, Graz, Austria
| | - Andreas Meinitzer
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
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Lindner JM, Vogeser M, Sorg K, Grimm SH. A semi-automated, isotope-dilution high-resolution mass spectrometry assay for therapeutic drug monitoring of antidepressants. CLINICAL MASS SPECTROMETRY 2019; 14 Pt B:89-98. [DOI: 10.1016/j.clinms.2019.05.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 05/19/2019] [Accepted: 05/19/2019] [Indexed: 11/30/2022]
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Abujrais S, Olovsson M, Ahnoff M, Rasmusson AJ, Larsson A, Åkerfeldt T, Kultima K. A sensitive method detecting trace levels of levonorgestrel using LC-HRMS. Contraception 2019; 100:247-249. [PMID: 31216423 DOI: 10.1016/j.contraception.2019.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 05/16/2019] [Accepted: 06/02/2019] [Indexed: 01/14/2023]
Abstract
OBJECTIVE To develop a high resolution mass spectrometry (HRMS) method to quantify levonorgestrel (LNG) in serum. STUDY DESIGN Levonorgestrel was extracted using solid phase extraction and measured using liquid chromatography (LC) HRMS. RESULTS Low limit of quantification (LLOQ) was 25 pg/mL and low limit of detection (LLOD) was 12.5 pg/mL. Precision and accuracy bias were <10%. LNG in serum samples from Mirena® users ranged between 37 to 219 pg/mL (n=12). In eight out of 22 patients with suspected intrauterine device (IUD) expulsion LNG was detected (26-1272 pg/mL). CONCLUSION A sensitive, fast and simple LC-HRMS method was developed to detect trace levels of LNG.
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Affiliation(s)
- Sandy Abujrais
- Department of Medical Sciences, Clinical Chemistry, Uppsala University, Uppsala, Sweden
| | - Matts Olovsson
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - Martin Ahnoff
- Department of Marine Sciences, University of Gothenburg, Carl Skottbergs gata 22B, SE-41319 Gothenburg, Sweden
| | - Annica J Rasmusson
- Department of Medical Sciences, Clinical Pharmacology and Osteoporosis, Uppsala University, Sweden
| | - Anders Larsson
- Department of Medical Sciences, Clinical Chemistry, Uppsala University, Uppsala, Sweden
| | - Torbjörn Åkerfeldt
- Department of Medical Sciences, Clinical Chemistry, Uppsala University, Uppsala, Sweden
| | - Kim Kultima
- Department of Medical Sciences, Clinical Chemistry, Uppsala University, Uppsala, Sweden.
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