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Mehara J, Anania M, Kočovský P, Roithová J. Competing Mechanisms in Palladium-Catalyzed Alkoxycarbonylation of Styrene. ACS Catal 2024; 14:5710-5719. [PMID: 38660606 PMCID: PMC11036401 DOI: 10.1021/acscatal.4c00966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 03/18/2024] [Accepted: 03/18/2024] [Indexed: 04/26/2024]
Abstract
Palladium-catalyzed carbonylation is a versatile method for the synthesis of various aldehydes, esters, lactones, or lactams. Alkoxycarbonylation of alkenes with carbon monoxide and alcohol produces either saturated or unsaturated esters as a result of two distinct catalytic cycles. The existing literature presents an inconsistent account of the procedures favoring oxidative carbonylation products. In this study, we have monitored the intermediates featured in both catalytic cycles of the methoxycarbonylation of styrene PhCH=CH2 as a model substrate, including all short-lived intermediates, using mass spectrometry. Comparing the reaction kinetics of the intermediates in both cycles in the same reaction mixture shows that the reaction proceeding via alkoxy intermediate [PdII]-OR, which gives rise to the unsaturated product PhCH=CHCO2Me, is faster. However, with an advancing reaction time, the gradually changing reaction conditions begin to favor the catalytic cycle dominated by palladium hydride [PdII]-H and alkyl intermediates, affording the saturated products PhCH2CH2CO2Me and PhCH(CO2Me)CH3 preferentially. The role of the oxidant proved to be crucial: using p-benzoquinone results in a gradual decrease of the pH during the reaction, swaying the system from oxidative conditions toward the palladium hydride cycle. By contrast, copper(II) acetate as an oxidant guards the pH within the 5-7 range and facilitates the formation of the alkoxy palladium complex [PdII]-OR, which favors the oxidative reaction producing PhCH=CHCO2Me with high selectivity. Hence, it is the oxidant, rather than the catalyst, that controls the reaction outcome by a mechanistic switch. Unraveling these principles broadens the scope for developing alkoxycarbonylation reactions and their application in organic synthesis.
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Affiliation(s)
- Jaya Mehara
- Department
of Spectroscopy and Catalysis, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, Nijmegen 6525 AJ, The Netherlands
| | - Mariarosa Anania
- Department
of Spectroscopy and Catalysis, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, Nijmegen 6525 AJ, The Netherlands
- Department
of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, Prague 2 12843, Czech Republic
| | - Pavel Kočovský
- Department
of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, Prague 2 12843, Czech Republic
- Institute
of Organic Chemistry and Biochemistry, Czech
Academy of Sciences, Flemingovo nám. 2, Prague 6 16610, Czech Republic
| | - Jana Roithová
- Department
of Spectroscopy and Catalysis, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, Nijmegen 6525 AJ, The Netherlands
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2
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McRae G, Leek DM, Meija J, Shurmer B, Lehotay SJ, Polzer J, Melanson JE, Mester Z. Production and certification of BOTS-1: bovine muscle-certified reference material for incurred veterinary drug residues. Anal Bioanal Chem 2024; 416:759-771. [PMID: 37326831 PMCID: PMC10766801 DOI: 10.1007/s00216-023-04794-5] [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: 04/14/2023] [Revised: 06/01/2023] [Accepted: 06/05/2023] [Indexed: 06/17/2023]
Abstract
A freeze-dried bovine muscle-certified reference material (CRM), known as BOTS-1 (DOI: https://doi.org/10.4224/crm.2018.bots-1 ), containing incurred residues of commonly used veterinary drugs was produced and certified for the mass fraction of eight veterinary drug residues. Value assignment was carried out using liquid chromatography tandem mass spectrometry (LC-MS/MS) methods in conjunction with isotope dilution and standard addition approaches involving stable isotope internal standards. Data from the National Research Council of Canada (NRC), Canadian Food Inspection Agency (CFIA), United States Department of Agriculture (USDA), and the Federal Office of Consumer Protection and Food Safety in Germany (BVL) were used for value assignment. Results for two drug residues were also obtained through an international inter-laboratory comparison CCQM-K141/P178 organized under the auspices of the International Bureau of Weights and Measures (BIPM). Quantitative NMR (1H-qNMR) was used to characterize primary standards of all veterinary drugs certified. The certified mass fractions of the veterinary drug residues were 490 ± 100 µg/kg for chlorpromazine, 44 ± 4.4 µg/kg for ciprofloxacin, 3.3 ± 1.4 µg/kg for clenbuterol, 9.5 ± 0.8 µg/kg for dexamethasone, 57 ± 4.8 µg/kg for enrofloxacin, 3.0 ± 0.4 µg/kg for meloxicam, 12.4 ± 1.2 µg/kg for ractopamine, and 2290 ± 120 µg/kg for sulfadiazine with expanded uncertainties quoted (95% confidence) which include the effects due to between-bottle inhomogeneity, instability during long-term storage and transportation, and characterization.
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Affiliation(s)
- Garnet McRae
- National Research Council Canada, Metrology, 1200 Montreal Road, ON, K1A 0R6, Ottawa, Canada.
| | - Donald M Leek
- National Research Council Canada, Metrology, 1200 Montreal Road, ON, K1A 0R6, Ottawa, Canada
| | - Juris Meija
- National Research Council Canada, Metrology, 1200 Montreal Road, ON, K1A 0R6, Ottawa, Canada
| | - Bryn Shurmer
- Canadian Food Inspection Agency, 116 Veterinary Road, Saskatoon, SK, S7N 2R3, Canada
| | - Steven J Lehotay
- US Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, 600 East Mermaid Lane, Wyndmoor, PA, 19038, USA
| | - Joachim Polzer
- German Federal Office of Consumer Protection and Food Safety (BVL), Mauerstrasse 39-42, 10117, Berlin, Germany
| | - Jeremy E Melanson
- National Research Council Canada, Metrology, 1200 Montreal Road, ON, K1A 0R6, Ottawa, Canada
| | - Zoltan Mester
- National Research Council Canada, Metrology, 1200 Montreal Road, ON, K1A 0R6, Ottawa, Canada
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3
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Bates J, Bahadoor A, Tittlemier SA, Melanson JE. Comparison of calibration strategies for accurate quantitation by isotope dilution mass spectrometry: a case study of ochratoxin A in flour. Anal Bioanal Chem 2024; 416:487-496. [PMID: 38047937 PMCID: PMC10761375 DOI: 10.1007/s00216-023-05053-3] [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: 09/15/2023] [Revised: 11/08/2023] [Accepted: 11/13/2023] [Indexed: 12/05/2023]
Abstract
Analysis of low-level organic contaminants in complex matrices is essential for monitoring global food safety. However, balancing sample throughput with complex experimental designs and/or sample clean-up to best reduce matrix effects is a constant challenge. Multiple strategies exist to mitigate these effects, with internal standard-based methods such as isotope dilution mass spectrometry (IDMS) being the most advantageous. Here, multiple internal calibration strategies were investigated for the quantification of ochratoxin A (OTA) in wheat samples by liquid chromatography-mass spectrometry (LC-MS). Internal standard-based quantitation methods such as single (ID1MS), double (ID2MS), and quintuple (ID5MS) isotope dilution mass spectrometry, as well as external standard calibration, were explored and compared. A certified reference material (CRM) of OTA in flour, MYCO-1, was used to evaluate the accuracy of each method. External calibration generated results 18-38% lower than the certified value for MYCO-1, largely due to matrix suppression effects. Concurrently, consistently lower OTA mass fractions were obtained for the wheat samples upon quantitation by external calibration as opposed to ID1MS, ID2MS, and ID5MS. All isotope dilution methods produced results that fell within the expected range for MYCO-1 (3.17-4.93 µg/kg), validating their accuracy. However, an average 6% decrease in the OTA mass fraction was observed from results obtained by ID1MS compared to those by ID2MS and ID5MS. Upon scrutiny, these differences were attributed to an isotopic enrichment bias in the isotopically labelled internal standard [13C6]-OTA that was used for ID1MS, the OTAL-1 CRM. The advantages and limitations of each isotopic method are illustrated.
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Affiliation(s)
- Jennifer Bates
- National Research Council Canada, Metrology, 1200 Montreal Road, Ottawa, ON, K1A 0R6, Canada.
| | - Adilah Bahadoor
- National Research Council Canada, Metrology, 1200 Montreal Road, Ottawa, ON, K1A 0R6, Canada
| | - Sheryl A Tittlemier
- Canadian Grain Commission, Grain Research Laboratory, 1404-303 Main Street, Winnipeg, MB, R3C 3G8, Canada
| | - Jeremy E Melanson
- National Research Council Canada, Metrology, 1200 Montreal Road, Ottawa, ON, K1A 0R6, Canada
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4
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Schleicher S, O'Connor G, Mischnick P. Comparing 13C methyl and deuterated methyl isotopic labeling for the quantification of methyl cellulose patterns using mass spectrometry. Anal Bioanal Chem 2023; 415:1817-1828. [PMID: 36867199 PMCID: PMC10050035 DOI: 10.1007/s00216-023-04622-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/08/2023] [Accepted: 02/20/2023] [Indexed: 03/04/2023]
Abstract
The methyl substitution along and among the polymer chains of methyl cellulose (MC) is commonly analyzed by ESI-MS after perdeuteromethylation of the free-OH groups and partial hydrolysis to cello-oligosaccharides (COS). This method requires a correct quantification of the molar ratios of the constituents belonging to a particular degree of polymerization (DP). However, isotopic effects are most pronounced for H/D since their mass difference is 100%. Therefore, we investigated whether more precise and accurate results could be obtained for the methyl distribution of MC by MS of 13CH3 instead of CD3-etherified O-Me-COS. Internal isotope labeling with 13CH3 makes the COS of each DP chemically and physically much more similar, reducing mass fractionation effects, but at the same time requires more complex isotopic correction for evaluation. Results from syringe pump infusion ESI-TOF-MS with 13CH3 and CD3 as isotope label were equal. However, in the case of LC-MS with a gradient system, 13CH3 was superior to CD3. In the case of CD3, the occurrence of a partial separation of the isotopologs of a particular DP resulted in slight distortion of the methyl distribution since the signal response is significantly dependent on the solvent composition. Isocratic LC levels this problem, but one particular eluent-composition is not sufficient for a series of oligosaccharides with increasing DP due to peak broadening. In summary, 13CH3 is more robust to determine the methyl distribution of MCs. Both syringe pump and gradient-LC-MS measurements are possible, and the more complex isotope correction is not a disadvantage.
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Affiliation(s)
- Sarah Schleicher
- Institute of Food Chemistry, Technische Universität Braunschweig, Schleinitzstr. 20, 38106, Braunschweig, Germany.
| | - Gavin O'Connor
- Department of Biochemistry, Physikalisch-Technische-Bundesanstalt, Bundesallee 100, 38116, Braunschweig, Germany
- Department of Biochemistry and Bioinformatics, Technische Universität Braunschweig, Rebenring 56, 38106, Braunschweig, Germany
| | - Petra Mischnick
- Institute of Food Chemistry, Technische Universität Braunschweig, Schleinitzstr. 20, 38106, Braunschweig, Germany.
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5
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Oflu S, Erarpat S, Zaman BT, Günkara ÖT, Bakırdere S, Turak F. Combination of quadrupole isotope dilution mass spectrometry with simultaneous derivatization and spray assisted droplet formation-liquid phase microextraction for the determination of methamphetamine in human urine and serum samples by gas chromatography mass spectrometry. J Pharmacol Toxicol Methods 2023; 119:107207. [PMID: 35933004 DOI: 10.1016/j.vascn.2022.107207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/28/2022] [Accepted: 08/01/2022] [Indexed: 01/03/2023]
Abstract
In this study, an analytical method with high accuracy and precision was developed for the determination of methamphetamine in human urine and serum samples by gas chromatography-mass spectrometry (GC-MS). A simultaneous derivatization and spray assisted droplet formation-liquid phase microextraction (SADF-LPME) method was proposed to derivatize and preconcentrate target analyte. Quadruple isotope dilution (ID4) was used to provide high accuracy and precision for methamphetamine determination in the samples. After the optimization studies for the derivatization and microextraction parameters, limit of detection (LOD) and limit of quantitation (LOQ) for the developed SADF-LPME method were found to be 48.0 and 159.9 μg/kg, respectively. Recovery studies were implemented to verify the applicability and accuracy of the developed method for human urine and serum samples. The SADF-LPME method gave low percent recovery results (30.5-61.0%) for the spiked urine and serum samples showing that it failed to minimize or eliminate matrix effects for the analyte. Hence, methamphetamine acetamide-d3 was synthesized and purified in our research laboratory to be used as methamphetamine isotopic analogue in the ID4 method. When the SADF-LPME method was combined with ID4, the percent recovery values for urine and serum samples were calculated as 99.7-100.0% and 99.4-100.2%, respectively. These results demonstrated the applicability and accuracy of the proposed method for urine and serum samples.
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Affiliation(s)
- Sude Oflu
- Yıldız Technical University, Faculty of Art and Science, Department of Chemistry, 34,210, Davutpasa, Esenler, İstanbul, Türkiye
| | - Sezin Erarpat
- Yıldız Technical University, Faculty of Art and Science, Department of Chemistry, 34,210, Davutpasa, Esenler, İstanbul, Türkiye
| | - Buse Tuğba Zaman
- Yıldız Technical University, Faculty of Art and Science, Department of Chemistry, 34,210, Davutpasa, Esenler, İstanbul, Türkiye
| | - Ömer Tahir Günkara
- Yıldız Technical University, Faculty of Art and Science, Department of Chemistry, 34,210, Davutpasa, Esenler, İstanbul, Türkiye
| | - Sezgin Bakırdere
- Yıldız Technical University, Faculty of Art and Science, Department of Chemistry, 34,210, Davutpasa, Esenler, İstanbul, Türkiye; Turkish Academy of Sciences (TÜBA), Vedat Dalokay Street, No: 112, 06670, Çankaya, 06690, Ankara, Türkiye.
| | - Fatma Turak
- Yıldız Technical University, Faculty of Art and Science, Department of Chemistry, 34,210, Davutpasa, Esenler, İstanbul, Türkiye.
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6
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Erarpat S, Bodur S, Öner M, Günkara ÖT, Bakırdere S. A simple and efficient derivatization strategy combined with switchable solvent liquid-liquid microextraction hydroxychloroquine methyl acetate-d 3 -based quadruple isotope dilution gas chromatography mass spectrometry for the determination of hydroxychloroquine sulfate in biological fluids. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2022; 36:e9282. [PMID: 35229402 DOI: 10.1002/rcm.9282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 01/15/2022] [Accepted: 02/22/2022] [Indexed: 06/14/2023]
Abstract
RATIONALE A derivatization switchable solvent liquid-liquid microextraction quadruple isotope dilution gas chromatography mass spectrometry (D-SS-LLME-ID4 -GC/MS) method is presented for the determination of hydroxychloroquine sulfate in human biofluids. METHODS While mixing type/period and concentration of NaOH were optimized via a univariate optimization approach, a multivariate optimization approach was used to determine optimum values for relatively more important parameters such as volumes of derivatization agent (acetic anhydride), NaOH and switchable solvent. RESULTS Under the optimum experimental conditions, limit of detection and limit of quantification were calculated as 0.03 and 0.09 mg/kg (mass based), respectively. An isotopically labelled material (hydroxychloroquine methyl acetate-d3 ) was firstly synthesized to be used in ID4 experiments which give highly accurate and precise recovery results. After the application of D-SS-LLME-ID4 , superior percent recovery results were recorded as 99.9 ± 1.6-101.3 ± 1.2 for human serum, 99.9 ± 1.7-99.8 ± 1.8 for urine and 99.6 ± 1.5-101.0 ± 1.1 for saliva samples. CONCLUSIONS The developed D-SS-LLME-ID4 -GC/MS method compensates the complicated matrix effects of human biofluids and provides highly accurate quantification of an analyte with precise results.
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Affiliation(s)
- Sezin Erarpat
- Faculty of Art and Science, Chemistry Department, Yıldız Technical University, İstanbul, Turkey
| | - Süleyman Bodur
- Faculty of Art and Science, Chemistry Department, Yıldız Technical University, İstanbul, Turkey
| | - Miray Öner
- Faculty of Art and Science, Chemistry Department, Yıldız Technical University, İstanbul, Turkey
| | - Ömer Tahir Günkara
- Faculty of Art and Science, Chemistry Department, Yıldız Technical University, İstanbul, Turkey
| | - Sezgin Bakırdere
- Faculty of Art and Science, Chemistry Department, Yıldız Technical University, İstanbul, Turkey
- Turkish Academy of Sciences (TÜBA), Ankara, Turkey
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7
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Pagliano E. Bisphenol A measurement challenge. Anal Bioanal Chem 2021; 413:4105-4107. [PMID: 34164703 DOI: 10.1007/s00216-021-03383-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2021] [Indexed: 10/25/2022]
Affiliation(s)
- Enea Pagliano
- National Research Council Canada, 1200 Montreal Road, K1A 0R6, Ottawa, Ontario, Canada.
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8
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Erarpat S, Bodur S, Öner M, Günkara ÖT, Bakırdere S. Quadruple isotope dilution gas chromatography-mass spectrometry after simultaneous derivatization and spraying based fine droplet formation liquid phase microextraction method for the accurate and sensitive quantification of chloroquine phosphate in human serum, urine and saliva samples at trace levels. J Chromatogr A 2021; 1651:462273. [PMID: 34087718 DOI: 10.1016/j.chroma.2021.462273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/16/2021] [Accepted: 05/18/2021] [Indexed: 10/21/2022]
Abstract
This study presents an accurate and precise analytical strategy for the determination of chloroquine phosphate at trace levels in human body fluids (urine, serum, and saliva). Simultaneous derivatization-spraying based fine droplet formation-liquid phase microextraction (SD-SFDF-LPME) method was used to derivatize and preconcentrate the analyte prior to gas chromatography-mass spectrometry (GC-MS) measurements. Acetic anhydride was employed as derivatizing agent in this study. After optimizing the SD-SFDF-LPME method, the limit of detection (LOD) and limit of quantitation (LOQ) were found to be 0.16 and 0.53 mg/kg, respectively. Quadruple isotope dilution (ID4) was coupled to the SD-SFDF-LPME method in order to alleviate matrix effects and promote accuracy/precision of the method. Chloroquine acetamide-d3 was firstly synthesized in our research laboratory and used as the isotopic analogue of the analyte in the ID4 experiments. Superior percent recovery results (99.4% - 101.0%) with low standard deviation values were obtained for the spiked samples. This validated the developed SD-SFDF-LPME-ID4-GC-MS method as highly accurate and precise for the determination of chloroquine phosphate at trace levels. In addition, the isotopic analogue of the analyte was obtained via the acetamide derivative of the analyte, which is an alternative to obtain isotopic analogues of organic compounds that are not accessible or commercially available.
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Affiliation(s)
- Sezin Erarpat
- Yıldız Technical University, Faculty of Art and Science, Chemistry Department, 34210, İstanbul, Turkey
| | - Süleyman Bodur
- Yıldız Technical University, Faculty of Art and Science, Chemistry Department, 34210, İstanbul, Turkey
| | - Miray Öner
- Yıldız Technical University, Faculty of Art and Science, Chemistry Department, 34210, İstanbul, Turkey
| | - Ömer Tahir Günkara
- Yıldız Technical University, Faculty of Art and Science, Chemistry Department, 34210, İstanbul, Turkey
| | - Sezgin Bakırdere
- Yıldız Technical University, Faculty of Art and Science, Chemistry Department, 34210, İstanbul, Turkey; Turkish Academy of Sciences (TÜBA), Piyade Street No: 27, 06690 Çankaya, Ankara, Turkey.
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9
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Determination of seventeen free amino acids in human urine and plasma samples using quadruple isotope dilution mass spectrometry combined with hydrophilic interaction liquid chromatography - Tandem mass spectrometry. J Chromatogr A 2021; 1641:461970. [PMID: 33611120 DOI: 10.1016/j.chroma.2021.461970] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Revised: 02/01/2021] [Accepted: 02/03/2021] [Indexed: 11/23/2022]
Abstract
Taking into account the growing demand for new analytical procedures that are appropriate for analysis of complex biological samples with increased sensitivity, accuracy and precision, a novel analytical method was described for the determination of underivatized amino acids in human plasma and urine samples. The presented analytical procedure involved the direct analysis of urine samples and the analysis of plasma samples followed by a simple protein precipitation protocol. Samples were analyzed using a simple and fast chromatographic method developed for the determination of 17 different amino acids by liquid chromatography - tandem mass spectrometry. The limit of detection and quantification values for amino acids were ranged between 0.03-2.26 µmol kg-1 and 0.09-7.54 µmol kg-1. Matrix effects of plasma and urine on the quantification of analytes were determined by spiking experiments. The accuracy of method was evaluated by matrix matching and quadruple isotope dilution strategies. Excellent accuracy and precision were obtained with the use isotope labeled amino acids demonstrating the high reliability and reproducibility of the proposed method. The percent recovery values were found to be between 98.70 - 101.68% with%RSD below than 1.62% for human plasma and 99.14 - 101.78% with%RSD below than 2.44% for urine samples.
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10
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Bodur S, Erarpat S, Dalgıç Bozyiğit G, Selali Chormey D, Öz E, Özdoğan N, Bakırdere S. A sensitive determination method for trace bisphenol A in bottled water and wastewater samples: Binary solvent liquid phase microextraction-quadrupole isotope dilution-gas chromatography-mass spectrometry. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105532] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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11
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Preparation of Internal Standards for 2D-UPLC-MS/MS Quantification of Noncanonical DNA Bases. Methods Mol Biol 2020. [PMID: 32822027 DOI: 10.1007/978-1-0716-0876-0_10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Reliable quantitative analysis of DNA modification using liquid chromatography coupled with tandem mass spectrometry requires stable isotope-labeled internal standards. Only some of them are commercially available. Here we present a method allowing for the synthesis of [13C10,15N2]-5-methyl-2'-deoxycytidine from [13C10,15N2]-2'-deoxythymidine. We also describe an approach for the oxidation of [13C10,15N2]-5-methyl-2'-deoxycytidine and [13C10,15N2]-2'-deoxythymidine with Na2S2O8, leading to the generation of [13C10,15N2]-5-formyl-2'-deoxycytidine, [13C10,15N2]-5-carboxy-2'-deoxycytidine or [13C10,15N2]-5-(hydroxymethyl)-2'-deoxyuridine, correspondingly. Moreover, we provide optimized protocols for the oxidation of [13C5,15N2]-thymine to [13C10,15N2]-5-hydroxymethyluracil, [13C10,15N2]-5-formyluracil, and [13C10,15N2]-5-carboxyuracil using Na2S2O8.
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12
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Arı B, Can SZ, Bakırdere S. Traceable and accurate quantification of iron in seawater using isotope dilution calibration strategies by triple quadrupole ICP-MS/MS: Characterization measurements of iron in a candidate seawater CRM. Talanta 2020; 209:120503. [DOI: 10.1016/j.talanta.2019.120503] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 10/20/2019] [Accepted: 10/23/2019] [Indexed: 01/16/2023]
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13
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A novel determination method for diuron in seaweed samples: Combination of quadruple isotope dilution strategy with liquid chromatography - quadrupole time of flight - tandem mass spectrometry for superior accuracy and precision. J Chromatogr A 2020; 1611:460612. [DOI: 10.1016/j.chroma.2019.460612] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/08/2019] [Accepted: 10/08/2019] [Indexed: 11/20/2022]
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14
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Bodur S, Erarpat S, Chormey DS, Bozyiğit GD, Öz E, Özdoğan N, Bakırdere S. Assessment of different isotope dilution strategies and their combination with switchable solvent-based liquid phase microextraction prior to the quantification of bisphenol A at trace levels via GC-MS. NEW J CHEM 2020. [DOI: 10.1039/d0nj02706e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Different isotope dilution strategies were evaluated to quantify bisphenol A. High accuracy and precision were achieved by SS-LPME and ID4 combination.
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Affiliation(s)
- Süleyman Bodur
- Yıldız Technical University
- Faculty of Art and Science
- Department of Chemistry
- İstanbul
- Turkey
| | - Sezin Erarpat
- Yıldız Technical University
- Faculty of Art and Science
- Department of Chemistry
- İstanbul
- Turkey
| | - Dotse Selali Chormey
- Yıldız Technical University
- Faculty of Art and Science
- Department of Chemistry
- İstanbul
- Turkey
| | - Gamze Dalgıç Bozyiğit
- Yildiz Technical University
- Faculty of Civil Engineering
- Department of Environmental Engineering
- 34220 İstanbul
- Turkey
| | - Ersoy Öz
- Yıldız Technical University
- Faculty of Arts and Sciences
- Department of Statistics
- İstanbul
- Turkey
| | - Nizamettin Özdoğan
- Bülent Ecevit University
- Institute of Science
- Department of Environmental Engineering
- Zonguldak
- Turkey
| | - Sezgin Bakırdere
- Yıldız Technical University
- Faculty of Art and Science
- Department of Chemistry
- İstanbul
- Turkey
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15
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Switchable solvent liquid-phase microextraction-gas chromatography-quadrupole isotope dilution mass spectrometry for the determination of 4‑n‑nonylphenol in municipal wastewater. Microchem J 2019. [DOI: 10.1016/j.microc.2018.08.049] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Comparative study of high performance liquid chromatography species-specific and species-unspecific isotope dilution inductively coupled plasma mass spectrometry. A case study of selenomethionine and the origin of its oxidized form. Microchem J 2018. [DOI: 10.1016/j.microc.2018.08.045] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Pagliano E, Campanella B, D'Ulivo A, Mester Z. Derivatization chemistries for the determination of inorganic anions and structurally related compounds by gas chromatography - A review. Anal Chim Acta 2018; 1025:12-40. [DOI: 10.1016/j.aca.2018.03.043] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 03/21/2018] [Accepted: 03/22/2018] [Indexed: 12/12/2022]
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18
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Schatschneider S, Abdelrazig S, Safo L, Henstra AM, Millat T, Kim DH, Winzer K, Minton NP, Barrett DA. Quantitative Isotope-Dilution High-Resolution-Mass-Spectrometry Analysis of Multiple Intracellular Metabolites in Clostridium autoethanogenum with Uniformly 13C-Labeled Standards Derived from Spirulina. Anal Chem 2018. [PMID: 29533656 DOI: 10.1021/acs.analchem.7b04758] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We have investigated the applicability of commercially available lyophilized spirulina ( Arthrospira platensis), a microorganism uniformly labeled with 13C, as a readily accessible source of multiple 13C-labeled metabolites suitable as internal standards for the quantitative determination of intracellular bacterial metabolites. Metabolites of interest were analyzed by hydrophilic-interaction liquid chromatography coupled with high-resolution mass spectrometry. Multiple internal standards obtained from uniformly (U)-13C-labeled extracts from spirulina were used to enable isotope-dilution mass spectrometry (IDMS) in the identification and quantification of intracellular metabolites. Extraction of the intracellular metabolites of Clostridium autoethanogenum using 2:1:1 chloroform/methanol/water was found to be the optimal method in comparison with freeze-thaw, homogenization, and sonication methods. The limits of quantification were ≤1 μM with excellent linearity for all of the calibration curves ( R2 ≥ 0.99) for 74 metabolites. The precision and accuracy were found to be within relative standard deviations (RSDs) of 15% for 49 of the metabolites and within RSDs of 20% for all of the metabolites. The method was applied to study the effects of feeding different levels of carbon monoxide (as a carbon source) on the central metabolism and Wood-Ljungdahl pathway of C. autoethanogenum grown in continuous culture over 35 days. Using LC-IDMS with U-13C spirulina allowed the successful quantification of 52 metabolites in the samples, including amino acids, carboxylic acids, sugar phosphates, purines, and pyrimidines. The method provided absolute quantitative data on intracellular metabolites that was suitable for computational modeling to understand and optimize the C. autoethanogenum metabolic pathways active in gas fermentation.
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Affiliation(s)
- Sarah Schatschneider
- Centre for Analytical Bioscience, School of Pharmacy , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Salah Abdelrazig
- Centre for Analytical Bioscience, School of Pharmacy , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Laudina Safo
- Centre for Analytical Bioscience, School of Pharmacy , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Anne M Henstra
- Clostridia Research Group, SBRC-Nottingham, a BBSRC/EPSRC Synthetic Biology Research Centre, School of Life Sciences , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Thomas Millat
- Clostridia Research Group, SBRC-Nottingham, a BBSRC/EPSRC Synthetic Biology Research Centre, School of Life Sciences , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Dong-Hyun Kim
- Centre for Analytical Bioscience, School of Pharmacy , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Klaus Winzer
- Clostridia Research Group, SBRC-Nottingham, a BBSRC/EPSRC Synthetic Biology Research Centre, School of Life Sciences , University of Nottingham , Nottingham NG7 2RD , U.K
| | - Nigel P Minton
- Clostridia Research Group, SBRC-Nottingham, a BBSRC/EPSRC Synthetic Biology Research Centre, School of Life Sciences , University of Nottingham , Nottingham NG7 2RD , U.K
| | - David A Barrett
- Centre for Analytical Bioscience, School of Pharmacy , University of Nottingham , Nottingham NG7 2RD , U.K
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19
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Chormey DS, Öztürk Er E, Erarpat S, Özzeybek G, Arı B, Bakirdere S. A novel analytical approach for the determination of parathion methyl in water: quadrupole isotope dilution mass spectrometry-dispersive liquid–liquid microextraction using multivariate optimization. Analyst 2018; 143:1141-1146. [DOI: 10.1039/c7an02014g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Dispersive liquid–liquid microextraction was coupled with quadruple isotope dilution mass spectrometry for the sensitive and accurate determination of parathion methyl in water.
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Affiliation(s)
- Dotse Selali Chormey
- Yıldız Technical University
- Faculty of Art and Science
- Chemistry Department
- İstanbul
- Turkey
| | - Elif Öztürk Er
- Yıldız Technical University
- Faculty of Chemical and Metallurgical Engineering
- Chemical Engineering Department
- İstanbul
- Turkey
| | - Sezin Erarpat
- Yıldız Technical University
- Faculty of Art and Science
- Chemistry Department
- İstanbul
- Turkey
| | - Gözde Özzeybek
- Yıldız Technical University
- Faculty of Art and Science
- Chemistry Department
- İstanbul
- Turkey
| | - Betül Arı
- Yıldız Technical University
- Faculty of Art and Science
- Chemistry Department
- İstanbul
- Turkey
| | - Sezgin Bakirdere
- Yıldız Technical University
- Faculty of Art and Science
- Chemistry Department
- İstanbul
- Turkey
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20
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Montes-Bayón M, Bettmer J. The Use of Stable Isotopic Tracers in Metallomics Studies. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1055:111-137. [DOI: 10.1007/978-3-319-90143-5_6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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21
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22
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Milačič R, Zuliani T, Vidmar J, Ščančar J. Analytical Procedures for Speciation of Chromium, Aluminum, and Tin in Environmental and Biological Samples. Metallomics 2016. [DOI: 10.1002/9783527694907.ch8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Radmila Milačič
- Department of Environmental Sciences; Jožef Stefan Institute; Jamova 39 1000 Ljubljana Slovenia
- Jožef Stefan International Postgraduate School; Jamova 39 1000 Ljubljana Slovenia
| | - Tea Zuliani
- Department of Environmental Sciences; Jožef Stefan Institute; Jamova 39 1000 Ljubljana Slovenia
| | - Janja Vidmar
- Department of Environmental Sciences; Jožef Stefan Institute; Jamova 39 1000 Ljubljana Slovenia
- Jožef Stefan International Postgraduate School; Jamova 39 1000 Ljubljana Slovenia
| | - Janez Ščančar
- Department of Environmental Sciences; Jožef Stefan Institute; Jamova 39 1000 Ljubljana Slovenia
- Jožef Stefan International Postgraduate School; Jamova 39 1000 Ljubljana Slovenia
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23
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Affiliation(s)
- Enea Pagliano
- National Research Council of Canada, 1200 Montreal
Road, Ottawa, Ontario K1A 0R6, Canada
| | - Zoltán Mester
- National Research Council of Canada, 1200 Montreal
Road, Ottawa, Ontario K1A 0R6, Canada
| | - Juris Meija
- National Research Council of Canada, 1200 Montreal
Road, Ottawa, Ontario K1A 0R6, Canada
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24
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Ammazzini S, Onor M, Pagliano E, Mester Z, Campanella B, Pitzalis E, Bramanti E, D’Ulivo A. Determination of thiocyanate in saliva by headspace gas chromatography-mass spectrometry, following a single-step aqueous derivatization with triethyloxonium tetrafluoroborate. J Chromatogr A 2015; 1400:124-30. [DOI: 10.1016/j.chroma.2015.04.040] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 04/15/2015] [Accepted: 04/21/2015] [Indexed: 10/23/2022]
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25
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Affiliation(s)
- Enea Pagliano
- National Research Council of Canada, 1200 Montreal Road, Ottawa, ON, K1A 0R6, Canada,
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26
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High-precision quadruple isotope dilution method for simultaneous determination of nitrite and nitrate in seawater by GCMS after derivatization with triethyloxonium tetrafluoroborate. Anal Chim Acta 2014; 824:36-41. [DOI: 10.1016/j.aca.2014.03.018] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 03/10/2014] [Accepted: 03/13/2014] [Indexed: 11/24/2022]
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27
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da Silva MAO, Sussulini A, Arruda MAZ. Metalloproteomics as an interdisciplinary area involving proteins and metals. Expert Rev Proteomics 2014; 7:387-400. [DOI: 10.1586/epr.10.16] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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28
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Villanueva J, Carrascal M, Abian J. Isotope dilution mass spectrometry for absolute quantification in proteomics: Concepts and strategies. J Proteomics 2014; 96:184-99. [DOI: 10.1016/j.jprot.2013.11.004] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 11/01/2013] [Indexed: 12/25/2022]
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29
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Metrology for metalloproteins—where are we now, where are we heading? Anal Bioanal Chem 2013; 405:5697-723. [DOI: 10.1007/s00216-013-6933-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 03/18/2013] [Accepted: 03/19/2013] [Indexed: 01/10/2023]
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30
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Reduction of measurement uncertainty by experimental design in high-order (double, triple, and quadruple) isotope dilution mass spectrometry: application to GC-MS measurement of bromide. Anal Bioanal Chem 2013; 405:2879-87. [DOI: 10.1007/s00216-013-6724-5] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2012] [Revised: 12/12/2012] [Accepted: 01/11/2013] [Indexed: 10/27/2022]
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31
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Isotopic analyses by ICP-MS in clinical samples. Anal Bioanal Chem 2012; 405:2785-97. [DOI: 10.1007/s00216-012-6457-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 09/24/2012] [Accepted: 09/25/2012] [Indexed: 11/26/2022]
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32
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Novotnik B, Zuliani T, Martinčič A, Ščančar J, Milačič R. Preparation of Cr(VI) and Cr(III) isotopic spike solutions from 50Cr and 53Cr enriched oxides without the use of oxidizing and/or reducing agents. Talanta 2012; 99:83-90. [DOI: 10.1016/j.talanta.2012.05.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Revised: 05/01/2012] [Accepted: 05/03/2012] [Indexed: 11/28/2022]
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33
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Frank C, Rienitz O, Swart C, Schiel D. Improving species-specific IDMS: the advantages of triple IDMS. Anal Bioanal Chem 2012; 405:1913-9. [PMID: 23010841 DOI: 10.1007/s00216-012-6315-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 07/26/2012] [Accepted: 07/30/2012] [Indexed: 10/28/2022]
Abstract
Triple isotope dilution mass spectrometry (triple IDMS) has been applied for the first time on protein quantification, especially on transferrin. Transferrin as an acute phase protein is a marker for several inflammation processes in the human body. Therefore, in Germany, the accurate and precise measurement of this important analyte is required. In this work, a new approach to triple IDMS is described and compared to double IDMS. Also, complete uncertainty budgets for both methods were set up to demonstrate the ability of this method to be used as a reference procedure. The relative expanded uncertainty (k=2) for triple IDMS (3.6 %) is smaller than the one for double IDMS (4.0 %). The content of transferrin found in the human serum reference material ERM-DA470k/IFCC ((2.41±0.08) g/kg) with both methods was in good agreement with each other and with the certificate. For triple IDMS ((2.426±0.086) g/kg) and for double IDMS ((2.317±0.092) g/kg), transferrin was determined. Although triple IDMS is a little more time consuming compared to double IDMS, there is the advantage that the isotopic composition of the spike material does not have to be determined. This is very useful especially in case of a marginal isotopic enrichment in the spike or problems with the accurate measurement of the spike isotope ratio.
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Affiliation(s)
- Claudia Frank
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany.
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34
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Ouerdane L, Meija J, Bakirdere S, Yang L, Mester Z. Nonlinear Signal Response in Electrospray Mass Spectrometry: Implications for Quantitation of Arsenobetaine Using Stable Isotope Labeling by Liquid Chromatography and Electrospray Orbitrap Mass Spectrometry. Anal Chem 2012; 84:3958-64. [DOI: 10.1021/ac203137n] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Laurent Ouerdane
- Institute for National Measurement
Standards, National Research Council Canada, Ottawa, ON K1A 0R6, Canada
- Laboratoire de Chimie Analytique
Bio-Inorganique et Environnement, IPREM, Université de Pau et des pays de l’Adour/CNRS UMR 5254,
Hélioparc, 2 Avenue du Pr. Angot, 64000 Pau, France
| | - Juris Meija
- Institute for National Measurement
Standards, National Research Council Canada, Ottawa, ON K1A 0R6, Canada
| | - Sezgin Bakirdere
- Institute for National Measurement
Standards, National Research Council Canada, Ottawa, ON K1A 0R6, Canada
- Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey
- Department of Science Education, Yıldız Technical University, 34220, İstanbul,
Turkey
| | - Lu Yang
- Institute for National Measurement
Standards, National Research Council Canada, Ottawa, ON K1A 0R6, Canada
| | - Zoltán Mester
- Institute for National Measurement
Standards, National Research Council Canada, Ottawa, ON K1A 0R6, Canada
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35
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Pagliano E, Meija J, Sturgeon RE, Mester Z, D’Ulivo A. Negative Chemical Ionization GC/MS Determination of Nitrite and Nitrate in Seawater Using Exact Matching Double Spike Isotope Dilution and Derivatization with Triethyloxonium Tetrafluoroborate. Anal Chem 2012; 84:2592-6. [DOI: 10.1021/ac2030128] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Enea Pagliano
- Scuola Normale Superiore, Piazza dei Cavalieri, 7, 56126, Pisa, Italy
- National Research Council of Canada, 1200 Montreal Road, Ottawa, ON K1A
0R6, Canada
| | - Juris Meija
- National Research Council of Canada, 1200 Montreal Road, Ottawa, ON K1A
0R6, Canada
| | - Ralph E. Sturgeon
- National Research Council of Canada, 1200 Montreal Road, Ottawa, ON K1A
0R6, Canada
| | - Zoltan Mester
- National Research Council of Canada, 1200 Montreal Road, Ottawa, ON K1A
0R6, Canada
| | - Alessandro D’Ulivo
- CNR, Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organometallici,
Via G. Moruzzi, 1, 56124 Pisa, Italy
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36
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Clémens S, Monperrus M, Donard OF, Amouroux D, Guérin T. Mercury speciation in seafood using isotope dilution analysis: A review. Talanta 2012; 89:12-20. [DOI: 10.1016/j.talanta.2011.12.064] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Revised: 12/20/2011] [Accepted: 12/22/2011] [Indexed: 10/14/2022]
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37
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Impact of pump flow fluctuations on post column online ID-ICP-MS. Anal Bioanal Chem 2011; 401:2025-31. [DOI: 10.1007/s00216-011-5293-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Revised: 07/25/2011] [Accepted: 07/26/2011] [Indexed: 10/17/2022]
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38
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Alternative approach to post column online isotope dilution ICP-MS. Talanta 2011; 83:1544-51. [DOI: 10.1016/j.talanta.2010.11.062] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2010] [Revised: 10/29/2010] [Accepted: 11/22/2010] [Indexed: 11/23/2022]
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39
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Mechlińska A, Wolska L, Namieśnik J, Wolska L. Isotope-labeled substances in analysis of persistent organic pollutants in environmental samples. Trends Analyt Chem 2010. [DOI: 10.1016/j.trac.2010.04.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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40
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Application of isotope dilution ICP–MS techniques to quantitative proteomics. Anal Bioanal Chem 2010; 397:3495-502. [DOI: 10.1007/s00216-010-3861-y] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2010] [Revised: 05/13/2010] [Accepted: 05/18/2010] [Indexed: 01/31/2023]
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41
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Lindahl P, Keith-Roach M, Worsfold P, Choi MS, Shin HS, Lee SH. Ultra-trace determination of plutonium in marine samples using multi-collector inductively coupled plasma mass spectrometry. Anal Chim Acta 2010; 671:61-9. [DOI: 10.1016/j.aca.2010.05.012] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2010] [Revised: 04/27/2010] [Accepted: 05/09/2010] [Indexed: 11/28/2022]
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42
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Affiliation(s)
- Diane Beauchemin
- Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
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43
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González-Antuña A, Rodríguez-González P, Centineo G, García Alonso JI. Evaluation of minimal 13C-labelling for stable isotope dilution in organic analysis. Analyst 2010; 135:953-64. [PMID: 20419243 DOI: 10.1039/b924432h] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A procedure for Stable Isotope Dilution Analysis in molecular Mass Spectrometry which does not require a methodological calibration graph and can be applied in combination with minimal labelling has been evaluated. This alternative approach is based on the determination of the molar fractions for each pure isotope pattern (natural abundance or labelled) contributing to the isotope pattern observed in the mixture of natural abundance and labelled molecules by multiple linear regression. Two labelled compounds, (13)C(1)-labelled or (13)C(6)-labelled phenol, were compared to study the influence of the number of (13)C atoms in the labelled molecule. The procedure was evaluated by comparing the results obtained for the determination of phenol in NIST 1584 CRM by GC-EI-MS using the classical isotope dilution calibration procedure and the new procedure based on multiple linear regression of isotope patterns without a calibration graph. The results obtained using the proposed procedure agreed well with both the certified values and those obtained using the classical Isotope Dilution Mass Spectrometry (IDMS) calibration procedures. For the evaluated procedure, a full uncertainty budget determination has been developed taking into account all uncertainty sources, including those derived from the uncertainties in the isotope patterns of the natural and labelled compounds. The measurements with the (13)C(1)-labelled phenol provided lower propagated uncertainties in comparison to the use of (13)C(6)-labelled phenol.
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Affiliation(s)
- Ana González-Antuña
- Department of Physical and Analytical Chemistry, Faculty of Chemistry, University of Oviedo, Spain
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44
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Therapeutic monitoring of serum digoxin for patients with heart failure using a rapid LC-MS/MS method. Clin Biochem 2010; 43:307-13. [DOI: 10.1016/j.clinbiochem.2009.09.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2009] [Revised: 09/05/2009] [Accepted: 09/30/2009] [Indexed: 11/18/2022]
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45
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Liu GY, Wang W, Jia JY, Lu C, Liu YM, Zhang MQ, Liu Y, Li SJ, Yu C. Liquid chromatography tandem mass spectrometry method for determination of bisoprolol in human plasma using d5-bisoprolol as the internal standard. Biomed Chromatogr 2009; 24:574-80. [PMID: 19810009 DOI: 10.1002/bmc.1329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A simple, reliable and sensitive liquid chromatography tandem mass spectrometry (LC-MS/MS) protocol was developed and validated for quantification of bisoprolol in human plasma. The sample was pretreated with a simple procedure of protein precipitation and an isotope-labeled d5-bisoprolol was used as internal standard. The chromatographic separation was performed on a Capcell Pak C(18) MG III column (100 mm x 2.0 mm, 5 microm). The protonated ion of the analyte was detected in positive ionization by multiple reaction monitoring mode. The mass transition pairs of m/z 326.3 --> 116.3 and m/z 331.3 --> 121.3 were used to detect bisoprolol and the internal standard, respectively. Linearity, accuracy, precision, recovery, matrix effect, dilution test and stability were evaluated during method validation over the range of 0.5-100 ng/mL. The validated method was successfully applied to analyze human plasma samples in a bisoprolol bioavailability study.
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Affiliation(s)
- Gang-Yi Liu
- Central Laboratory, Shanghai Xuhui Central Hospital,966 Huaihai Middle Road, Shanghai 200031, China
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46
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Tomaiuolo M, Vecchione G, Margaglione M, Pisanelli D, Grandone E. Stable-isotope dilution LC–ESI-MS/MS techniques for the quantification of total homocysteine in human plasma. J Chromatogr B Analyt Technol Biomed Life Sci 2009; 877:3292-9. [DOI: 10.1016/j.jchromb.2009.07.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2009] [Revised: 07/03/2009] [Accepted: 07/15/2009] [Indexed: 11/25/2022]
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47
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Hoppler M, Zeder C, Walczyk T. Quantification of Ferritin-Bound Iron in Plant Samples by Isotope Tagging and Species-Specific Isotope Dilution Mass Spectrometry. Anal Chem 2009; 81:7368-72. [DOI: 10.1021/ac900885j] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthias Hoppler
- Laboratory for Human Nutrition, Institute of Food Science and Nutrition, ETH Zurich, 8092 Zurich, Switzerland, and Departments of Chemistry (Science) and Biochemistry (Medicine), National University of Singapore (NUS), 117543 Singapore
| | - Christophe Zeder
- Laboratory for Human Nutrition, Institute of Food Science and Nutrition, ETH Zurich, 8092 Zurich, Switzerland, and Departments of Chemistry (Science) and Biochemistry (Medicine), National University of Singapore (NUS), 117543 Singapore
| | - Thomas Walczyk
- Laboratory for Human Nutrition, Institute of Food Science and Nutrition, ETH Zurich, 8092 Zurich, Switzerland, and Departments of Chemistry (Science) and Biochemistry (Medicine), National University of Singapore (NUS), 117543 Singapore
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48
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Ouerdane L, Mester Z, Meija J. General Equation for Multiple Spiking Isotope Dilution Mass Spectrometry. Anal Chem 2009; 81:5075-9. [DOI: 10.1021/ac900205b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Laurent Ouerdane
- Institute for National Measurement Standards, National Research Council Canada 1200 Montreal Rd., Ottawa ON K1A 0R6, Canada
| | - Zoltán Mester
- Institute for National Measurement Standards, National Research Council Canada 1200 Montreal Rd., Ottawa ON K1A 0R6, Canada
| | - Juris Meija
- Institute for National Measurement Standards, National Research Council Canada 1200 Montreal Rd., Ottawa ON K1A 0R6, Canada
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49
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Isotope scrambling and error magnification in multiple-spiking isotope dilution. Anal Bioanal Chem 2009; 394:199-205. [DOI: 10.1007/s00216-009-2619-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2008] [Revised: 12/26/2008] [Accepted: 01/09/2009] [Indexed: 11/25/2022]
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50
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Meija J, Ouerdane L, Mester Z. Describing chemical transformations in multiple spiking isotope dilution: fundamental aspects and definitions. Analyst 2009; 134:466-71. [DOI: 10.1039/b814388a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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