Triple quadrupole mass spectrometers, when operated in multiple reaction monitoring (MRM) mode, offer a unique combination of sensitivity, specificity, and dynamic range. Consequently, the triple quadrupole is the workhorse for high-throughput quantitation within the pharmaceutical industry. However, in the past, the unit mass resolution of quadrupole instruments has been a limitation when interference from matrix or metabolites cannot be eliminated. With recent advances in instrument design, triple quadrupole instruments now afford mass resolution of less than 0.1 Dalton (Da) full width at half maximum (FWHM). This paper describes the evaluation of an enhanced resolution triple quadrupole mass spectrometer for high-throughput bioanalysis with emphasis on comparison of selectivity, sensitivity, dynamic range, precision, accuracy, and stability under both unit mass (1 Da FWHM) and enhanced (
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http://dx.doi.org/10.1002/rcm.824 DOI Listing Publication Analysis
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ACS Omega
December 2024
Faculty of Health Science, University of Ss. Cyril and Methodius, 91701 Trnava, Slovakia.
J Chromatogr B Analyt Technol Biomed Life Sci
December 2024
Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa. Electronic address:
A robust LC-MS/MS method was developed to quantify total and unbound doravirine in plasma samples from patients receiving daily doses of 100 mg doravirine, in combination with lamivudine and tenofovir disoproxil fumarate, in a phase 3 clinical trial. The trial is ongoing, and sample analysis is planned to commence once all samples have been collected. The method was validated to quantify both total and unbound doravirine using a single calibration curve.
View Article and Find Full Text PDFBiomed Chromatogr
February 2025
Yangzhou University Medical College, Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Institute of Translational Medicine, Yangzhou University, Yangzhou, Jiangsu Province, China.
Mobocertinib is a potent selective tyrosine kinase inhibitor approved for the treatment of non-small cell lung cancer with activating EGFR exon 20 insertions. The aim of this study was to develop a procedure for liquid chromatography tandem mass spectrometry (LC-MS/MS) for the determination of mobocertinib and its metabolite desmethyl-mobocertinib in human plasma. The human plasma samples were precipitated with acetonitrile and analyzed using a Waters ACQUITY BEH C column coupled to a triple quadrupole mass spectrometer.
View Article and Find Full Text PDFDrug Des Devel Ther
January 2025
Clinical Medical College, Hubei University of Science and Technology, Xianning, People's Republic of China.
Purpose: Triple-negative breast cancer (TNBC) is a disease associated with high incidence and high mortality, which is a major problem threatening women's health. Xiaoyao Sanjie Decoction (XYSJD) exhibits remarkable therapeutic efficacy on TNBC; however, the underlying mechanism is unclear. This study verified the efficacy of XYSJD and its active component in the treatment of TNBC and explored its potential mechanism.
View Article and Find Full Text PDFRapid Commun Mass Spectrom
March 2025
Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada.
Rationale: In electrospray ionization and atmospheric pressure chemical ionization, the protonation site directly guides the ion's dissociation. But what if the site of protonation is ambiguous? In this study, we explored the unimolecular reactions of protonated α- and β-pinene ions with a combination of tandem mass spectrometry and theory. Each has multiple potential protonation sites that influence their chemistry.
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