Results 11 to 20 of about 4,297,069 (302)

Hybrid mass spectrometers for tandem mass spectrometry [PDF]

open access: yesJournal of the American Society for Mass Spectrometry, 2008
Mass spectrometers that use different types of analyzers for the first and second stages of mass analysis in tandem mass spectrometry (MS/MS) experiments are often referred to as "hybrid" mass spectrometers. The general goal in the design of a hybrid instrument is to combine different performance characteristics offered by various types of analyzers ...
Glish, Gary L., Burinsky, David J.
openaire   +3 more sources

Tandem mass spectrometry of deprotonated iodothyronines [PDF]

open access: yesRapid Communications in Mass Spectrometry, 2005
Abstract In order to assist with the development of more selective and sensitive methods for thyroid hormone analysis the [M–H] − anions of the iodothyronines T4, T3, rT3, (3,5)‐T2 and the non‐iodinated thyronine (T0) have been generated by negative ion electrospray mass ...
Couldwell, A. M.   +4 more
openaire   +4 more sources

Rationalising the retro‐Diels‐Alder fragmentation pattern of viscutins using electrospray interface‐tandem mass spectrometry coupled to theoretical modelling [PDF]

open access: yes, 2023
Although mass spectrometry (MS) is a powerful tool in structural elucidation of unknown flavonoids based on their unique fragmentation patterns, proposing the correct fragmentation mechanism is still a challenge from tandem mass spectrometry data only ...
Nikita Tawanda Tavengwa   +11 more
core   +1 more source

An Easily Overlooked Contamination of Syringes in Newborn Screening by Tandem Mass Spectrometry

open access: yesFrontiers in Pediatrics, 2021
Background: Tandem mass spectrometry becomes a common and important test in newborn screening, but potential contamination of the equipment has largely been ignored.Methods: The source of contamination through Biosan quality control samples was examined ...
Yanyun Wang, Yun Sun, Tao Jiang
doaj   +1 more source

Pitfall in the high-throughput quantification of whole blood cyclosporin A using liquid chromatography-tandem mass spectrometry [PDF]

open access: yes, 2005
In a growing number of laboratories the technique of liquid chromatography-tandem mass spectrometry is used for the quantification of cyclosporin A in whole blood, employing cyclosporin D as the internal standard. Cyclosporin A is extensively metabolized
Michael Vogeser   +3 more
core   +2 more sources

Liquid chromatography-tandem mass spectrometry - Application in the clinical laboratory [PDF]

open access: yes, 2003
This review provides a concise survey of liquid chromatography tandem mass spectrometry (LCTMS) as an emerging technology in clinical chemistry. The combination of two mass spectrometers with an interposed collision cell characterizes LCTMS as an ...
Michael Vogeser, Vogeser, Michael
core   +2 more sources

Quantification of voriconazole in plasma by liquid chromatography-tandem mass spectrometry [PDF]

open access: yes, 2005
A convenient liquid chromatography-tandem mass spectrometry method for the quantification of the triazole antifungal agent voriconazole in plasma samples is described. Fenbuconazole is used as an internal standard.
Spöhrer, Ute   +2 more
core   +1 more source

Quantification of sirolimus by liquid chromatography-tandem mass spectrometry using on-line solid-phase extraction [PDF]

open access: yes, 2002
Quantification of the new immunosuppressant sirolimus (syn. rapamycin; Rapamune((R))) in whole blood by chromatography is essential for its clinical use since no immunoassay is available although monitoring is mandatory.
Fleischer, Claudia   +5 more
core   +1 more source

Plasma free and total carnitine measured in children by tandem mass spectrometry

open access: yesBrazilian Journal of Medical and Biological Research, 2002
Free and total carnitine quantification is important as a complementary test for the diagnosis of unusual metabolic diseases, including fatty acid degradation disorders.
J.H. Osorio, M. Pourfarzam
doaj   +1 more source

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