Results 221 to 230 of about 2,787,968 (277)

UHPLC-MS/MS Quantification of Human Cytosolic Aldehyde Oxidase: Heat-Assisted In-Solution Protein Denaturation and Digestion. [PDF]

Rapid Commun Mass Spectrom
Chen S, Lau AJ.
europepmc   +1 more source

A Platform for High-Throughput Chemical Analysis of Foods: Characterization of Extra Virgin Olive by Direct Mass Spectrometry and Machine Learning. [PDF]

J Mass Spectrom
Sokkalingam N, Chu F, Zou J, Ashrafi S, Duncan MW.   +4 more
europepmc   +1 more source

Pyrite oxidation flux underestimated due to landscape-mediated microbial sulfate reduction

Pradhan S, Bakker L, Somlyay A, Haighipour N, Gautschi P, Christl M, Magnabosco C, Sen I, Hemingway J.   +8 more
europepmc   +1 more source

Quantification of Isotope-Labeled and Unlabeled Folates and Folate Catabolites in Urine Samples by Stable Isotope Dilution Assay

International Journal for Vitamin and Nutrition Research, 2013
Dual-label stable isotope dilution assays for the simultaneous quantification of isotopologic folates in clinical samples offer the perspective for differentiating between unlabeled folates from endogenous body pools and administered [13C5]-labeled folates from a test dose when performing bioavailability trials.
Michael Rychlik, Cornelia M Witthöft
exaly   +7 more sources

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Development of stable isotope dilution assays for ochratoxin A in blood samples

Analytical Biochemistry, 2011
Two new stable isotope dilution assays were developed for the quantification of ochratoxin A in human blood samples for exposure studies. The methods based on two different sample extraction and cleanup procedures including liquid-liquid extraction with following immunoaffinity chromatography (IA) as well as a dispersive solid-phase extraction (DSPE ...
Michael Rychlik, Oliver Frank, Thomas F. Hofmann   +2 more
exaly   +3 more sources

Stable isotope dilution assays in mycotoxin analysis

Analytical and Bioanalytical Chemistry, 2007
The principle and applications of stable isotope dilution assays (SIDAs) in mycotoxin analysis are critically reviewed. The general section includes historical aspects of SIDAs, the prerequisites and limitations of the use of stable isotopically labelled internal standards, and possible calibration procedures.
Michael Rychlik
exaly   +3 more sources

Pantothenic Acid Quantification: Method Comparison of a Stable Isotope Dilution Assay and a Microbiological Assay

International Journal for Vitamin and Nutrition Research, 2005
Different foods and feedstuffs were analyzed for pantothenic acid (PA) by the recently developed stable isotope dilution assay (SIDA) and by the standard method, a microbiological assay (MA). The SIDA involved the use of [13C3, 15N]-pantothenic acid as the internal standard and detection by liquid chromatography-tandem mass spectrometry.
Michael Rychlik
exaly   +4 more sources