Results 1 to 10 of about 368,637 (249)

Simultaneous Method for Selected PBDEs and HBCDDs in Foodstuffs Using Gas Chromatography—Tandem Mass Spectrometry and Liquid Chromatography—Tandem Mass Spectrometry

open access: yesToxics, 2022
Flame retardants are added to consumer products to retard the ignition of combustible materials. Technical mixtures of polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCDD) were massively used for several decades.
Eva Lipičar   +3 more
doaj   +1 more source

Duvatrienediols in cuticular wax of Burley tobacco leaves

open access: yesJournal of Lipid Research, 1976
4, 8, 13-Duvatriene-1, 3-diol diastereoisomers have been identified in the cuticular wax of fresh Burley tobacco leaves. Their structures were determined by gas-liquid chromatography, mass spectrometry, and infrared and ultraviolet spectroscopy ...
S Y Chang, C Grunwald
doaj   +1 more source

Ammonia gas: an improved reagent for chemical ionization mass spectrometry of bile acid methyl ester acetates

open access: yesJournal of Lipid Research, 1981
The ammonia chemical ionization mass spectra of 28 methyl ester acetate derivatives of bile acids and related compounds have been determined by gas-liquid chromatography-mass spectrometry.
B R DeMark, P D Klein
doaj   +1 more source

Effect of different smoking times and temperatures on polycyclic aromatic hydrocarbon concentrations in smoked sausages [PDF]

open access: yesEmirates Journal of Food and Agriculture
Smoked pork and chicken sausages were prepared using three different time-temperature combinations; 60 °C for 4 hours, 75 °C for 3 hours, and 90 °C for 2 hours.
Anindita Mali   +2 more
doaj   +3 more sources

Combined liquid chromatography-tandem mass spectrometry analysis of progesterone metabolites. [PDF]

open access: yesPLoS ONE, 2015
Progesterone has a number of important functions throughout the human body. While the roles of progesterone are well known, the possible actions and implications of progesterone metabolites in different tissues remain to be determined. There is a growing
Maša Sinreih   +6 more
doaj   +1 more source

Aspectos analíticos e regulatórios na determinação de resíduos de macrolídeos em alimentos de origem animal por cromatografia líquida associada à espectrometria de massas

open access: yesQuímica Nova, 2013
This is an overview of LC-MS techniques applied for macrolide determination in food, including sample preparation and method validation, as well as the policies adopted by international agencies regarding their presence in food.
Marcela Sismotto   +2 more
doaj   +1 more source

LC-MSsim – a simulation software for liquid chromatography mass spectrometry data

open access: yesBMC Bioinformatics, 2008
Background Mass Spectrometry coupled to Liquid Chromatography (LC-MS) is commonly used to analyze the protein content of biological samples in large scale studies. The data resulting from an LC-MS experiment is huge, highly complex and noisy. Accordingly,
Gröpl Clemens   +4 more
doaj   +1 more source

Gluten Detection and Speciation by Liquid Chromatography Mass Spectrometry (LC-MS/MS)

open access: yesFoods, 2013
Liquid chromatography tandem mass spectrometry (LC-MS/MS) has been used historically in proteomics research for over 20 years. However, until recently LC-MS/MS has only been routinely used in food testing for small molecule contaminant detection, for ...
Stephen Lock
doaj   +1 more source

Determination of Flavonoid Glycosides by UPLC-MS to Authenticate Commercial Lemonade

open access: yesMolecules, 2019
So far, there is no report on the quality evaluation of lemonade available in the market. In this study, a sample preparation method was developed for the determination of flavonoid glycosides by ultra-performance liquid chromatography−mass ...
Ying Xue   +6 more
doaj   +1 more source

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