Results 31 to 40 of about 5,352,584 (256)

Simultaneous Determination of 20 Pyrazines in Baijiu by Gas Chromatography-Tandem Mass Spectrometry [PDF]

Shipin Kexue
In this study, a method for the simultaneous determination of 20 pyrazines in baijiu was established by direct injection (DI) combined with gas chromatography-tandem mass spectrometry (GC-MS/MS), and the pyrazines in 10 brands of baijiu with different ...
WANG Na, SHEN Yi, ZHUANG Yuan, CHENG Wei, LUO Sen, ZHANG Yadong, LIU Zixuan, LIU Bing, GAO Hongbo
doaj   +1 more source

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

Toxics, 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, Danijela Fras, Nino Javernik, Helena Prosen   +3 more
doaj   +1 more source

Development and optimization of a gas chromatography/mass spectrometry method for the analysis of thermochemolytic degradation products of phthiocerol dimycocerosate waxes found in Mycobacterium tuberculosis. [PDF]

, 2013
RATIONALE: The phthiocerol dimycocerosates (PDIMs) are certain stable and hydrophobic waxes found in the cell membrane of Mycobacterium tuberculosis, bacteria that cause an infectious disease of growing concern worldwide.
O'Sullivan, Denise M., Minnikin, David E, O'Sullivan, Denise M, Minnikin, David E., Wright, Ian P., McNerney, Ruth, Lee, Oona CY, Morgan, Geraint H, Pillinger, Colin T., Nicoara, Simona C., Lee, Oona C. Y., Morgan, Geraint H., Pillinger, Collin T, Nicoara, Simona C, Wright, Ian P   +14 more
core   +1 more source

Gas-liquid chromatography-mass spectrometry of synthetic ceramides

Journal of Lipid Research, 1969
Two series of ceramides with either sphingosine (sphing-4-enine) or sphinganine as base and with one of the saturated fatty acids C16, C18, C20, C22, C24, C26, or oleic acid were analyzed as the 1,3-di-O-trimethylsilyl ether derivatives by gas ...
Bengt Samuelsson, Karin Samuelsson
doaj   +1 more source

Gas Chromatography-Mass Spectrometry of Volatile Organic Impurities in Whiskey

Техника и технология пищевых производств, 2022
Alcoholic beverages are complex multicomponent objects. Their quality and safety control is a serious analytical task that requires new, more accurate instrumental methods, e.g., chromatography-mass spectrometry.
Nataliya V. Shelekhova, Tamara M. Shelekhova, Liubov I. Skvortsova, Natalya V. Poltavskaya   +3 more
doaj   +1 more source

MOESM1 of Optimized method for determination of 16 FDA polycyclic aromatic hydrocarbons (PAHs) in mainstream cigarette smoke by gas chromatographyâ mass spectrometry

, 2018
Additional file 1. Details of the chemical standards used for the analysis; MS acquisition parameters for all three GC/MS systems, PAH levels in blank samples together with their respective Limits of Detection (LODs) and Limits of Quantification (LOQs) as well as repeatability and accuracy of fortified Quality Control (QC) samples.
Jeffery, Jana, Carradus, Maria, Songin, Karolina, Pettit, Michael, Pettit, Karl, Wright, Christopher   +5 more
openaire   +1 more source

Development of Quantitative Chemical Ionization Using Gas Chromatography/Mass Spectrometry and Gas Chromatography/Tandem Mass Spectrometry for Ambient Nitro- and Oxy-PAHs and Its Applications

Molecules, 2023
The concentration of polycyclic aromatic hydrocarbons (PAHs) in the atmosphere has been continually monitored since their toxicity became known, whereas nitro-PAHs (NPAHs) and oxy-PAHs (OPAHs), which are derivatives of PAHs by primary emissions or ...
Jungmin Jo, Ji-Yi Lee, Kyoung-Soon Jang, Atsushi Matsuki, Amgalan Natsagdorj, Yun-Gyong Ahn   +5 more
doaj   +1 more source

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

Journal 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

Recent progress on the detection of animal-derived food stimulants using mass spectrometry-based techniques

Frontiers in Nutrition, 2023
BackgroundThe misuse of animal-derived stimulants in food is becoming increasingly common, and mass spectrometry (MS) is used extensively for their detection and analysis.
Qiang Zhang, Hongying Du, Yingjian Zhang
doaj   +1 more source

MOESM1 of Steam distillation/drop-by-drop extraction with gas chromatographyâ mass spectrometry for fast determination of volatile components in jujube (Ziziphus jujuba Mill.) extract

, 2017
Additional file 1. Data about the performance of the SDE method.
Shi-Hao Sun, Guo-Bi Chai, Li, Peng, Xie, Jian-Ping, Su, Yue   +4 more
openaire   +1 more source