Molecular Formula Determination of Trimethylsilyl Derivatives of Lipids by Gas Chromatography-Microwave-Induced Plasma-Atomic Emission Spectrometry

Autor:	Kazuyoshi Nakahara, Tasuku Takamatsu, Shinya Yamamoto, Katsumi Ishiwata
Rok vydání:	1998
Předmět:	chemistry.chemical_compound chemistry Silicon Trimethylsilyl Analytical chemistry chemistry.chemical_element Ether Plasma Gas chromatography Oxygen Emission intensity Helium
Zdroj:	Journal of Japan Oil Chemists' Society. 47:359-368,388
ISSN:	1884-1996 1341-8327
DOI:	10.5650/jos1996.47.359
Popis:	Gas chromatography-microwave-induced plasma atomic emission spectrometry (GC-MIP-AES) was shown an effective means for determining the empirical formulae of fatty acid (FA), monoacylglycerol (MG) and diacylglycerol (DG) trimethylsilyl (TMS) ester (or ether) derivatives. Negative interference by silicon was demonstrated on an oxygen emission chromatogram. Negative interference and positive oxygen emission intensity decreased with increase in the rate of helium make-up gas flow. At optimal helium make-up gas flow (160mL/min), the oxygen number of the empirical formulae of FA, MG and DG-TMS derivatives were determined within ±0.3 atoms of theoretical formulae, and relative standard deviation (%) was less than 3.1% for FA-TMS, 4.1% for MG-TMS and 4.5% for DG-TMS.
Databáze:	OpenAIRE
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