Quantitative Endogenous Formate Analysis in Plasma Using Headspace Gas Chromatography Without a Headspace Analyzer
نویسندگان
چکیده
منابع مشابه
Quantitative endogenous formate analysis in plasma using headspace gas chromatography without a headspace analyzer.
The objective was to develop a simple routine method for quantitative measurement of endogenous formic acid in plasma and whole blood using headspace gas chromatography-flame ionization detection. (GC-FID). Two-hundred microliters of sample was placed in a 1-mL glass vial. Fifty microliters of aqueous ethanol (10%) was added as an internal standard and a derivatizing agent. Ethylformate formati...
متن کاملHeadspace Gas Chromatography
possibility of very selective separations that depend on the geometry of the molecules to be separated rather than the more generalized solubility mechanisms acting in gas}liquid chromatography. It should be theoretically possible to design adsorbents for particular separations. In the branch of liquid chromatography known as afRnity chromatography, for example, it is already possible to manufa...
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Four of the major HS-GC analyses that are typically performed at breweries are described here (Table 1). The first, and most important, is monitoring for vicinal diketones (VDK) in the beer, which include 2,3-butanedione (diacetyl) and 2,3-pentanedione. VDK are considered extremely important since they are known to affect the taste of the beer. These components produce a butterlike flavor and a...
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A rapid headspace-gas chromatography (HS-GC) method was developed for the analysis of ethylene glycol and propylene glycol in plasma and serum specimens using 1,3-propanediol as the internal standard. The method employed a single-step derivitization using phenylboronic acid, was linear to 200 mg/dL and had a lower limit of quantitation of 1 mg/dL suitable for clinical analyses. The analytical m...
متن کاملComparison between dynamic headspace and headspace solid-phase microextraction for gas chromatography of BTEX in urine.
The aim of this study was to compare two extraction procedures: dynamic headspace-purge and trap (PT) and headspace solid-phase microextraction (HS-SPME) for gas chromatographic determination of benzene, toluene, ethylbenzene, and isomeric xylenes (BTEX) in urine with photoionization (PID) and mass spectrometric (MS) detection, respectively. Both methods showed linearity in the range of interes...
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ژورنال
عنوان ژورنال: Journal of Analytical Toxicology
سال: 2007
ISSN: 0146-4760,1945-2403
DOI: 10.1093/jat/31.6.342