منابع مشابه
Evaluation of analyte protectants to improve gas chromatographic analysis of pesticides.
A common problem in gas chromatography (GC) applications is the analyte losses and/or peak tailing due to undesired interactions with active sites in the inlet and column. Analytes that give poor peak shapes or degrade have higher detection limits, are more difficult to identify and integrate, and are more prone to interferences than stable analytes that give narrow peaks. For susceptible analy...
متن کاملMultiresidue analysis of pesticides in fruits and vegetables using solid-phase extraction and gas chromatographic methods.
A new extraction and cleanup procedure with gas chromatography was developed for the sensitive determination of acephate, dimethoate, malathion, diazinon, quinalphos, chlorpyrifos, profenofos, alpha-endosulfan, beta-endosulfan, chlorothalonil and carbaryl using 1-chloro-4-fluorobenzene as an internal standard in fruits and vegetables. Several extracting and eluting solvents for solid-phase extr...
متن کاملGas chromatographic analysis of conjugated linoleic acids
The aim was to determine the conjugated linoleic acids in beef with GC-FID. Perfect separation of all of the isomers cannot be achieved, though conjugated linoleic acid isomers proved to be separable from the other fatty acids that are present in beef in a significant amount related to conjugated linoleic acids. Lipid-extraction was carried out with n-hexane/i-propanol, giving 6.8 percent highe...
متن کاملGas-liquid chromatographic analysis of urinary steroids.
A method for gas-liquid chromatographic separation and quantitation of urinary steroid metabolites is described. A normal reference range has been established and classic examples of urinary steroid profiles of the major steroid disorders are given.
متن کاملPart II. A Portable Miniaturized Metabolic Gas Analysis System
Introduction Previously we proposed construction of a miniaturized metabolic monitor that could be taken aboard the space station to monitor the physiological response of the body in a microgravity environment. The prototype consisted of an on airway non-dispersive infrared (NDIR) CO2 sensor and a luminescencequenching O2 sensor to measure gas concentrations, and differential pressure ports to ...
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ژورنال
عنوان ژورنال: Journal of the agricultural chemical society of Japan
سال: 1966
ISSN: 0002-1407,1883-6844
DOI: 10.1271/nogeikagaku1924.40.11_394