Gas Chromatographic Determination of Volatile Fatty Acid
نویسندگان
چکیده
منابع مشابه
Gas-liquid chromatographic determination
A method for the determination of total bile acids in human feces that is suitable for routine application is described and discussed. Bile acids are extracted from freezedried feces with acetic acid and toluene, in the presence of the i?ternal standard 23-nordeoxycholic acid. After saponification of the extract, bile acids and the internal standard are methylated and converted by mild chromic ...
متن کاملGas-Chromatographic Determination of an Antifibrinolytic Drug, E-Aminocaproic Acid
We describe a modified method for assay of t-aminocaproic acid. Serum or cerebrospinal fluid is deproteinized, followed by cation-exchange column-chromatography, and N-trifluoroacetyl-n-butyl derivativesof amino acids are formed and separatedby gas chromatography.Tranexamic acid,a nonproteinamino acid,was used as an internal standard.The assay issensitiveand precise,and results correlate adequa...
متن کاملGas-chromatographic determination of valproic acid in serum without derivatization.
Valproic acid can be determined by gas-chromatography as the free acid after its extraction (1 ) or derivatization to form methyl, butyl, or phenacyl estars (2-4), the latter methods being more complicated for routine analyses. Other procedures, such as enzyme immunoassay (Syva Co., Palo Alto, CA 94304) or fluoroimmunoassay (Miles Inc., Elkhart, IN 46515), which do not require serum extraction,...
متن کاملGas-chromatographic determination of methylmalonic acid in urine and serum.
We describe a gas-chromatographic procedure for determining methylmalonic acid in serum and urine. The sample is acidified and the compound is extracted from it with diethyl ether, derivatized with N,Obis(trimethylsilyl)trifluoroacetamide, and gas chromatographed. Precision and sensitivity of the method were verified by recovery studies and by comparing the resultswith those foran established p...
متن کاملGas chromatographic determination of methoxyacetic and ethoxyacetic acid in urine.
Methoxyacetic acid (MAA) and ethoxyacetic acid (EAA), the major metabolites of, respectively, ethylene glycol monomethyl ether and ethylene glycol monoethyl ether and their acetates, are determined by gas chromatography after extraction from urine and methylation using 2-furoic acid (2-FA) as an internal standard. The mean recoveries (n = 30) from urine of MAA, EAA, and 2-FA are 31.4 +/- 7.0%, ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the agricultural chemical society of Japan
سال: 1962
ISSN: 0002-1407,1883-6844
DOI: 10.1271/nogeikagaku1924.36.181