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Determination of Isobutanol in Phosphoric Acid by Gas Chromatography
Author(s) -
Kuo C. H.,
Shih J. S.,
Yeh Y. C.,
Wu S. C.
Publication year - 1981
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.198100016
Subject(s) - isobutanol , chemistry , chromatography , flame ionization detector , phosphoric acid , gas chromatography , extraction (chemistry) , adsorption , alcohol , organic chemistry
Isobutanol in phosphoric acid was detected by gas chromatography with a flame ionization detector. Samples with high content (>100 μg/ml ) of isobutanol were diluted with a n ‐pentanol aqueous solution and the diluted solutions were directly injected into the GC column for the determination of isobutanol. For lower content samples, isobutanol was preconcentrated by vacuum distillation or CCl 4 extraction followed by activated alumina adsorption. In whole GC measurements, n ‐pentanol was used as an internal standard. The flame ionization detector is capable of detecting quantities of isobutanol as small as 5×10 −8 g . With preconcentration, isobutanol at the concentration of 0.4 μg/ml or lower can be determined.