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Spectrophotometric determination of saturated and alpha, beta‐unsaturated carbonyl in complex systems at a single wavelength
Author(s) -
Jordan Donald E.
Publication year - 1967
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02666778
Subject(s) - absorbance , chemistry , wavelength , ether , distillation , alcohol , petroleum ether , hydrocarbon , analytical chemistry (journal) , organic chemistry , chromatography , extraction (chemistry) , materials science , optoelectronics
The simultaneous determination of trace concentrations of saturated and a,ॆ‐unsaturated carbonyl compounds in simple or complex systems at a single wavelength is described. From the wavelength of maximum absorbance of the alkaline carbonyl‐2,4‐dinitrophenylhydrazone determined at a precise time‐interval, the total carbonyl, percentage of saturated carbonyl, and ॖg C = O/Absorbance unit are then subsequently calculated from previously determined trilinear parameters. These parameters are calculated from the relative response of known concentrations of pure (99.6+%) saturated and a,ॆ ‐unsaturated carbonyl compounds prepared by large‐scale high resolution GLC. The method is applicable in simple or complex systems, such as hydrocarbon, aromatic or aliphatic, oxygenated ester, acid, alcohol or ether systems as well as kerosenes and petroleum distillates.