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Recording apparatus for measuring oxygen absorption
Author(s) -
Lancaster E. B.,
Bitner E. D.,
Beal R. E.
Publication year - 1956
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/bf02638349
Subject(s) - electromotive force , pressure measurement , reproducibility , oxygen , chemistry , materials science , analytical chemistry (journal) , absorption (acoustics) , acoustics , electrical engineering , chromatography , mechanical engineering , composite material , engineering , organic chemistry , physics
Summary Two sensitive but inexpensive electrical circuits have been described which translate change in mercury level in a manometer to an electromotive force of sufficient magnitude so that it may be applied to a standard d.c. potentiometric recorder. The recording manometer, when coupled with a simple closed system containing a small amount of lipid material and oxygen or air, can be adapted to determine continuously the cumulative absorption of oxygen by the oil or fat. The break‐point, a measure of the stability of the sample, may be obtained from the resulting curve. The apparatus has been successfully employed to determine the oxidative stability of hydrogenated soybean oil, and because of the small amount of attention required, it should be readily adaptable to quality control of edible oil and fat products. The recording manometer should be useful also for measuring and recording pressure changes in other systems.