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Analysis of nitrate and nitrite in foodstuffs: A critical review
Author(s) -
Usher Cyril D.,
Telling Geoffrey M.
Publication year - 1975
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740261122
Subject(s) - nitrite , nitrate , chemistry , amperometry , ion chromatography , cadmium , chromatography , extraction (chemistry) , environmental chemistry , electrode , organic chemistry , electrochemistry
A general review is presented of published methods for the determination of nitrate and nitrite levels in foodstuffs especially meat. Published methods show wide variations in techniques for extraction, clean‐up (clearing) of extracts and final determinative steps and these are critically compared. The effect of interferences due to the presence of ascorbate, sulphite and phosphate together with the formation of a “meat blank” when nitrate is reduced to nitrite with spongy cadmium are discussed. Newer techniques based on the use of ion selective electrodes and automated techniques are outlined and the application of techniques such as amperometry, liquid chromatography, ion exchange and spectrophotometry are listed.