A sensitive, specific and rapid chromatographic procedure to determine benzoic and sorbic acids in different food products is described. The two antimicrobials were extracted from the food by using a microdialysis probe connected on-line to an HPLC column that allows separation of benzoic and sorbic acids revealed by a UV detector at 228 and 260 nm, respectively. The procedure was linear from 1 to 80 ppm, with a detection limit of 1 ppm for sorbic acid and 2 ppm for benzoic acid. The assay was successfully applied to non-alcoholic beverages and milk based products.
Determination of benzoic and sorbic acids in food by microdialysis sampling coupled with HPLC and UV detection / S. Mannino, M.S. Cosio. - In: ITALIAN JOURNAL OF FOOD SCIENCE. - ISSN 1120-1770. - 8:4(1996), pp. 311-316.
Determination of benzoic and sorbic acids in food by microdialysis sampling coupled with HPLC and UV detection
S. ManninoPrimo
;M.S. CosioUltimo
1996
Abstract
A sensitive, specific and rapid chromatographic procedure to determine benzoic and sorbic acids in different food products is described. The two antimicrobials were extracted from the food by using a microdialysis probe connected on-line to an HPLC column that allows separation of benzoic and sorbic acids revealed by a UV detector at 228 and 260 nm, respectively. The procedure was linear from 1 to 80 ppm, with a detection limit of 1 ppm for sorbic acid and 2 ppm for benzoic acid. The assay was successfully applied to non-alcoholic beverages and milk based products.
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