DETERMINATION OF SORBIC AND BENZOIC-ACIDS IN FOODS WITH A COPOLYMER (DVB-H) HPLC COLUMN

Authors
CASTELLARI M ENSINI I ARFELLI G SPINABELLI U AMATI A
Citation
M. Castellari et al., DETERMINATION OF SORBIC AND BENZOIC-ACIDS IN FOODS WITH A COPOLYMER (DVB-H) HPLC COLUMN, Industrie alimentari, 36(359), 1997, pp. 606-610
Citations number
19
Categorie Soggetti
Food Science & Tenology
Journal title
Industrie alimentari → ACNP
ISSN journal
0019901X
Volume
36
Issue
359
Year of publication
1997
Pages
606 - 610
Database
ISI
SICI code
0019-901X(1997)36:359<606:DOSABI>2.0.ZU;2-O
Abstract
A method is proposed for the determination of sorbic and benzoic acids in yoghurt, nonalcoholic beverages and fruit juices using a hydrogen sulfonated divinyl benzene-styrene copolymer (DVB-H) HPLC column. An i socratic elution was carried out with 0.01N H2SO4:CH3CN (75:25), setti ng the UV detector at 258 mm (sorbic acid) or 220 nm (benzoic acid). B efore HPLC analysis the samples of yoghurt are treated with potassium ferricyanide(III) and zinc sulfate, while nonalcoholic beverages and f ruit juices are simply diluted, filtered and injected. The method show ed a good precision and accuracy without interferences with other comp onents of the samples.