Bulletin of the Society of Sea Water Science, Japan
Online ISSN : 2185-9213
Print ISSN : 0369-4550
ISSN-L : 0369-4550
High-Performance Liquid Chromatography for Tartrazine, Sunset Yellow and Sorbic Acid in Pickles following Ion-Pair Extraction with Tri-n-octylamine
Takehiro KOJIMAKenji YAMAOKAAkira SAKATAYasumasa SHIGETOMI
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1994 Volume 48 Issue 6 Pages 421-426

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Abstract

Dyes in pickles are extracted from aqueous solutions as ion-pairs with a series of amine such as tri-n-octylamine (TOA), tri-iso-octylamine (TiOA), di-n-octylamine (DOA), and tri-n-hexylamine (THA) in chloroform. The influences of pH and the concentrations of sodium chloride and the amines on the extraction were examined. The equilibrium is attained in 2 min or less. The extractability of amines for tartrazine was in the order TOA>THA>DOA>TiOA. Tartrazine, sunset yellow and sorbic acid are separated from pickles by elution with aqueous ammonia system. The extract was purified by ion-pair extraction with TOA, and the dyes and sorbic acids were analyzed by high-performance liquid chromatography. The detection limits were approximetely 2.0, 1.0 and 0.5 μg cm-3 for tartrazine, sunset yellow, and sorbic acid, respectively.

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