Simultaneous spectrophotometric determination of three food dyes by using the first derivative of ratio spectra

被引：101
|
作者：
Nevado, JJB
Cabanillas, CG
Salcedo, AMC
机构：
[1] Department of Analytical Chemistry and Foods Technology, University of Castilla-La Mancha
来源：
TALANTA | 1995年 / 42卷 / 12期
关键词：
food dyes; first derivative spectrophotometry;
D O I：
10.1016/0039-9140(95)01695-3
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Ternary mixtures of colorants E-123 (Amaranth), E-124 (Ponceau 4R) and E-120 (Carminic acid) are resolved by using the first derivative ratio spectrum-zero crossing method without the need for any separation step. Calibration graphs were linear up to 64 mg l(-1) of carminic acid, 32 mg l(-1) of Amaranth and 32 mg l(-1) of Ponceau 4R. The method was applied to different commercial food products and results concordant with high performance liquid chromatography were obtained.
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页码：2043 / 2051
页数：9
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