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Effect of nature and structure of synthetic anionic food dyes on their sorption onto different sorbents: Peculiarities and prospects
Microchemical Journal ( IF 4.8 ) Pub Date : 2018-12-01 , DOI: 10.1016/j.microc.2018.08.022
Tatiana I. Tikhomirova , Gulselem R. Ramazanova , Vladimir V. Apyari

Abstract In this paper, results of a comparative study on sorption of synthetic anionic food dyes onto different sorbents are represented. Five anionic food dyes (3 sulfoazo dyes – E-102, E-110, E-124; a quinophthalone dye – E-104; and a triphenylmethane dye – E-143) and four different sorbents (silica-C16, hypercrosslinked polystyrene, alumina, and polyurethane foam) were examined. Effects of pH, ionic strength were evaluated. Quantitative characteristics of the dye sorption were calculated and effectiveness of different sorbents toward the dyes was assessed. Optical properties of the dyes on the sorbent surface were estimated and compared. Possible mechanisms of the sorption were proposed. Effects of the structure of dyes and the nature of sorbents on efficiency of the sorption were revealed. Based on this study, recommendations regarding sorption isolation and preconcentration of anionic food dyes have been made and a method for direct determination of the dyes by diffuse reflectance spectroscopy on sorbent surface after flow-based preconcentration has been developed.

中文翻译:

合成阴离子食用染料的性质和结构对其吸附在不同吸附剂上的影响:特点和前景

摘要 本文介绍了合成阴离子食用染料在不同吸附剂上的吸附比较研究结果。五种阴离子食用染料(3 种磺基偶氮染料 – E-102、E-110、E-124;一种喹酞酮染料 – E-104;和一种三苯甲烷染料 – E-143)和四种不同的吸附剂(二氧化硅-C16、超交联聚苯乙烯、氧化铝和聚氨酯泡沫)进行了检查。评估了 pH 值、离子强度的影响。计算了染料吸附的定量特性,并评估了不同吸附剂对染料的有效性。对吸附剂表面染料的光学性质进行了评估和比较。提出了可能的吸附机制。揭示了染料的结构和吸附剂的性质对吸附效率的影响。基于这项研究,
更新日期:2018-12-01
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