Capillary electrophoresis determination of two reactive dyes: monitoring of activation and hydrolysis in different alkali media.

Alma L Revilla, Hana Chromá-Keull, Josef Havel
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Abstract

HPLC often meets with difficulty in analyzing reactive dyes, their activation, and posterior hydrolysis. In this work, capillary electrophoresis methodology for two reactive dyes, C.I. Reactive Black 5 and C.I. Reactive Red 198, was studied. The methods developed permit the separation and detection of these reactive dyes and their major hydrolytic products. These methods can be used successfully for the optimization of these dye syntheses, purification process, formulation, and also to monitor effluents and dye-bath mixtures and extrapolation to similar compounds. Simple background electrolyte systems, such as 10 mM phosphate or 0.65% hydroxypropylmethylcellulose in 40 mM acetate, were used to follow the hydrolysis mechanism and process in the two different alkali media studied.

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毛细管电泳法测定两种活性染料在不同碱介质中的活化和水解。
高效液相色谱法在分析活性染料、活性染料的活化和后水解过程中经常遇到困难。本文研究了两种活性染料C.I.活性黑5和C.I.活性红198的毛细管电泳方法。所开发的方法允许分离和检测这些活性染料及其主要水解产物。这些方法可以成功地用于这些染料合成、纯化过程、配方的优化,也可以用于监测废水和染料浴混合物,并推断出类似的化合物。采用简单的背景电解质体系,如10 mM磷酸盐或0.65%羟丙基甲基纤维素在40 mM醋酸盐中,遵循两种不同碱介质的水解机理和过程。
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