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DETERMINATION OF INDIGO IN DYEBATHS BY FLOW INJECTION ANALYSIS AND REDOX TITRATIONS

机译：流动注射分析和氧化还原滴定法测定染料中的靛蓝。

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摘要

FIA of indigo was very effective in determining indigo concentration. It provided a means to obtain reproducible results in laboratory dyeing runs that simulated continuous indigo dyeing on a range. Off-line titration of the dyebath provided values for indigo and hydrosulfite concentrations at five-minute intervals. Titration values for indigo were noisier than corresponding FIA values. Both methods provided an acceptable means for tracking indigo concentration with reasonable response time during a dyeing operation. Relative to titration, FIA provides a more automated and more rapid means of measuring indigo concentration without risking exposure of the reduced indigo to atmospheric oxygen. Although it was not investigated in this work, it is anticipated that FIA would have to be modified in order to remove the interference from a sulfur dye that might be applied before the indigo on a commercial range.
机译：靛蓝的FIA对测定靛蓝浓度非常有效。它提供了一种在实验室染色运行中获得可再现结果的方法，该运行模拟了一定范围内的连续靛蓝染色。脱色浴的离线滴定以5分钟为间隔提供了靛蓝和亚硫酸氢盐的浓度值。靛蓝的滴定值比相应的FIA值嘈杂。两种方法都提供了一种可接受的方法，可在染色操作期间以合理的响应时间跟踪靛蓝浓度。相对于滴定，FIA提供了一种更自动化，更快速的测量靛蓝浓度的方法，而没有将还原的靛蓝暴露于大气氧的风险。尽管在这项工作中未进行调查，但可以预期必须对FIA进行修改，以消除可能会在商业范围的靛蓝之前应用的硫染料的干扰。

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