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目前国内常用的光度法测定微量铜的显色剂有20多种,其中有的选择性差、灵敏度低;有的须分离、萃取、富集,而繁琐、速度不快;有的试剂不普遍,国内尚无生产,难以推广。文献提出PHTTT(3-丙基-5-羟基-5-D-阿拉伯糖型-四羟基丁基-3-四氢噻唑-2-硫酮)作为铜的特效试剂,就选择性来讲,这是分析化学上罕见的,而且国内外尚未生产应用。为此,我们参考了文献所提出的方法进行PHTTT 的合成,并应用于水和废水,铁矿和钢铁中微量铜的测定,结果良好,证实此法具有简易、快速、灵敏等特点。一、PHTTT 的合成测定铜的特效显色剂MHATT(3-甲基-5-羟基-5D-阿拉伯四羟基丁基-3-四氢噻唑-2-硫酮)被用作
At present, there are more than 20 chromogenic agents commonly used in the determination of trace copper in China, some of them have poor selectivity and low sensitivity. Some require separation, extraction and enrichment, which are cumbersome and unpleasant. Some reagents are not common, No production, it is difficult to promote. The literature proposes PHTTT (3-propyl-5-hydroxy-5-D-arabinose-tetrahydroxybutyl-3-tetrahydrothiazole-2-thione) as a copper specific reagent, Analytical chemistry is rare, but not yet produced at home and abroad. Therefore, we refer to the method proposed in the literature for the synthesis of PHTTT and apply it to the determination of trace copper in water, waste water, iron ore and steel with good results. This method is proved to be simple, rapid and sensitive. I. Synthesis Determination of PHTTT The copper-specific developer MHATT (3-methyl-5-hydroxy-5D-arabinotetrahydroxybutyl-3-tetrahydrothiazole-2-thione)