【摘要】 本文合成了５－（２，６－二溴－４－硝基苯偶氮）－８－羟基喹啉。研究了在Ｔｗｅｅｎ－８０增溶下新试剂与Ｚｎ￣（２＋）的显色反应。试验表明，配合物的最大吸收峰位于５４５ｎｍ，表观摩尔吸光系数为６．７ｘ１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），Ｚｎ（Ⅱ）浓度在０～１５μｇ／２５ｍＬ范围内符合比耳定律。该法用于人发中微量锌的直接测定，结果满意。更多还原

【Abstract】 he color reaction of a newly synthe-sized reagent 5-(2,6-dibromo-4-nitropheny-lazo)-8-hydroxyquinoline(DBNZHO)withZn￣(2+) in the presence of Tween-80 was stud-ied.The complex shows ari absorption maxi-mum at 545nm with an apparent molar ab-sorptivity of 6.7 x10￣4 L·mol“·cm￣(-1);Beer’s law is obeyed in the range of 0～15μg/25mL Zn￣(2+). This method has been di-rectly applied to the determination of traceamount of Zn￣(2+) in human hair with satisfac-tory results更多还原