【摘要】 本文提出了以新合成的试剂Ｎ－烯丙基－Ｎ＇－（氨基对苯磺酸钠）硫脲（ＡＳＡＴｕ）为显色剂，光度法测定微量铜的新方法。在ｐＨ４．０的弱酸性溶液中，铜（Ⅱ）与ＡＳＡＴｕ形成配合物的最大吸收波长为３乙４ｎｍ，表观摩尔吸光系数ε＿（３３４）＝３．４２×１０￣４。铜量在１０～７０μｇ／２５ｍｌ范围内呈线性关系，相关系数ｒ＝０．９９９９。铜（Ⅱ）和ＡＳＡＴｕ配合物的组成比为１∶３。常见离子除Ｆｅ￣（３＋）、Ａｇ￣＋、Ｓ￣（２－）外，均无干扰。该法简单、灵敏度高，选择性好。对合成样品、食品及生物试样的分析和回收实验，均获得满意的结果。更多还原

【Abstract】 A ncw method of spectrophotometric determination of microamount of copper（Ⅱ）with ASATu is proposed．In HAc-NaAc buffer solution（pH4．0），the maxtum absorption of the complexis at 334nm which is senlected as measuring wavelength． The result indicates that the molar absorpti-vity of the complex is 3．42×10⁴， The linear calibration curve is obtained in the range of 10 to 70 μg Cu／25ml，and its linear regressive equation is y＝-0．0933＋0．2154x（ r＝0．9999）．The composition ratio of coppr（Ⅱ）to ASATu is found to be 1 to 3． Common ions except Fe³⁺ and Ag⁺,have no interference to it．This method proved to be simple， sensitive and selec tive. It is satisfactory to de- termine microamount of copper（Ⅱ）in synthesized samples，hair，food，etc。更多还原