5,6-二氯苯并噻唑重氮氨基偶氮苯的合成及其与镍的显色反应  

Study on synthesis of 5,6-dichlorbenzothiazole diazoaminoazobenzene and its color reaction with nickel

作　　者：孟双明[1] 樊月琴[1] 郭永[1] 刘永文[1] 王斌[1] 刘慧君[1] 

机构地区：[1]山西大同大学化学与化工学院,山西大同037009

出　　处：《冶金分析》2008年第2期23-26,共4页Metallurgical Analysis

基　　金：山西省自然科学基金(200611025);山西省高校重点扶持学科科研项目(20051025)

摘　　要：合成了新显色试剂5,6-二氯苯并噻唑重氮氨基偶氮苯（DCBTDAA）,并研究了它与镍的显色反应。试验表明,在pH 10.56 Na2B4O7-NaOH缓冲溶液中,TritonX-100存在下,试剂与Ni（Ⅱ）形成2∶1的红色络合物,最大吸收波长为540 nm,表观摩尔吸光系数为2.5×10^5L·mol^-1·cm^-1。在25 mL显色溶液中镍质量在0～15μg范围内遵守比尔定律。用本法测定铝合金标样中的镍,结果与认定值相符。A new chromogenic reagent 5,6-dichlorbenzothiazole diazoaminoazobenzene （DCBTDAA） is synthesized and its color reaction with nickel（Ⅱ） is studied. Results showed that a red complex of DCB- DAA and nickel（Ⅱ） with a reagent： metal ratio of 2 ： 1 was formed in the buffers solution of Na2B4O7- NaOH at pH 10.56 in the presence of Triton X-100. The complex have the maximum absorption at 540 nm with an apparent molar absorptivity of 2.5×10^5 L·mol^-1·cm^-1, Beer＇s law was obeyed in the range of 0-15 μg/25 mL for nickel（Ⅱ）. The method has been applied to the determination of nickel in standard aluminium alloy samples and the results compare favourably with the certified values.

关 键 词：5 6-二氯苯并噻唑重氮氨基偶氮苯 合成 分光光度法 镍 

分 类 号：O657.3[理学—分析化学]