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.
出处
《冶金分析》
EI
CAS
CSCD
北大核心
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)
