摘要
报道了1-（4-硝基苯基）-3-（5-溴-吡啶）-三氮烯（NPBPDT）的合成及其与镍的显色反应。在Triton X-100的存在下，pH值为11．0的Na2B4O7-NaOH缓冲溶液中，该试剂能与镍发生显色反应，镍与NPBPDT形成摩尔比为1：2型的黄色配合物，450nm处有一最大正吸收峰，在535nm处有一最大负吸收峰。以450nm为参比波长，535nm为测量波长进行双波长测定，表观摩尔吸光系数为2．36×10^5L·mol^-1·cn^-1，镍的质量浓度在0～0．48μg／mL范围内符合比尔定律。用拟定方法测定合金中的微量镍，结果满意。
A novel reagent, 1- （4-nitrophenyl） -3- （5-bromopyridyl） -triazene （ NPBPDT）, was synthesized. In the presence of surfactant, Triton X-100 and in the Na2B4O7 - NaOH medium at pH 11.0, the reagent reacted with nickel ion to form a yellow complex with a molar ratio of 1 ： 2. The absorption spectrum of the complex exhibited two maximum peaks： a positive one at λ450nm and a negative one at λ535nm. The absorbance of the complex was measured at λ535nm using λ450nm, as the reference wavelength. Beers law was obeyed in the range of 0 -0. 48μg/mL with a molar absorptivity 2. 36×10^5 L· mol^-1·cm^-1 The method has been applied to the direct determination of nickel in aluminum alloy with satisfactory results.
出处
《分析测试学报》
CAS
CSCD
北大核心
2006年第1期77-79,共3页
Journal of Instrumental Analysis
基金
丽水学院重点课题(KZ200406)
