摘要
合成了显色剂1-偶氮苯-3-（3-硝基-5-氯-2-吡啶）-三氮烯（ABNCPyT）,并用元素分析法和红外光谱法对其分子结构作了鉴定。研究了ABNCPyT与汞的显色反应,在pH 10.5的Na2B4O7-NaOH缓冲溶液中和聚氧乙烯烷基酚（Triton X-100）表面活性剂存在下,试剂与汞（Ⅱ）生成4∶1型红色配合物。配合物的最大吸收峰位于525 nm,表观摩尔吸光率为1.92×10^5L·mol^-1·cm^-1。汞（Ⅱ）质量浓度在600μg·L^-1以内符合比耳定律。用拟定方法测定废水中微量汞,所得结果与原子吸收光谱法的结果一致,测得其相对标准偏差（n=5）≤2.5%,方法的回收率在97.5%-103.0%。
A new chromogenic reagent, 1-azobenzene-3-（3-nitro-5-chloro-2-pyridyl）-triazene （abbreviated as ABNCPyT） was synthesized and its molecular structure was identified by elementary analysis and IR spectrometry. It was found that in a borate buffer medium of pH 10. 5 and in the presence of surfactant Triton X-100, a red colored coordination complex was formed between ABNCPyT and Hg（ Ⅱ ） with mole ratio （R to Hg） of 4 to 1. Apparent molar absorptivity of the complex was found to be 1.92×10^5L·mol^-1·cm^-1 , at the wavelength of its absorption maximum 525 nm. Beer＇s law was kept in the range within 600 μg·L^-1. The proposed method has been applied the determination of mercury in samples of waste water, giving results in consistency with the results obtained by AAS method. Values of RSD （n=5） of the method was found to be 42. 5%. Recovery was also tested and values obtained were in the range of 97.5% to 103.0%.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2008年第2期146-148,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
丽水学院重点课题(KZ04006)
作者简介
张春牛（1966-），男，浙江金华人，高级实验师，主要从事有机合成及分析测试研究。
