摘要
研究了用1-(2,6-二氯-4-硝基苯)-3-(4-硝基苯)-三氮烯(DCNPNPT)分光光度法快速直接测定锌的方法。在表面活性剂TritonX-15的存在下,pH=9.5～10.5的Na2B4O7-NaOH介质中,DCNPNPT与锌( )可生成1∶3的橙黄色络合物。最大吸收波长为445nm,同时在535nm配合物有一最大负吸收,建立以535nm为参比波长,445nm为测定波长的双峰双波长法进行测定,表观摩尔吸光系数可达1.12×105L/(mol·cm)。用拟定的方法测定矿山废水中的锌,与原子吸收法测定的结果十分吻合,结果令人满意。
Studied the trace zinc in zinc water solution is determined by the colour reaction of 1(2,6dichloro4nitrophenyl)3(4nitrophenyl)Triazene (DCNPNPT) with zinc(Ⅱ) directly and rapidly Results show that the yellow complex(1∶3) appears at pH=95～105 buffer solution of Na2B4O7NaOH in the presence of Triton X15, the maximum sbsorption wavelength is at 445nm and the maximum negative absorption is wavelength at 535nm The molar absorptivity is 112×105L/(mol·cm) by using dualwavelength spectrophotometry, which the reference and the determined wave are 535nm and 445nm respectively This method has used to determine Zinc in the Zinc Water solution with Satisfactory results
出处
《中国环境监测》
CAS
CSCD
北大核心
2003年第2期41-43,共3页
Environmental Monitoring in China
