摘要
试验了溴代十六烷基吡啶、正丁醇、正庚烷、水自制微乳溶液体系中,锌与二溴邻硝基偶氮胂的显色反应,建立了分光光度法测定水中锌的方法。在pH值为3.0的乙酸-乙酸钠缓冲溶液中,锌与试剂形成淡红色配合物,其最大吸收峰位于532 nm波长处,表观摩尔吸光系数ε为1.87×105L/(mol.cm)。在显色液中锌的质量浓度在0.003 mg/L^0.350 mg/L范围内符合比尔定律,检出限为0.001 mg/L,水样中锌测定的RSD为1.3%~2.9%,加标回收率为95.7%~102%。
The color reaction of Dibromo-p-methyl carboxyazo with zinc was studied in micromulsion Cetyl Pyridine Bromide（CPB） with n-butanol and n-heptane and water to establish method for determination of zinc in water by spectrophometry. The pink complex of zinc with solution formed in the medium of HAc-NaAe buffer at pH 3. 0, which maximum absorption wavelength and apparent molar absorptivity are 532 nm and 1.87×10^5L/（mol·cm） respectively. Beer＇s Law was obeyed in the range from 0.003 mg/L to 0.350 mg/L for zinc, the detection limit 0.001 mg/L, the RSDs 1.3 %-2.9% and recoveries 95.7%-102%.
出处
《环境监测管理与技术》
2009年第4期45-47,62,共4页
The Administration and Technique of Environmental Monitoring
基金
教育部重点实验室开放基金资助项目(CPEUKF06-04)
江苏省海洋生物技术重点建设实验室基金资助项目(2005HS001
2005HS010
2006HS020)
江苏省高等学校大学生实践创新训练计划基金资助项目(2008603)
