摘要
研究了在pH=4.0的HAc-NaAc缓冲介质溴化十六烷基三甲基铵溶液中,以Hg2+对催化高碘化钾和碘酸钾氧化对二甲胺基偶氮苯的褪色反应及其动力学条件,测定Hg2+的范围为0-40μg.mL-1,检测限为1.30×10-8g.L-1,采用巯基葡聚糖凝胶(SDG)分离富集,使方法的选择性得到了很大的提高,可用于多种样品中痕量汞的测定,结果满意。
A catalytic dynamics spectrophotometric method for the determination of trace mercury(Ⅱ) was proposed on the Hg(Ⅱ) which can inhibit the catalysis of I^- in the descolorization of IO^-_4 and dimethylaminoazobenzene reaction in buffer medium of HAc-NaAc(pH=4.0)and cetytrimethylaminonium bromide(CTMAB) solution.The coexistingions graph is linear for 0～40?μg/L and detection limits is 1.30×10^(-8)?g/L for Hg(Ⅱ).The coexisting ion can be separated Hg(Ⅱ) in samples by sulfhydryl dextrane gel.The method has been applied to the determination of various samples with satisfactory results.
出处
《济南大学学报（自然科学版）》
CAS
2005年第4期335-337,共3页
Journal of University of Jinan(Science and Technology)
