摘要
利用Cu(Ⅱ)与铜试剂[N(C2H5)2CS2Na.3H2O]反应生成鳌合物沉淀的同时,能将痕量Hg(Ⅱ)共同沉淀出来的特性,将Hg(Ⅱ)分离富集,用电感耦合等离子体光谱仪测定其含量。本方法采用去离子水加Hg标准溶液、Cu[表示Hg(Ⅱ)和Cu(Ⅱ)]和铜试剂(DDTC)进行实验,分别加入不同量的Cu和DDTC,测定加入的Hg标准的含量,最终确定最佳Cu和DDTC加入量。另外,在测定时,对分析线的选择、背景的扣除进行试验,恰当处理。水溶液体积由200 mL浓缩至5 mL,富集40倍后,Hg的最低检测浓度可达0.1μg/L,RSD<10%(n=12)。
Making use of the characteristic of depositing Hg （ Ⅱ ） when Cu （ Ⅱ ） reacts with DDTC [ N （ C2 H5 ） 2 CS2 Na. 3 H2O ] and forms chelate compound in water, Hg（ Ⅱ ） can be separated and enriched. Then the amount of Hg is detected by ICP-AES. In the paper the test is with deionized water, Hg standard solution, Cu [ representing Cu （ Ⅱ ） and Hg （ Ⅱ ） ] and DDTC. By adding different amount of Cu and DDTC, the added value of Fig standard is detected, and at last the fittest amount of Cu and DDTC are determined. Additionally,when Hg is determined,the sutable analyzing line is selected and background is deducted in out tests. The volume of water solution is condensed from 200 mL to 5 mL. After enriched 40 times,the lowest detecting concentration of Hg is 0. 1 μg/L,RSD 〈 10% （n = 12）.
出处
《现代化工》
CAS
CSCD
北大核心
2010年第11期90-92,共3页
Modern Chemical Industry
