摘要
在盐酸或硝酸介质中,利用澳酸盐-溴化物试剂快速破开芳基—Hg和烷基—Hg两种键,将有机汞转变成无机汞,达到由水样中定量回收汞的目的。对还原性物质较多的废水则采用高锰酸钾预先氧化的方法提高消解速率,与常规硫酸-高锰酸钾消解法的可比性良好,适用于天然和废水中总汞的测定。
In hydrochloric acid or nitric acid medium, organic mercury is changed into inorganic mercury by breaking down quickly both aryl-and angalkyl-mercury bonds at room temperature with the bromate-bromide reagent, thus achieving the goal to recover quantitatively total mercury from water samples. The digestion rate of wastewater containing more reducing substance can be raised through pre-oxidation with potassium permanganate. This method is simple, rapid, of few interferences and needn't heating treatment. In the process of digestion, recovery of varied inorganic and organic mercury is more than 92%, and variational coefficients for paralled digestion analysis (n=6) are 3.3% and 0.8% respectively to water samples containing total mercury for 0.3 ppb and 1.0 ppb. Also, the procedure compares favourably with an present sulphuric acidpotassium permanganate method and is suitable for determination of total mercury in natural water and wastewater. The bromate-bromide reagent has lower blank, so that it is not purified and may be used for preservation of water samples.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1991年第3期51-55,共5页
Spectroscopy and Spectral Analysis
