【摘要】 本文提出了用化学修饰硅胶预富集-石墨炉原子吸收法测定水中痕量汞的方法,讨论了二硫氨基甲酸修饰硅胶的制作和方法的测试条件。该法操作简便、快速、灵敏。100ml水样经预富集后,最低检出限为0.l0ng/ml,其相对标准偏差为4.1％。对四种不同水样的测定,回收率在96.5-107.5％之间。更多还原

【Abstract】 The preparation of chemically modified silica gel with dithiocarbamate and the experimental conditions are discussed. This method is simple, rapid and sensitive. The detection limit is 0. 10 ng/ml, when 100 ml of sample solution is taken and the relative standard deviation is 4. 1%. Four water samples are analyzed and the recoveries in the range of 96. 5—107. 5%.更多还原