摘要
采用原子吸收光谱法研究有机汞和无机汞的吸附作用。改性绿茶的用量为 2 5 mg、在 p H值 =7的溶液中搅拌 6 min,无机汞的吸附率达 95 % ,有机汞的吸附率不大于 5 % ;同等量的改性绿茶在 p H值 =1的溶液中搅拌9min,有机汞的吸附率可达到 90 %以上。 10次重复分离测定 0 .1μg· ml- 1汞溶液 ,测得无机汞、有机汞的检出限分别为 0 .0 6μg· L- 1 和 0 .0 8μg· L- 1 ,相对标准偏差为 8.6 %和 5 .8% ,回收率为 92 .5 %～ 10 5 .3%和 93.8%～ 10 6 .6 %。实验还表明 ,在盐酸浓度分别为 2 .0 mol· L- 1、6 min和 4 .0 mol· L- 1、11min,共存 KCl的量为 10 0mg。
The conditions for the separation of inorganic Hg and organic Hg with modified green tea were studied by cold vapour atomic adsorption spectrometry The 25 mg modified green tea is used 95% of inorganic Hg and no more than 5% organic Hg were adsorbed by the modified green tea at the solution of pH value=7 for 6 min 90% of organic Hg is adsorbed by the modified green tea at the solution of pH value=1 for 9 min The limited detection is 0 06 μg·L -1 to 0 08 μg·L -1 for inorganic Hg and organic Hg respectively with relative standard deviation of 8 65 % and 5 8% and recovery of 92 5%～105 3% and 93 8%～106 6% at the 10 repeats of detections of 0 1 μg·ml -1 Hg solution The inorganic Hg and organic Hg can be quantitatively desorbed at HCl of 2 0 mol·L -1 for 6 min and 2 0 mol·L -1 for 11 min,with 100 mg KCl
出处
《广西科学》
CAS
2002年第4期298-301,共4页
Guangxi Sciences
基金
广西自然科学基金资助项目 (桂科自 0 13 5 0 45 )
