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1)  Arsenic and Mercury
砷和汞
1.
Determination of Arsenic and Mercury in Food by Microwave Digest-Hydride Generation Atom Fluorescence Spectrometry;
微波消解-氢化物发生原子荧光光度法测定食品中的砷和汞
2.
The Atomic Fluorescence Spectrometric method was used for the rapid determination of arsenic and mercury in cosmetics.
介绍原子荧光光谱法用于化妆品中砷和汞的快速检测方法,用HNO3—H2O2消化样品,选择了最佳测试条件,砷和汞的线性检测范围分别是0—200μg/L和0—20μg/L,方法检出限分别为0。
3.
A systematic investigation was performed concerning the interference of nitrite on the determina- tion of selenium,arsenic and mercury by atomic fluorescence spectrometry(AFS).
研究亚硝酸根对原子荧光测硒、砷和汞的影响。
2)  As and Hg
砷和汞
1.
The Determination of As and Hg in Chinese Medicine by Microwave Digestion and Atomic Fluorescence Spectroscopy;
微波消解-原子荧光光谱法同时测定中成药中的砷和汞
2.
The Method of Atomic Fluorescence to Measure As and Hg in Vegetables Simultaneously;
应用氢化物原子荧光法同时测定蔬菜中的砷和汞
3)  Total Arsenice and Mercury
总砷和汞
4)  mercury and arsenic
汞和砷
5)  trace extratable arsenic and mercury
痕量可萃取砷和汞
1.
A method for the determination of trace extratable arsenic and mercury in textiles by HG-ICP-AES was developed.
建立纺织品中痕量可萃取砷和汞的氢化物发生-电感耦合等离子体原子发射光谱检测法(HG-ICP-AES)。
6)  joint determination of Arsenic and Mercury
砷、汞联测
补充资料:汞(ⅰ)和汞(ⅱ)的转化

从汞的电位图上可看出,hg22+在溶液中不象cu+那样容易歧化。相反,在溶液中hg2+可氧化hg而生成hg22+:

hg2+ + hg = hg22+

k = [hg22+]/[hg2+] =87

表明平衡时,hg2+基本上都转变为hg22+,因此hg(ⅱ)化合物用金属汞还原,即可得到hg(ⅰ)化合物。

由于hg2+ + hg = hg22+反应的平衡常数较大,平衡强烈偏向于生成hg22+的一方,为使hg(ⅰ)转化为hg(ⅱ),即hg22+的歧化反应能够进行,必须降低溶液中hg2+的浓度,例如使之变为某些难溶物或难解离的配合物:

hg22+ + 2oh- = hgo↓ + hg↓ + h2o

hg22+ + s2- = hgs↓ + hg↓

hg22+ + 2cn- = hg(cn)2↓ + hg↓

说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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