1) 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)。
2) trace mercury and arsenic
痕量汞、砷
3) trace As and Sn
痕量砷和锡
1.
Determination of trace As and Sn in pure tungsten powder by graphite furnace atomic spectrophotometry;
石墨炉原子吸收光谱法测定纯钨粉中痕量砷和锡
4) trace arsenic and selenium
痕量砷和硒
1.
Determination of trace arsenic and selenium in chromium-nickel alloy steel by graphite furnace atomic absorption spectrophotometry;
塞曼效应石墨炉原子吸收法测定铬镍钢中痕量砷和硒
5) Extract with benzene
苯萃取可溶性砷
6) 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。
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。
参考词条