摘要
在ｐＨ９．３的Ｎａ２Ｂ４Ｏ７Ｎａ２ＣＯ３缓冲溶液中，铬（Ⅵ）与十六烷基三甲基溴化铵（ＣＴＭＡＢ）在滴汞电极上吸附还原，峰电位－０．３１Ｖ（ｖｓ．ＳＣＥ）．铬（Ⅵ）在１．９×１０－８２．１×１０－６ｍｏｌ／Ｌ范围内与峰高呈线性关系检出限为７７×１０－９ｍｏｌ／Ｌ用于工业废水中铬的测定。
The polarographic adsorptive wave of chromium(Ⅵ) CTMAB was studied. Its peak potential was -0.31v(vs.SCE). The optimum conditions are in buffer medium of Na 2B 4O 7-Na 2CO 3 at pH9.3, and 0.0008%CTMAB. The changes of peak hight with the concentration of chromium(Ⅵ) are linear in the range of 1.9×10 -8 ￣2.1×10 -6 mol/L, and the detection limit is 7.7×10 -9 mol/L. Chromium(Ⅵ) in waste water samples was determined.
出处
《分析科学学报》
CAS
CSCD
1996年第2期129-132,共4页
Journal of Analytical Science
