|
|||||
|
|
Chelatometric titration of bismuth with hedta |
|
| Authors: | Nan Z Ren-Qing Y Xu-Zhang Y Zhi-Ren L |
| Institution: | Shanghai Research Institute of Materials, The Ministry of Machine Building Industry, Shanghai, People's Republic of China The Third Factory of Shanghai Reagent Chemicals, Shanghai, People's Republic of China |
| Abstract: | A new chelatometric method for the determination of Bi in bismuth-base alloys, low-melting alloys and reagent-grade bismuth salts is proposed. It is based on the chelation of Bi(III) with HEDTA, which is added in substoichiometric amount in perchloric acid medium to eliminate the interfering side-reactions of olation and oxolation, followed by pH adjustment and titration at pH 2 with Semi-Xylenol Orange as indicator. It is more selective than the classical EDTA method, and the accuracy and precision are enhanced. The coefficient of variation was found to be ˜ 0.1%. |
| Keywords: | To whom correspondence and requests for reprints should be sent Present address: 999 Dong Chang Zhi Lu Shanghai People's Republic of China |
| 本文献已被 ScienceDirect PubMed 等数据库收录！ | |