Mutual Influence of Lead and Cadmium Ions on Bismuth Film Electrode
10.11895/j.issn.0253-3820.140420
- VernacularTitle:铅镉重金属离子在铋膜电极上的相互影响
- Author:
Yanchao HAN
;
Ting WEI
;
Jing LI
;
Xiaofang JIA
;
Dongyue LI
;
Xiaowei ZHANG
;
Erkang WANG
- Publication Type:Journal Article
- Keywords:
Lead;
Cadmium;
Bismuth film electrode;
Stripping voltammetry;
Mutual interference
- From:
Chinese Journal of Analytical Chemistry
2014;(10):1539-1543
- CountryChina
- Language:Chinese
-
Abstract:
The mutual influence of lead and cadmium ions on “in-situ” bismuth film coated glassy carbon electrode was demonstrated using different concentration target ions by changing ratio between Pb2+ and Cd2+. It is found that the presence of coexisting ions can have an influence on the detection of target ions. Especially for the detection of Cd2+, the existence of Pb2+ can be beneficial for the deposition of Cd due to the more positive deposition potentials. And the analytical performances of Cd2+and Pb2+ were obtained. The detection limit is 0. 5 μg/L towards Pb2+ with a linear range from 1-80 μg/L using 60 s deposition time. The resulting calibration plots of Cd2+ are linear over the range from 1-25 and 30-200 μg/L with the detection limit of 1 μg/L using 120 s deposition time. The bismuth film was finally employed to determine the Pb2+and Cd2+in real sample with good satisfied results.
