Simultaneous Spectrophotometric Determination of Zinc, Cadmiumand Mercury with Hybrid Linear Analysis
- VernacularTitle:混合线性分析-分光光度法同时测定微量锌、镉、汞
- Author:
Xiaojia WANG
;
Baoningv WANG
- Publication Type:Journal Article
- From:
Chinese Journal of Analytical Chemistry
2001;29(4):396-399
- CountryChina
- Language:Chinese
-
Abstract:
A new method for simultaneous spectrophotometric determination of Zn, Cd and Hg using 2-(5-Br-2-pyridylazo)-5-diethylaminophenol as the color developing reagent was proposed. The absorption spectra of these three complexes have similar features with severe overlap in visible spectral range. For resolving these spectra, hybrid linear analysis was used, and the pure spectrum of each component was obtained from the calibration mixtures by least squares method. The effects of reaction condition, selection of wavelengths, determination of pure spectrum and additivity of absorbances etc. on the determination were discussed. The proposed method offers the advantages of simple, rapid, and accuracy. It has been successfully applied to the simultaneous determination of Zn, Cd and Hg in synthetic sample. A comparison was also made with the partial least squares method.
