Tobacco Science & Technology, 2011, 1, p. 56-59., ISSN.1002-0861
Simultaneous determination of Cr3+, Al3+ and Fe3+ in tobacco with artificial neural networks by catalytic kinetic spectrophotometry
1. School of Biology and Chemical Engineering, Anhui Polytechnic University, Wuhu 241000, Anhui, P.R. China; 2. Wuhu Cigarette Factory, Wuhu 241000, Anhui, P.R. China
A method for simultaneous determining of chromium (III), aluminum (III) and iron (III) by catalytic kinetic spectrophotometry was realized based on the principle that Cr (III) Al (III) and Fe (III) catalyzing simultaneously the reaction of brilliant cresyl blue with hydrogen peroxide in a CH3COONa-CH3COOH medium. It was found that the catalytic effects of the three metal ions were not synergistic. The recoveries of the method ranged from 97.9% to 101.9% with the RSDs of 2.7% to 4.2% and relative errors of -4.3% to 4.7%.