Preconcentration of total chromium on Dowex 50W-X8 resin loaded with 2-amino-benzenethiol
Application of Dowex 50W-X8 loaded with 2-amino-benzenethiol for preconcentration of total chromium (Cr(VI) and Cr(III)) in water samples and subsequent determination by inductively coupled plasma-atomic emission spectrometry was studied. The reagent 2-amino-benzenethiol loaded onto the resin effectively reduced Cr(VI) to Cr(III) and total chromium (both Cr(VI) and Cr(III)) formed chelate complex with the reagent in the Cr(III) valence state. Experimental parameters such as preconcentration time, solution flow rates, pH, and concentration of the eluent were optimized. The method has been applied for the determination of total chromium in seawater samples in the range of 0.1–200 µg L–1. A detection limit of 0.3 µg L–1 was achieved, and the relative standard deviation was about 5%.
Document Type: Research Article
Affiliations: 1: Environmental & Analytical Chemistry Division, Department of Chemistry, Sri Venkateswara University, Tirupati – 517502, India 2: Department of Environmental Engineering and Management, Chaoyang University of Technology, Taichung County 41349, Taiwan, ROC
Publication date: December 10, 2006