- 作者: --
- 作者服務機構: Department of Chemistry, Faculty of Sciences, Shahid Chamran University, Ahvaz, Iran
- 中文摘要: The catalytic effect of manganese(II) on the oxidation of barium diphenylamine sulfonate (BDAS) with potassium bromate in sulfuric acid was studied. Progress of the reaction was monitored, spectrophotometrically, by measuring absorbance changes at 547.5 nm. A highly sensitive, selective and simple method was accordingly developed for the determination of trace amounts of Mn(II), with no need for a separation or pre-concentration step. Effects of reaction time, concentration of reagents, temperature and ionic strength on the reaction rate were studied. In the optimized conditions, manganese could be determined in a range of 1 to 60 ng mL-1 with a detection limit of 0.2 ng mL-1. The proposed method was successfully applied to the determination of manganese in tea leaves.
- 英文摘要: --
- 中文關鍵字: Manganese determination; Tea leaves; Catalytic kinetic method; Spectrophotometry.
- 英文關鍵字: --