Abstract：A new catalytic kinetic spectrophotometry method for the determination of trace manganese based on the oxidation reaction of H2O2 with methylthymol blue in Na2B4O7-NaOH medium has been developed. The range of the determination range was 0.20-40.00 μg·L-1. The apparent activation energy and apparent rate constant were 73.24 kJ·mol-1 and 5.62×10-4·s-1, respectively, and the detection limit was 6.4×10-10 g·mL-1. The method has been used to determine trace manganese in Mongolian medicine with satisfactory result.
Key words：Manganese;Catalytic kinetic spectrophotometry method;Methylthymol blue;Mongolian medicine
乌 云，李景峰，嘎日迪. 甲基麝香草酚兰-Mn(Ⅱ)-H2O2催化体系测定痕量锰[J]. 光谱学与光谱分析, 2004, 24(12): 1652-1654.
WU Yun, LI Jing-feng, Garidi. Determination of Trace Manganese in Mongolian Medicine by Methylthymol Blue-Mn(Ⅱ)-H2O2 Catalytic System . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(12): 1652-1654.
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