3,3′,5,5′-Tetramethylbenzidme for the colorimetric determination of manganese in water

被引：0
|
作者：
F. Bosch Serrat
机构：
[1] University of Valencia,Department of Analytical Chemistry, Faculty of Chemistry
来源：
Microchimica Acta | 1998年 / 129卷
关键词：
manganese determination; colorimetry; 3,3′,5,5′-tetra-methylbenzidine; drinking water; sea water;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Manganese can be determined by colorimetry with previous oxidation of Mn(II) in a strong basic medium, using 3,3′,5,5′-tetramethylbenzidine as a chromogenic reagent. The molar absorptivity of the reaction product is 3.4 × 104 mol−1l cm−1l, the detection limit 3 ng/ml, the RSD (0.5 mg/l,n = 8) 0.9% and the calibration range (1-cm cells) 0.02–0.8 mg/1 V(V), Cr(VI) and Co(II) are the most significant interferences. The new method was compared with an AAS procedure (air-acetylene flame) with previous solvent extraction and also with a colorimetric method for the determination of manganese in sea and drinking water.
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页码：77 / 80
页数：3
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