Abstract:
A catalytic-photometric method with a continuous-flow system was developed for the determination of nanogram amounts of manganese. The method is based on its catalytic effect on the oxidative coupling reaction of 3-methyl-2-benzothiazolinone hydrazone with N, N-dimethylaniline to form a blue-violet compound (λmax=590nm) in the presence of hydrogen peroxide. In this reaction, 1, 10-phenanthroline and citrate acted as activators for the catalytic action of manganese(II). Manganese(II) at the 2-30ng ml-1 level can be determined at a rate of 10 samples h-1. The methodcan be applied to the determination of manganese in biological materials.
Keywords:
Catalytic method, flow injection analysis, manganese, 3-methyl-2-benzothiazolinone hydrazone, N,N-dimethylaniline, biological material
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