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本文报道了硒的动力学—荧光测定法。硒可催化次甲蓝(MB)与硫离子的还原反应: 2MB+S~(2-)+2H_2O=2HMB+2OH~-+S 硒存在下可加速上述反应,因为硒与硫形成[S…S.]~(2-)离子,它与次甲蓝的反应明显高于硫离子。反应速度可用产生的荧光测定,反应后形成的无色化合物发生蓝色荧光,而次甲蓝的蓝色对荧光无影响。本法可测0.01～0.4
This paper reports the kinetics of selenium - fluorimetry. Selenium can catalyze the reduction reaction of methylene blue (MB) with sulfur ions: 2MB + S ~ (2 -) + 2H_2O = 2HMB + 2OH ~ - + S Se can speed up the reaction in the presence of selenium and sulfur [S S.] ~ (2-) ions, its reaction with methylene blue was significantly higher than the sulfide ion. The reaction rate can be measured by the fluorescence generated, and the colorless compound formed after the reaction shows blue fluorescence, while the blue of the methylene blue has no effect on the fluorescence. This law can measure 0.01 ~ 0.4