【摘要】 研究了在硫酸介质中 ,微量铬 (Ⅵ )催化溴酸钾氧化乙基罗丹明B的褪色反应及该指示反应的动力学条件 ,建立了测定痕量铬的新催化动力学分析方法 ,方法的线性范围为 0～ 1 0 μg 2 5ml。检出限为 1.6 6× 10 -6g·L-1。此法可用于电镀废水中铬 (Ⅵ )的测定 ,结果满意更多还原

【Abstract】 A new kinetic photometric method for the determination of Cr(Ⅵ) based on its catalytic effect on the oxidation of ethylrhodamine B by potassium bromate was reparted. The calibration curve was linear for the range 0～1.0μg/25ml, and the detection limit is 1.66×10 -6g·L -1. The method has been used in the determination of traces of Cr(Ⅵ) in electroplating waste water, with satisfactory results.更多还原