动力学分光光度法测定痕量硫氰酸根的研究

Kinetic Spectrophotometric Determination of Trace Amount of Thiocyano

利用SCN^-对溴酸钾氧化罗丹明B反应的抑制作用。建立了动力学光度法测定痕量SCN^-的新方法。检出限为0.30ng SCN^-/ml,测定范围为0.30～8.3ngSCN^-/ml.应用于吸烟者与不吸烟者尿中SCN^-的测定。结果较为满意。

Based on the inhibitory effect of trace amount of SCN on the oxidation of rhodamine B by potassium bromate,a new kinetic spectrophotometric method for the determination of SCN-has been developed. Beer's law is obeyed for SCN- in the range of 0. 30-8. 3 ng/ml and the detection limit is 3. 0×10-10 g/ml . The method has been applied to the determination of SCN- in urine of smokers and nonsmokers with satisfactory results.