摘要
研究发现，在磷酸介质中，痕量ＳＣＮ－能灵敏地阻抑溴酸钾氧化甲基绿褪色的指示反应。建立了动力学光度法测定痕量ＳＣＮ－的新方法。本方法的测定范围为０．０～０．２μｇＳＣＮ－／ｍｌ，表观摩尔吸光系数为１．１８×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，灵敏度为４．９３×１０－１０ｇ／ｍｌ，应用于吸烟者与不吸烟者尿中ＳＣＮ－的测定。
An inhibitory spectrophotometric method for the determination of trace SCN- has been established, based on its inhibitory effect on the oxidation of methyl green by potassium bromate. Beer's law is obeyed for SCN- in the range of 0.0～0.2ug/ml. The sensitivity of the method is 4.93×10-10g/ml, the apparent molar absorptivity is 1.18×105 L·mol-1·cm-1. The method has been applied to the determination of SCN- in urine of smokers and nonsmokers with gatisfactory results.
出处
《江西教育学院学报》
1998年第3期30-32,共3页
Journal of Jiangxi Institute of Education
