摘要
用停流动力学分析技术研究了H2SO4介质中苯酚抑制BrO-3氧化丁基罗丹明B褪色的反应,并探讨了其反应机理;基于苯酚对该反应诱导期的影响作用,建立了停流-抑制动力学褪色光度法测定痕量苯酚的新方法.该方法测定苯酚的检出限为1.3×10-9 g/L,线性范围为0.3～15.0 μg/L,11次测定苯酚(5.0 μg/L)的相对标准偏差为2.1%;用于测定河水和工业废水样品中的痕量苯酚,结果满意.
The decolorizing reaction based on incubation effect of phenol to oxidation butyl rhodamine B with potassium bromate has been investigated in sulfuric acid medium by stop-flow technique. The reaction mechanism has been discussed. A highly sensitive and simple inhibitory kinetic spectrophotometric method for the determination of trace phenol based on its effect on incubation period of the reaction was proposed. The detection limit was 1.3×10^-9 g/L and linear range was 0.3～15.0μg/L and the relative standard deviation （5.0μg/L, n=11） was 2. 1% for phenol. The method has been applied to determining of trace phenol in samples of river waters and industrial wastewater with satisfactory results.
出处
《浙江师范大学学报（自然科学版）》
CAS
2005年第3期293-296,共4页
Journal of Zhejiang Normal University:Natural Sciences
基金
浙江省分析测试基金资助项目(03099)
关键词
抑制动力学光度法
停流-动力学分析
丁基罗丹明B
苯酚
inhibitory kinetic spectrofluorometry
stop-flow kinetic analysis
butyl Rhodamine B
pheno
