分光光度法测定循环水中微量甲醇

采用高锰酸钾在酸性介质中将甲醇氧化为甲醛,甲醛与变色酸生成紫红色化合物进行比色测定,试验了介质酸度、保持时间、保持温度和波长对测定结果的影响,优化选择了最佳的测定条件,建立了分光光度法测定循环水中微量甲醇的方法。方法测定下限介于0.005~0.008 mg之间,加标回收率在95%~103%之间,相对标准偏差小于2%。

Method of Using Spectropotography to Measure Trace Methanol in Circulating Water

The article mainly aims at the colorimetric assay,using the fact that potassium permanganate oxidizes the methanol into formaldehyde in acid medium,and the formaldehyde can react with chromotropic acid into the amaranth chemical compound.Apart from that,it includes experiments of how the medium acid,time duration,temperature duration and wave length would influence the result of the measurement.Having selected the best determination condition,we set up the method of using spectropotography to measure the sl...