水泥窑协同处置固废中硒元素的测定方法探讨

Disposal of Waste in Cement Kilns-Determination Development of Selenium by Atomic Fluorescenece Spectrometry

本文使用原子荧光光谱仪对水泥窑协同处置固废中的硒元素进行了测定方法开发工作.方法中采用了倒王水沸水浴对固体废弃物进行消解溶样,以10％盐酸作为载流液,0.4％氢氧化钾和1.2％硼氢化钾作为还原剂,铁氰化钾作为掩蔽剂,以消除各种离子的干扰.优化了原子荧光光谱仪的测定条件,对标准样品和固废样品进行了检测.方法检出限为0.04μg/L,相对标准偏差为3.0％～10.1％.固废和污泥中加标回收率为82.8％～102.5％.

This artical developed determination method of selenium in solid waste of cement kilns by using atom- ic fluorescence spectrophotometer. It＇s adopted reverse aqua regia and boiling water bath as digestion system, 10%HCI as carrier fluid,0.4%KOH and 1.2%KBH4 as reducing agent,K3[Fe（CN）6] as masking agent to eliminate interference of various ions. Also has optimized instrument conditions,and explored the detection limit,accuracy, precision and recoveries of samples.The detection limit of tiffs method is 0.04μg/L,relative standard deviation is 3.0%-10.1% and recovries in sludge is 82.8%-102.5%.