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采用溴化硝酸溶液吸收黄磷尾气,原子荧光光谱法测定As含量。总As在质量浓度0.05~0.30 mg/L范围内进行实验,并对云南某黄磷厂尾气中气态总As含量进行了检测。方法具有良好的线性关系(R2=0.9994),相对标准偏差为2.4%,总As的平均回收率为96.2%~98.2%。方法适用于黄磷尾气中气态总As含量的测定,应用此法测得黄磷厂尾气中气态总As的平均质量浓度为0.901 mg/m3。
Yellow phosphorus tail gas was absorbed by brominated nitric acid solution and As content was determined by atomic fluorescence spectrometry. The total As was tested in the range of 0.05-0.30 mg / L of mass concentration, and the total As content in the gaseous phase of a yellow phosphorus plant in Yunnan was tested. The method has a good linear relationship (R2 = 0.9994), the relative standard deviation of 2.4%, the average recovery of total As was 96.2% ~ 98.2%. The method is suitable for the determination of total As content in the yellow phosphorus tail gas. The average mass concentration of total As in the tail gas from the yellow phosphorus plant measured by this method is 0.901 mg / m3.