离子色谱法和离子选择电极法测定固定污染源废气中气态氟对比研究

Comparative Study on Determination of Gaseous Fluorine in Waste Gas of Fixed Pollution Source by Ion Chromatography and Ion Selective Electrode

分别采用离子色谱法和离子选择电极法测定固定污染源废气中的气态氟,通过检出限、精密度、准确度比较2种测试方法的优缺点。结果表明:2种方法均能满足对应标准方法的要求,离子选择电极法检出限更低,对于低浓度样品,离子选择电极法精密度、准确度均优于离子色谱法,对于高浓度样品,离子选择电极法和离子色谱法无显著差异。

Ion chromatography and ion selective electrode were used to determine gaseous fluorine in the waste gas of fixed pollution sources.The advantages and disadvantages of the two methods were compared through detection limit,precision and accuracy.The results show that the two methods can meet testing requirements,but the ion-selective electrode method has a low detection limit.For low concentration samples,ion-selective electrode method is better than the accuracy of ion chromatography.For high concentration samples,ion-selective electrode method and ion chromatography have no significant differences.