The Methods for Determination of Fluorides in the Air of Workplace(GBZ/T 160.36-2004)was used to sample the toxic substance fluoride in the workplace and two methods of ion selective electrode method and ion chromatography method were used to analyze the actual samples,to establish the chromatographic conditions for the determination of hydrogen fluoride in air by water quality column AS19.The results show:in the range of 0.0-2.0μ g/mL,the linearity of ion-selective electrode method was good,R=0.999 5,the precision was 0.49％-1.47％,the recovery rate was 94.9％-103.3％,when the concentration of eluent was 35 mmol/L and the flow rate was 1.0 mUmin,the linearity was good in the range of 0.0-3.0 μ g/mL,r=0.999 8,the precision was 0.35％-1.28％,the recoveries were 95.6％-103.2％.There was no significant difference between the two methods(t=0.52,P=0.31),P＞0.05.Both of the two methods can be used for the determination of hydrogen fluoride in air.In contrast,ion chromatography has the characteristics of simple operation,good selectivity and high efficiency,more suitable for the determination of hydrogen fluoride in air in large quantities.
ion selective electrode methodion chromatographyhydrogen fluorideworkplaceenvironment
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