离子色谱法测定空气中五氧化二磷

建立了用离子色谱法测定空气中五氧化二磷的方法。空气中五氧化二磷用过氯乙烯滤膜吸附，与水作用生成正磷酸，阴离子分离柱分离，过滤后直接进样分析，时间定性，峰高定量，其五氧化二磷回收率为91．7％-106．5％，在采样体积为100L的条件下，五氧化二磷最低检出质量浓度为0．01mg／m2。本方法前处理简便，分离度好干扰少，分析灵敏度高，化学试剂使用量少，满足环境监测分析要求。

Determination of Phosphorus Pentoxide in Air with Ion Chromatographic Method

This study established of process to determine atmospheric phosphorus pentoxide in air with ion chromatographic method. The phosphorus pentoxide in air was absorbed by perchloroethylene filter, generating orthophosphoric acid after reacting with water. The anion was separated by separation column and the samples were analyzed directly after the filtration. The reaction time was analyzed qualitatively, while peak values were analyzed quantitatively. The recovery rate of phosphorus pentoxide was 91.7% to 106. 5%. When the sampling volume is under 100L, the minimum detection limit of phosphorus pentoxide is 0. O1 mg/ m3. This method has easy pretreatment process, favorable separation rate with little interference, high analysis sensitivity, less chemical reagents dosage, and can meet the requirements of environmental monitoring and analysis.