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以聚四氟乙烯（ＰＴＦＥ）悬浮液为氟化剂，氟化电热蒸发／（ＦＥＴＶ）－ＩＣＰ－ＡＥＳ直接分析粉末二氧化硅．在优化实验条件下，基体Ｓｉ及痕量Ｔｉ均转化为氟化物，并以氟化物形式蒸发．结果表明：高达２０ｇ·Ｌ－１的Ｓｉ对Ｔｉ的分析信号的干扰可以忽略不计；ＳｉＯ２的粒度高达１５４μｍ时，相对蒸发率仍接近１００％，对悬浮体和溶液中基体及待测元素的蒸发特性进行了比较研究，并对石墨炉内发生的热化学反应进行了初步的探索．
Direct analysis of powdered silica with polytetrafluoroethylene (PTFE) suspension as fluorination agent and fluorinated electrothermal evaporation / (FETV) -ICP-AES. Under optimized experimental conditions, the matrix Si and trace Ti are both converted to fluoride and evaporated as fluoride. The results show that the interference of Si with up to 20g · L-1 on the analytical signal of Ti is negligible. The relative evaporation rate is still close to 100% when the particle size of SiO2 is up to 154μm. The evaporation of the matrix and the analyte in the suspension and solution Characteristics of a comparative study, and carried out in the graphite furnace thermo-chemical reaction conducted a preliminary exploration.