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以聚四氟乙烯（ＰＴＦＥ）悬浮体为氟化剂，悬浮体制样／氟化辅助电热蒸发（ＥＴＶ）／ＩＣＰ－ＡＥＳ直接测定ＴｉＯ２陶瓷粉末中痕量杂质钇；考察了影响基体和待测元素的蒸发过程的各种因素；对比研究了待测元素和基体的氟化蒸发行为；实现了基体和待测元素的预分离，显著降低了基体效应．本法的检出限为０.２６ μｇ／Ｌ，相对偏差为 ３.８％（ｎ＝５， ｃ＝０． ５ ｍｇ／Ｌ）．
The direct determination of trace impurities of yttrium in TiO2 ceramic powder by polytetrafluoroethylene (PTFE) suspension as fluorinating agent, suspension sample preparation / fluorination assisted electrothermal evaporation (ETV) / ICP-AES; Of the evaporation process of various factors; Comparative study of the elements to be tested and the matrix of fluorination evaporation behavior; to achieve the matrix and the pre-separation of the elements to be detected, significantly reducing the matrix effect. The detection limit of this method is 0.26 μg / L with a relative deviation of 3.8% (n = 5, c = 0.5 mg / L).