By using a polytetrafluorethylene (PTFE) emulsion as fluorinating reagent , a method for fluorinating assisted electrothermal vaporization (ETV)/ICP AES direct determination of trace yttrium in Al 2O 3 ceramic powder has been proposed.

• 报道了以聚四氟乙烯 ( PTFE)悬浮体为氟化剂 ,悬浮体制样 /氟化辅助电热蒸发 ( ETV) /ICP- AES直接测定两种 Al2 O3粉末样品中痕量杂质钇。