悬浮体进样/氟化电热蒸发(ETV)/ICP-AES直接测定二氧化钛粉末中痕量钇  

Direct Determination of Trace Impurity Yttrium in Titantium Oxide Powder by Fluorination Assisted ETV-ICP-AES Using Slurry Sampling

作　　者：彭天右[1] 阎琴 胡斌[1] 江祖成[1] 

机构地区：[1]武汉大学化学系,武汉430072

出　　处：《高等学校化学学报》2000年第5期694-697,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金!(批准号:29870522);国家教委博士点基金

摘　　要：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）．By using a polytetrafluorethylene(PTFE) emulsion as fluorinating reagent, a method for fluorinating assisted eletrothermal vaporization (ETV)/ICP-AES direct determination of trace yttrium in TiO2 ceramic powder has been proposed; the various facts which would affect the vaporization process between the matrix and the analyte were studied ; the fluorinating vaporization behavior of the matrix and the analyte both in slurry and in solution were investigated. Based on pre-separation between the matrix and the analyte, the matrix effect was reduced. On the optimum experiment conditions, the detection limit of the present method is 0.26μg/L; and the RSD is 3. 8 % (n=5, c=0.5 mg/L). This method has been applied to directly determinate trace yttrium in two kinds of TiO2 powder without any chemical pretreatment.

关 键 词：悬浮体制样 ICP-AES 痕量杂质 钇 二氧化钛陶瓷 

分 类 号：TQ174.18[化学工程—陶瓷工业] O614.322[化学工程—硅酸盐工业]