ICP-AES法测定陶瓷UO_2芯块粉末标准物质中Al、Ba、Co、Ta、Ti和V

DETERMINATION OF TRACE ELEMENTS IN CERAMIC URANIUM DIOXIDE PELLETS POWDERS CRMs BY ICP AES

采用２３７季铵萃淋树脂和萃取色谱分离技术，在６．５ｍｏｌ／ＬＨＮＯ３介质中定量分离陶瓷ＵＯ２芯块粉末标准物质中铀与待测杂质元素。用ＩＣＰ直读光谱仪同时测定流出液中Ａｌ、Ｂａ、Ｃｏ、Ｔａ、Ｔｉ和Ｖ。分析结果均在标准值的置信区间内，相对标准偏差ｓｒ＜７．５％。取样３００ｍｇ时，测定下限为（０．０１６—０．２５０）×１０－６。

The 237 quaternary ammonium extraction resin chromatography is used to separation 6 trace elements in ceramic uranium dioxide pellets powders,which are used as certified reference materials (CRMs).The sample is dissolved in 6 5 mol/L HNO 3 and uranium is separated by chromatographic column.The 6 trace elements Al,Ba ,Co,Ta,Ti and V contained in the elutriant are determined using ICP directly reading spectrometer.For a 300 mg sample,the lowest determinable concentration of impurities in ceramic UO 2 pellets powders CRMs is (0 016—0 250)×10 -6 .The relative standard deviation is less than 7 5%.The proposed method provides excellent and accurate analytical data for the ceramic UO 2 pellets powders samples (CRMs).