反相色层分离电感耦合等离子体原子发射光谱法测定可燃毒物(Gd,U)O_2中12种微量元素

Inductively coupled plasma-atomic emission spectrometric determination of twelve micro elements in burnable poison (Gd,U)O_2 after separation by reversed phase chromatography

采用磷酸三丁酯-聚偏氟乙烯反相分配色层分离法使Al，Ca，Co，Cr，Fe，Mg，Mn，Mo，Ni，Sn，Ti，V，Gd与U分离，用电感耦舍等离子体原子发射光谱法测定Al，Ca，Co，Cr，Fe，Mg，Mn，Mo，Ni，Sn，Ti和V12种元素，大量Gd不干扰。取样100mg时，测定范围为20～640μg／g。方法已用于可燃毒物（Gd，U）O2中上述12种微量元素测定。回收率在94％～110%之间，相对标准偏差（RSD）为4．6%～9．2％。

Al,Ca, Co, Fe, Cr, Mg, Mn, Mo, Ni, Sn, Ti, V and Gd are separated from uranium in burnable poison （Gd, U）O2 sample by reversed phase chromatography with tributyl phosphate-poly vinylidene fluoride, then twelve micro elements, i. e. Al, Ca, Co, Fe, Cr, Mg, Mn, Mo, Ni, Sn, Ti and V are determined by inductively coupled plasma-atomic emission spectrometry. Larger quantities of Gd do not interfere with the determination. When the mass of sample is 100 mg, the determing range is 20 - 640 μg/g. The method has been applied to the determination of above-mentioned twelve micro elements in burnable poison （Gd, U）O2 with addition standard recovery of 94 % - 110 % and relative standard deviation of 4.6 % - 9.2 %.