Determination of rare earth elements in plant food by microwave digestion inductively coupled plasma-MS spectrometry
A method for determination of 45Sc,89Y,139La,140Ce,141Pr,146Nd,147Sm,153Eu,157Gd,159Tb,163Dy,165Ho,166Er,169Tm,172Yb,175Lu in plant food by ICP-MS was established.These elements were detected simultaneously after the samples digested by microwave digestion with 101Ru,115In,185Re as internal standard elements.The detection limits of these elements range from 0.56 ng/L to 16 ng/L,linear correlation r≥0.999.The precision was RSD7.0%,and recoveries of samples were of the range from 82% to 112%.The results were fine in different kinds of plant food.