可变误差多面体法测定铝合金中钇及稀土总量

DETERMINATION OF YTTRIUM AND TOTAL AMOUNT OF RARE EARTHS IN ALLOY BY FLEXIBLE TOLERANCE SIMPLEX METHOD

本文把计算机和分光光度法结合起来,根据DBC-偶氮氯膦与稀土元素形成有色配合物的吸光系数之间的差异,把十五个稀土元素分为六个组分(加上显色剂共七个组分),利用可变误差多面体法对数据进行处理,以期解决铝合金中钇及稀土总量的测定问题。实验结果令人满意。

Determination of yttrium and total amount of rare earths in the presence of all rare earth elements, in the alloy of aluminium and rare earths, is one of the difficult problem in analytical chemistry. But it can be solved with acceptable error by classifying all rare earths into five subgroups according to their properties of absorbing optical beam,and then processing the data with flexible tolerance simplex method. Using different units of concentration for reagent and rare earths the computer time used can be reduced significantly.Increasing concentration of rare earths in the solution results in the increase of accuracy.