原子吸收法测定放射性废物固化体中模拟核素钌

DETERMINATION OF RUTHENIUM IN SOLIDIFIED RADIOACTIVE WASTE BY FLAME ATOMIC ABSORPTION SPECTROSCOPY

研究了火焰原子吸收法测定放射性废物固化体浸出液中模拟核素钌的测定方法。对一些主要共存元素Ｓｉ、Ｆｅ、Ａｌ、Ｃａ、Ｍｇ对Ｒｕ测量的干扰和消除以及测定体系进行了研究。以１．２ｍｏｌ／ＬＨＣｌ＋０．０６ｍｏｌ／ＬＨ２ＳＯ４作为测定体系，具有灵敏度高，测量稳定的特点，测量回收率在９９％１０１％之间。

A method is described for the determination of ruthenium in solidified radioactive waste by flame atomic absorption spectrometry. The interferences of main coexisting elements Si,Fe,Al,Ca, Mg and their elimination as well as the enhancement effect of spectrochemical buffers were studied. The greatest and stablest absorbance was obtained when the concentrations were 1.2 mol/L hydrochloric acid and 0.06 mol/L sulphuric acid. The present method is simple, quick, reliable and reproducible. Its recovery is 99% to 101%.