Microanalysis of Lithium by Stable Isotope Dilution Method

Abstract

The lithium contents of three kinds of the aluminium samples were determined by the method of stable isotope dilution. The results obtained are as follows: 99.9% purity aluminium:(5.5±0.3)×10-9 g/g, 99.999% purity aluminium:(3.3±0.2)×10-9 g/g, and zone melted aluminium:(1.7±0.2)×10-8 g/g. The lithium contents in the purified waters and hydrochloric acids used for extraction of lithium from aluminium were also determined to be:(1.335±0.005)×10-10 g/ml(watera)), (2.6±0.2)×10-12 g/ml(waterb)), (2.6±0.2)×10-10 g/ml(hydrochloric acidc))(5.4±0.4)×10-11 g/ml(hydrochloric acidd)), and(2.83±0.05)×10-12g/ml(hydrochloric acide)).