Microanalysis of Lithium by Stable Isotope Dilution Method

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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)).
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