THE DETERMINATION OF LITHIUM IN ROCKS BY THE METHOD OF STABLE ISOTOPE DILUTION

Journal Article · Sun Jun 01 00:00:00 EDT 1958 · Analytica Chimica Acta (Netherlands)

DOI:https://doi.org/10.1016/S0003-2670(00)87182-2· OSTI ID:4336460

Smales, A A; Webster, R K

A method is described for the determination of lithium in rocks by the method of stable isotope dilution. Abput 50 to 500 mg of the sample are used for each determination. The sample is nuxed with a ~o7im quantity of enriched lithium and is then decomposed by a mixture of hydrofluoric and perchloric acids. The separation of the alkali metals from iron and aluminium is based on the thermal decomposition of the perchlorates. For mass spectrometric measurements it is not necessary to separate the lithium from the other alkali metals. The values obtained for the lithium contents of two standard rocks are: G-1. 21.3 ppm: W-1. 12.6 ppm. Independent determinations. made using both Li/sup 6/ and Li/sup 7/ as tracers. have established that no sigaificant systematic errors are caused by isotopic fractionation. Results obtained for two clay samples containing 0.1 to 0.3% of lithium show good agreement with spectrographic values. (auth)

• Research Organization: Atomic Energy Research Establishment, Harwell, Berks, Eng.
• NSA Number: NSA-12-012259
• OSTI ID: 4336460
• Journal Information: Analytica Chimica Acta (Netherlands), Journal Name: Analytica Chimica Acta (Netherlands) Vol. Vol: 18; ISSN ACACA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALKALI METALS-- ALUMINUM-- DECOMPOSITION-- ENRICHMENT-- HYDROFLUORIC ACID-- IRON-- ISOTOPES-- LITHIUM-- LITHIUM 6-- MASS SPECTROMETERS-- MEASURED VALUES-- MIXING-- PERCHLORIC ACID-- QUALITATIVE ANALYSIS-- QUANTITATIVE ANALYSIS-- QUANTITY RATIO-- ROCKS-- SEPARATION PROCESSES-- STABILITY-- THERMAL RADIATION
CHEMISTRY
CLAYS-- ERRORS-- LITHIUM 7-- RECORDING SYSTEMS-- SPECTROSCOPY-- TRACER TECHNIQUES