Title: ABSOLUTE ISOTOPIC ABUNDANCE RATIO AND THE ATOMIC WEIGHT OF CHLORINE
Abstract: An absolute value is obtained for the isotopic abundance ratio of natural chlorine by surface emission mass spectrometry and by the use of calibration samples of known isotopic composition prepared from nearly pure separated chlorine isotopes. Mass spectrometric data obtained on two instruments result in a absolute value for the ratio, Previous workers have observed no variation in isotopic abundance greater than 0·1 per cent of the isotope ratio among naturally occurring materials and minerals. The calculated atomic weight of chlorine on the recently proposed unified physical and chemical atomic weight scale (12C = 12) is The indicated uncertainties are over-all limits of error based on 95 per cent confidence limits for the mean and on allowances for effects of known sources of possible systematic error. Mass spectrometric determinations of the atomic weights of chlorine and silver give a combining weight ratio, Cl/Ag = 0·3286671.
Publication Year: 1963
Publication Date: 1963-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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Cited By Count: 10
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