For further improvement of reproducibility of intensity ratios of constituent vs. aluminum lines, noted when argon atmospheres were used in the spark excitation of aluminum alloy (Alcoa 24S) chip compacts, a study was made of the effects of the following factors: chip size, carbon bonding, shape of pellet, sample pellet to sample pellet and to carbon electrode forms. The results show that unbonded, flat tipped pellets to carbon counter-electrodes produce the most desirable combination. Chip size does not have a significant influence on the results.
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