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[Vapour pressure effect of sample evaporation in blowing powder sample into arc discharge]
1Central Laboratory of Geologic Bureau of Anhui, Hefei 230001, China.
Abstract:
Vapour pressure effect of sample evaporation in blowing powder sample into arc discharge is described in this paper. Since vapour pressure of basic composition of sample in arc is very high, evaporation of this basic composition will be reduced greatly, and the evaporation of impurity elements in the sample are stronger than basic composition, because vapour pressure of impurity elements in arc are lower than the basic composition. This effect is characteristic in sample evaporation during blowing powder sample into arc source. Determination limit of this method is therefore lowered due to the existence of this effect.
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