Spectrochemical Analysis with the Universal Source Unit. III:Determination of Large and Small Amounts of Various Elements in Copper Alloys. I

概要

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Estimation of large or small amount of constituents or impurities in copper or its alloys by spectrochemical analysis is conveniently carried out with the use of merits of discharges of the universal source unit constructed by the authors. In this experiment, determinations of zinc in brass, and phosphorus, lead and iron in bronze are carried out. For estimation of zinc in brass, 3 kinds of discharges are applied for studies on 5 kinds of methods and a suitable method for using of spark-like discharge is established, also, a condition for analysis of phosphorus, lead and iron in bronze with the highest sensitivity by use of an arc-like discharge is established. The working curves obtainable by these discharges are not bent by the self-absorption showing a linear relationship over wide range of the concentration, and a precision of ±2% is obtained except for iron in bronze. The minimum limit of estimation of phosphorus in bronze is 0.015%, those of lead and iron being 0.003%, in which the sensitivity is equaled to that of ordinary arc method.