原子吸光法による高合金鋼中の微量鉛の定量

概要

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Since microamount of lead contained in high alloy steel gives bad influence upon efficiency of steel material, its analysis is very important in controlling the efficency.In the conventional determination method of microamount of lead the prior separation such as extraction of coexisting elements and so forth is troublesome and it requires great skill and a long time.After investigation of determination method of microamount lead in high alloy steel by means of atomic absorption spectrophotometry analysis method it was understood that it is possible to make prompt and accurate analysis of microamount lead up to about 5ppm through the underwritten 2 methods.i) Volatilization of Cr as CrO2Cl2 for it has big interferenceii) Calibration of lead amount making calibration curves according to different contents of ironThe required time of this method per 20 samples was about 3 hours i.e. it could be shortened as short as 1/4 or 1/5 of the conventional method.
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