Spectrographic Determination of Ferroalloys. I : Spectrographic Determination of Microamounts of Arsenic and Antimony in Ferromanganese

概要

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A rapid and accurate method was examined with a quartz spectrograph of medium type to determine arsenic and antimony contained in ferromanganese as impurities. Stable excitation conditions were studied for both block sample and powdered sample, and it was found optimal to excite a mixture of powdered sample and graphite powder by direct current intermittent arc. Silver was introduced into the mixture as the internal standard, and Ag 2309.64A/AsI 2288.12A and Ag 2309.64A/SbI 2311.47A were used as analytical line pairs. By this method arsenic and antimony in ferromanganese were determined with variation coefficients of 5 to 11 per cent and about 6 per cent, respectively.
東北大学の論文