Abstract

The analytical performance of a spark sampling device “Aspect” (“VMK-Optoelektronika”) is evaluated for steel analysis by atomic emission spectrometry with inductively coupled plasma (ICP-AES). The results of studying the effect of pulse duration, frequency and current of the spark discharge on the character of sample erosion, size and quantity of aerosol particles are presented. The dependences of the analytical signal on the spark duration are obtained and the optimal duration of preliminary sparking is specified. The limit of Cr, Cu, Mn, Mo, Ni, P, Si, and V detection ranges from n x 10 5 to n x 10 2 % wt. The accuracy of the ICP-AES analysis with a spark sampling using standard reference sample showed the good agreement between certified and determined values of analyte concentration.

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