FIELD: spectral analysis. SUBSTANCE: in compliance with method action on sample of low-voltage discharge is conducted with the aid of iron counterelectrode with capacitance of discharge circuit ± and inductance + . Determination of fraction of total mass is performed by analytical pairs of spectral lines C II 657.805-Fe II 658.669 nm and C II 658.285-Fe II 658.669 nm after lapse of 15-20 s from moment of switching on of discharge. EFFECT: improved accuracy of determination. 1 tbl, 1 dwg
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