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[en] The detection limits of non-controlled microimpurities in graphite powder have been estimated when using a direct current arc, burning in an air or in the controlled atmosphere of argon and oxygen mixture, and the spectrograph of large dispersion STE-1. The detection limits of Ag, Cu, In, Be, Bi, Ni, Ge, Ga, Cr, Pb, Mn, Tl and Au were at the level of 3x10-7 - 6x10-6% mass
Journal
Izvestiya Sibirskogo Otdeleniya Akademii Nauk SSSR, Seriya Khimicheskikh Nauk; ISSN 0002-3426; 
; (no.14); p. 71-73
; (no.14); p. 71-73