FIELD: emission spectral analysis. SUBSTANCE: composition includes uranous-uranic oxide to be analyzed and active additive. Used as active additive is bismuth fluoride at the following content of ingredients, mas.%: uranous-ranic oxide, 70-75; bismuth fluoride, 10-15; and carbon powder, the balance. EFFECT: possibility of determination of maximum number of low-volatility components in uranous-uranic oxide at low detection limit. 1 tbl, 3 ex
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