FIELD: analytical chemistry. SUBSTANCE: for analysis of elements of III-V groups of periodic system becoming part of langacites and garnets the mixture is prepared used for sample preparing. Mixture has boron oxide as glass-forming agent and bismuth silicate at the following ratio of components, wt.-%: bismuth silicate 72.12-88.16, and boron oxide 11.84-27.88. EFFECT: increased effectiveness of analysis. 1 tbl
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