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A method for trace element concentration in the microwave accelerated reaction system MARS 5 is developed. The vapor-phase distillation was used to remove high-purity germanium dioxide matrix as volatile germanium tetrachloride (GeCl 4 ). We specified operating conditions of the microwave system and chose a halogenating agent and its volume. The method of quantitative chemical analysis of germanium dioxide by direct current arc atomic emission spectrometry (DCA AES) was developed. The unit for analysis is equipped with a multichannel spectrum analyzer MAES produced by «VMK-Optoelektronika». We also determined the residual content of germanium in the resulting solutions after vapor-phase distillation. The limits for detection of 46 trace elements in DCA AES analysis of germanium dioxide with preconcentration of trace elements ranged from 0.5 ng/g to 1 μg/g. We carried out validation of the combined procedure using «spike test».

Analysis of germanium dioxide using direct current arc atomic emission spectrometry with preconcentration of trace elements