在自然界中硒与碲经常共生,因此考虑在同一份取样中进行硒与碲连测比较合理。利用砷作共沉剂、在1∶1盐酸介质中用卑磷酸盐将硒、碲还原沉淀富集,可与伴生杂质分离。此时金和汞也被定量沉淀下来。若采用焙烧法分解试样,可将大量汞挥散除去。只有金与微量硒、碲的分离,手续比较冗长。 In nature, selenium and tellurium often coexist, so consider the same sample for the selenium and tellurium even more reasonable. The use of arsenic as a co-settling agent, in 1: 1 hydrochloric acid medium with hibiscus salt selenium, tellurium reduction precipitation enrichment, with accompanying impurities separation. Gold and mercury were also settled down at this time. If calcined decomposition of the sample, a large amount of mercury evaporated to remove. Only gold and trace selenium, tellurium separation, the procedure is more lengthy.