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矿石分析中以过氧化钠熔融分解样品,经水浸取煮沸后常有过氧化物残留。使用刚玉坩埚熔融,特别是样品中钛、钒含量较高时,这个问题更加明显。在许多光度法及催化波极谱法测定中,微量过氧化物常有明显的干扰影响。文献[1]曾专文讨论OsO_4对过氧化物的催化分解作用。但是OsO_4为贵金属化合物,有挥发性,其蒸气能严重损害眼睛。而变价的锇对测定其它元素的干扰情况也较为复杂。本文探讨常见金属盐对碱溶液中过氧化物的催化分解作用,具有一定的实用价值。
In the ore analysis, the samples were melted and decomposed with sodium peroxide, and peroxide residues were often found after boiling in water. Corundum crucible melting, especially in the sample of titanium, vanadium content is higher, the problem is even more apparent. In many spectrophotometric and catalytic polarographic determination, trace peroxides often have significant disturbing effects. Literature [1] had a special discussion of the catalytic decomposition of OsO_4 peroxide. But OsO_4 is a precious metal compound, volatile, its vapor can seriously damage the eyes. The price of osmium on the determination of other elements of the interference is more complicated. This article discusses the common metal salts of alkali peroxide solution in the catalytic decomposition, has a certain practical value.