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本文对电极孔穴中汞蒸气的扩散作用进行了初步的研究,并建立了汞的加罩电极分析方法,防止或减少了汞蒸气的扩散损失,获得了较低的检出限10~(-6)％,分析精密度(RSD)达7.3％,一般样品分析结果的相对偏差在30％以内,基本满足了1:5万及1:20万化探样品分析的要求。由于采用的电极规格及缓冲剂与熔珠蒸馏法测金相同,故在测汞之后可连续测金,其检出限为0.044ppm,分析精密度(RSD)为11.24％,可以满足金矿地质普查工作
In this paper, the diffusion of mercury vapor in the pores of the electrode was preliminarily studied, and the mercury-covered electrode analysis method was established to prevent or reduce the diffusion loss of the mercury vapor. A lower detection limit of 10 -6 was obtained )%, The analytical precision (RSD) was 7.3%, and the relative deviation of common sample analysis results was within 30%, basically meeting the requirements of 1: 50000 and 1: 200000 geochemical exploration samples. Due to the same electrode specifications and buffer and gold bead distillation method, gold can be continuously measured after mercury measurement. The detection limit is 0.044ppm and the analytical precision (RSD) is 11.24% Census work