采用H2O2-HCl分解样品，建立组合吸附材料富集工艺，并详细讨论了组合富集剂的富集条件，通过改进光谱缓冲剂、利用小电极快速曝光技术及研制贵金属光谱分析相板测定系统，提高了仪器信噪比和弱小信号检测能力。方法操作简便、效率高、成本低。检出限(3σ)Au为0.1 ng/g、Pt为0.2 ng/g、Pd为0.1 ng/g，测定国家铂族元素地球化学一级标准物质中的Au、Pt、Pd，结果与标准值相符，12次测定的相对标准偏差(RSD)小于27.1%。方法不仅适合各类矿石中Au、Pt、Pd分析，同样能满足区域地球化学调查样品的分析质量要求，并在不同规模、不同级次、不同采样密度的区域以至全国铂钯地球化学勘查应用中均取得满意成果。
H2O2-HCl was used to decompose the sample, and a separation and enrichment process with combination of adsorption materials was established. The conditions of the enrichment of the combination enrichment agent were discussed in detail. Improved the noise ratio and the weak signal detection capability of the instrument by improving spectral buffer, using small electrode quick exposure technology and developing phase plate measurement system for the spectral analysis of precious metals. The method is simple, high efficiency, and low cost. Detected limit (3σ) Au as 0.1 ng/g, Pt as 0.2 ng/g, and Pd as 0.1 ng/g, the method was applied to measure National PGE geochemistry a standard substance of Au, Pt, Pd, the results are consistent with the standard value, and the relative standard deviation (RSD) of 12-times results is less than 27.1%. The method is suitable for determination of Au, Pt, Pd in various types of ore samples, which serves regional geochemical survey to meet the same quality requirements. And in different sizes, levels and sampling density areas, it can achieve satisfactory results applied to the national platinum palladium geochemical exploration.
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