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地球化探样中痕量银(0.0X ppm)不经分离富集直接测定是困难的。现有文献多采用分离富集处理后用无火焰原子吸收测定。采用基体改进剂手段,但未见用于任何样品中痕量银的分析。本文应用基体改进剂技术研究了痕量银在石墨炉原子吸收测定中的原子化条件和基体的干扰及排除。试验了用铱、钯、铂等作为基体改进剂,当加入15微克铱时,灰化温度可提高至1000℃。拟定了加入基体改进剂后的直接测定程序。本法灵敏度为4.5×10~(-12)g/l％,测定
Direct determination of trace silver (0.0X ppm) in geochemical samples without separation and enrichment is difficult. Existing literature and more use of separation and enrichment after treatment with flame atomic absorption spectrometry. The use of matrix modifier means, but not for any sample trace silver analysis. In this paper, the use of matrix modifier technology to study the trace silver in graphite furnace atomic absorption spectrometry conditions and matrix interference and elimination. Experiments with iridium, palladium, platinum and other substrates as a modifier, when 15 micrograms of iridium, the ashing temperature can be increased to 1000 ℃. The direct determination of the addition of matrix modifiers was developed. The sensitivity of this method is 4.5 × 10 ~ (-12) g / l%, measured