铁盐增敏-石墨炉原子吸收法测定岩石样品中超痕量金

Determination of Ultra Trace Gold in Rock Samples by Graphite Furnace Atomic Absorption Spectrometry with Molysite Increasing Sensitivity

在解脱测定液中引入三价铁盐，并在其增敏下，使用石墨炉原子吸收法测定岩石样品中的超痕量金．方法检出限为0．02ng／g，精密度（RSD，n=12）为5％～8％．方法准确可靠．进行国家一级标样物质的测试，结果符合质量要求，与标准值吻合．

Molysite is introduced into releasing agent and with the increasing sensitivity of molysite , a method for determination of ultra trace gold in rock samples by graphite furnace atomic absorption spectrometry is introduced. Detction limit of the method is 0.02 ng/g with precision of 5%～8% RSD n=12. The method is accurate and reliable . Through the test of first grade national standard reference materials, the result meets the quality demand and is in agreement with certified values.