发射光谱法测定化探样品中金

Determination of Gold in Geochemical Exploration Samples by Emission Spectrometry

摘要: 以盐酸、氯化钠、高锰酸钾为溶金液，炭粉为缓冲剂，铂为内标，电弧发射光谱法测定化探样品中的金。方法对金的测定范围为0.3～1500 ng/g，检出限为0.22 ng/g，精密度（RSD，n=12）为3.2%～12.8%。方法经国家一级标准物质验证，测定结果与标准值相符。

Abstract: Sample was digested with HCl-NaCl-KMnO4and gold in the sample was then determined by arc-emissionspectrometry with powdered carbon as a buffer and Pt as an internal standard. The detection limit of the method was 0.22 ng/g for Au with detection range of 0.3～1500 ng/g. The method has been applied to the determination of Au in National Standard Reference Materials. The results are in agreement with the certified values with precision of 3.2%～12.8%RSD