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针对高海拔地区大气压低、水的沸点低,金的溶出率不高的情况,通过三角瓶敞口和聚乙烯塑料瓶封闭溶样进行地质金矿样品分解方法的对比表明,利用聚乙烯塑料瓶在水浴锅中封闭溶样,矿样中的金可分解完全。该方法经国家一级标准物质分析验证,结果与标准值相符。该方法精密度(RSD,n=5)为3.65%～4.83%,检出限为0.15μg/g,适用于高海拔地区野外现场批量样品分析。
Aiming at the situation of low atmospheric pressure, low boiling point of water and low dissolution rate of gold in the high altitude area, the comparison of the sample dissolution methods of geologic gold deposits by the flask opening and the polyethylene plastic bottle shows that the use of polyethylene plastic bottles In the water bath closed soluble sample, the gold sample can be completely decomposed. The method is validated by the national standard material analysis and the result is consistent with the standard value. The precision (RSD, n = 5) of the method was 3.65% -4.83%, and the detection limit was 0.15μg / g. The method was suitable for batch field sample analysis in high altitude areas.