电感耦合等离子体发射光谱测定钨矿石中三氧化钨

Determination of Tungsten Trioxide in Tungsten Rock by ICP-AES

采用电感耦合等离子体发射光谱对钨矿石中三氧化钨含量的测定方法进行了研究。选择了仪器的最佳条件,为了避免共存元素对测定的干扰,采用国家一级标准物质GBW07284作为高标准,使得标准和样品的基体相匹配。在波长209.4nm、224.8nm和239.7nm下测定三氧化钨,其下限为0.0004%,相对标准偏差4.0%。经国家一级标准物质分析验证方法可行,实际样品的分析结果与其它分析方法吻合。

A method has been developed for the content determination of Tungsten trioxide in Tungsten rock by ICP-AES. The operating condition of the instrument was optimized, to avoiding the interference of the determination from common coexistent elements, regard the national standard reference sample GBW07284 as the high standard, the major matrixes of sample is indentical with the standard's. Tungsten trioxide is determined at 209.4 nm、224.8 nm、239.7 nm, and lower limit 0.001%, the precision of 7.1%RSD(n=10). The method has been applied to the determination of Tungsten trioxide in national standard reference sample, the results are in agreement with other method.