论文部分内容阅读
在地质工作中,光譜分析主要用来作金属量的半定量分析,通常采用的方法是在电弧中蒸发样品,元素含量可由目视法比较分析样品和标准样品的谱线黑度来确定。在多数情况下,按此法重复作的光谱分析数据,偏差范围不超过平均值的±100％。然而,同一样品特别是具有不同矿物成份的矿石样品,其光谱化学分析的结果表明远不是如此顺利。我们对1500个矿样中的钨、铜和钼的光谱分析与化学分析的偏差所做的估价可证明这一点(表一)。
In geological work, spectral analysis is mainly used for semi-quantitative analysis of the amount of metal. The commonly used method is to evaporate the sample in an electric arc. The elemental content can be determined by comparing the darkness of the sample with that of the standard sample visually. In most cases, repeated spectral analysis data according to this method do not exceed ± 100% of the average. However, the same sample, especially ore samples with different mineral components, the result of spectral chemical analysis shows far from being so smooth. This is evidenced by our assessment of deviations from the spectral and chemical analyzes of tungsten, copper and molybdenum in 1500 samples (Table 1).