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純金属中微量杂貭的分析,有吸收光譜法,发射光譜法,火焰光度法,极譜法,活化分析法,质谱分析等。有关这些方法的研究和应用已有很多的报导,但均需特殊的仪器和一定的技术水平。虽然吸收光譜法(包括光电比色法)是一个比較准确易于掌握的分析法,但需較純的試剂和标准样品,这也是难以克服的問題。特別是分析純金属,例如常用的最純盐酸也含0.0001％的鉄,故测定铁时这是必須考虑的問題。增量比色法是用內补偿法克服試剂和标准样品不純的困难;即将一个試样的溶液分为三份空白溶液,测定溶液和加入一定量測定元素的定标溶液。在干扰元素和試剂几乎完全相同的条件下測定三者間的消光度差。由消光度和含量的比例关系求出测定元素的含量。
Analysis of trace impurities in pure metals, there are absorption spectrometry, emission spectrometry, flame photometry, polarography, activation analysis, mass spectrometry. There have been many reports on the research and application of these methods, but they require special instruments and certain technical skills. Although the absorption spectrometry (including the photoelectric colorimetric method) is a more accurate and easy-to-understand analytical method, but the need for pure reagents and standard samples, which is difficult to overcome. In particular, analysis of pure metals, such as the most commonly used pure hydrochloric acid, also contains 0.0001% 鉄, so this is an issue that must be considered when measuring iron. Incremental colorimetric is the use of internal compensation method to overcome the impure difficulty of reagents and standard samples; a sample solution is divided into three blank solution, the determination of the solution and the determination of a certain amount of calibration solution. The difference in extinction between the three was determined under the conditions that the interfering element and the reagent were almost identical. From the extinction and content of the relationship between the determination of the content of the determination of elements.