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Validation of method for the analysis of steels and alloys

机译：钢材和合金分析方法的验证

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Normally for the analysis of stainless steel (SS), low alloy steel (LAS), aluminium alloy (Al A), brass and white metal standard methods are employed wherein gravimetric, titrimetric and Flame Atomic Absorption Spectroscopy (FAAS) are used. These are generally cumbersome, tedious and laborious to use. Present study describes the use of Standard Materials (SM) and Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The digestion procedure is adopted from the standard methods and then the solution was aspirated to ICP-OES. This was an easy way in which these materials can be analyzed, in comparison with the existing. The method was validated by doing repeatable and reproducible experiments. It was established that the analysis done was valid and acceptable within limits of the analysis of these materials. To authenticate the above findings, Inter Laboratory Comparison (ILC) for the validation of this test method has been conducted. The present method of analysis can be implemented only if SM, which takes into account the matrix effect, is available, since no primary standards are used in this field of analysis. However, use of ICP-OES was not uncommon or unacceptable. We have compared the method validation and ILC results in which different test methods were employed, to find that the z-scores are lower than 2.0. It may be emphasized that acid dissolution followed by ICP-OES using SM was an authentic way of analysis and was similar to the available methods.
机译：通常用于分析不锈钢（SS），低合金钢（LAS），铝合金（Al A），黄铜和白色金属的标准方法，其中使用重量法，滴定法和火焰原子吸收光谱法（FAAS）。这些通常使用起来麻烦，繁琐且费力。本研究描述了标准材料（SM）和电感耦合等离子体发射光谱（ICP-OES）的使用。采用标准方法进行消解，然后将溶液抽吸至ICP-OES。与现有技术相比，这是分析这些材料的简便方法。通过重复性和可重复性实验验证了该方法。可以确定，所做的分析在这些材料的分析范围内是有效的并且可以接受。为了验证上述发现，已经进行了实验室间比较（ILC）来验证该测试方法。仅当考虑到矩阵效应的SM可用时，才能实施本分析方法，因为在该分析领域中未使用任何主要标准。但是，使用ICP-OES并不罕见或不可接受。我们比较了采用不同测试方法的方法验证和ILC结果，发现z得分低于2.0。可能需要强调的是，使用SM进行酸溶解，然后进行ICP-OES分析是一种可靠的分析方法，与可用方法相似。

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