Method for measuring magnesium element in steel by ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometer) method

Abstract

The invention belongs to the technical field of chemical substance analysis methods, and discloses a method for measuring a magnesium element in steel by ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometer), which comprises the following steps: 1) sampling; 2) dissolving a sample, treating a blank sample and preparing a working curve solution; and 3) sample determination. The method is a method for measuring the content of the magnesium element in the steel, a scrap-shaped sample can be effectively and fully dissolved by preparing mixed acid, the low result caused by filtering of a sample dissolving solution is reduced, meanwhile, the influence of main working parameters of ICP on a spectral line is optimized, the matrix effect and interference of coexisting elements are eliminated through basic matching, and the detection accuracy is improved. According to the method, the detection limit is reduced by 0.0005% or below when the sample weighing amount is increased, the recovery rate is 93%-107% within the measurement range of 0.0005%-0.005%, the precision is good, the measurement lower limit can reach 0.0005%, the measurement upper limit reaches 0.0050%, the method is high in sample dissolving speed, high in analysis precision, easy and convenient to operate and high in efficiency, the content of the magnesium element in the steel can be measured at the same time, and the analysis requirement of the magnesium element in the steel can be met.

Description

technical field [0001] The invention belongs to the technical field of chemical substance analysis methods, and in particular relates to a method for measuring magnesium in steel by ICP-OES. Background technique [0002] Through the analysis of the composition of the forging material and oxide inclusions of ESR steel, magnesium has a significant impact on the properties of steel. Magnesium has a much stronger deoxidation ability than aluminum. When the molten steel contains 0.0010% of magnesium, the It can make the oxygen content of molten steel lower and the purity higher. Magnesium, as a desulfurizing agent for steelmaking, has a strong affinity for oxygen and sulfur at high temperatures, and has a certain solubility in steel. A trace amount of magnesium reduces the number of inclusions in steel, reduces their size, distributes them uniformly, improves their shape, and improves steel. The carbide size and distribution, the carbide particles are fine and uniform. Can redu...

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Problems solved by technology

The detection values ​​of chemical wet method and atomic absorption are relatively stable, but the methods are cumbersome to operate and difficult to control. Many chemical reagents are used in the preparation of samples, and the time required for sample analysis is long and the cost is high. They are generally used for arbitration inspections and cannot be realized in large quantities. Inspection, which affects the production inspection cycle, makes the inspection data not fast and convenient enough

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