Qualitative analysis using elemental analyzers must first fully understand the various physical and chemical properties of the substance to be analyzed and other substances coexisting with it, in order to select or manufacture the qualitative difference or significant difference between the substance to be analyzed and other substances. Analytical instrument basis. The sampling method of the multi-element element analyzer during use is also a key step in analyzing the accuracy of the test results.

The sampling method should follow the following principles:

1. For small section steels, the cuttings should be taken from the entire cross-section of the steel or drilled along the cross-section in the rolling direction.

2. Samples for chemical analysis can be drilled, shaved, or made with certain tools. Cutting should be crushed and mixed evenly. Do not use water, oil, or other lubricants when cutting, and remove surface oxide scale and dirt.

3, the surface of dust or oxide layer, should do the appropriate cleaning.

4. Samples used for the analysis of the chemical composition of steel must be taken in representative locations of molten steel or steel. The sample should be uniform and can fully represent the chemical composition of each tank steel and should have sufficient quantity.

5, large-section steel, sample debris should be from the center of the cross-section of the steel to the edge of the middle of the edge parallel to the axis of the drill, or from the side of the steel perpendicular to the centerline of the shaft drilling, drilling depth should reach the axis of the steel or billet Department.