Method for measuring calcium element in steel by ICP-OES

A calcium element and element technology, which is applied in the field of chemical substance analysis, can solve the problems of insufficient fast and convenient detection data, long time required for sample analysis, and inability to realize large-scale detection, etc., to achieve clear dissolution effect, reduce self-absorption effect, and save energy. The effect of human and material resources

Pending Publication Date: 2022-02-11
青海西钢特殊钢科技开发有限公司 +1
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Problems solved by technology

The detection values ​​of chemical wet method and atomic absorption method are relatively stable and accurate, but this method has the following disadvantages: the operation steps are cumbersome, difficult to control, more chemical reagents are used, the time required for sample analysis is long, the cost is high, and mass detection cannot be realized , affecting the production inspection cycle, making the inspection data not fast and convenient enough

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  • Method for measuring calcium element in steel by ICP-OES
  • Method for measuring calcium element in steel by ICP-OES
  • Method for measuring calcium element in steel by ICP-OES

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Embodiment

[0036] This embodiment relates to a method for ICP-OES determination of calcium in steel, said method comprising the following steps:

[0037]Step 1, sampling: at 1 / 2 of the sample radius, the drilling machine speed is controlled at 800r / min, and the test sample is drilled at a sampling depth of 2cm;

[0038] Step 2, weigh 0.2000g of the sample, accurate to 0.0001g, place the sample in a flat-bottomed volumetric flask, add 10ml of HCl+HNO 3 +H 2 O: (317+83+600), dissolve on the heating furnace, after the sample is completely decomposed, add 10ml H 2 SO 4 +H 3 PO 4 +H 2 O: (160+80+760), secondary dissolution, continue to dissolve, after the violent reaction stops, add 10mL of ultra-pure water along the wall of the bottle, continue heating process, large bubbles appear, there is no impurity in the bottom layer, after the dissolution is complete After the sample is dissolved, take it out and cool it to room temperature, dilute it with ultrapure water to a volume of 100mL to...

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Abstract

The invention provides a method for measuring a calcium element in steel by ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometer). The method comprises the following steps: 1 taking a test sample; 2 preparing a sample solution; 3 preparing a working curve solution; 4 controlling the sample according to the content range of to-be-detected elements; 5 establishing a working curve; 6 calculating the content of related elements in the sample according to the working curve; 7 determining the analysis spectral line interference of each element to be detected and deducting the background; 8 drawing a working curve; and 9 measuring the content of the calcium element in the sample solution: taking the average value of the measured values of the sample solution on the two working curves. According to the method disclosed by the invention, experimental data show that the recovery rate is 95 to 110%; precision detection data show that the RSD of the method is 10%, and the detection requirement is met. Interference is eliminated, the test process is optimized, the problem that a sample is not completely dissolved is solved through new dissolving acid, the accuracy of test data is further improved, and efficient and accurate data can be provided for scientific research and enterprise production.

Description

technical field [0001] The invention belongs to the technical field of chemical substance analysis methods, and in particular relates to an ICP-OES method for measuring calcium elements in steel. Background technique [0002] The determination methods of calcium element in the prior art include: chemical wet method, direct reading spectrometry, atomic absorption method, etc.; among them, chemical wet method and atomic absorption method occupy the dominant position. The detection values ​​of chemical wet method and atomic absorption method are relatively stable and accurate, but this method has the following disadvantages: the operation steps are cumbersome, difficult to control, more chemical reagents are used, the time required for sample analysis is long, the cost is high, and mass detection cannot be realized , affecting the production inspection cycle, making the inspection data not fast and convenient enough. Contents of the invention [0003] The purpose of the pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73
CPCG01N21/73
Inventor 赵海东姚长发祁旭丞陈永梅李万荣乔红梅郭守贵王存发芦晓雪张有军
Owner 青海西钢特殊钢科技开发有限公司
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