A high-efficiency determination method for cobalt, nickel and aluminum content in natural microalloyed iron powder
A technology of microalloyed iron powder and determination method, applied in the field of chemical detection, can solve problems such as difficult content, and achieve the effects of high analysis accuracy, small matrix effect and good accuracy
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Embodiment 1
[0029] Prepare the following standard solutions as usual:
[0030] 1. Preparation of cobalt standard solution:
[0031] 1A. Put 0.2500g of commercially available reference pure cobalt metal in a 400mL beaker, add nitric acid in an amount of 80mL / g cobalt metal, heat to dissolve completely, and cool to room temperature, wherein the nitric acid has the following volume ratio: HNO 3 :H 2 O=1:1;
[0032] 1B. Transfer the solution in step 1A into a 1000mL volumetric flask, dilute to 1000mL with distilled water, and shake well to obtain a 250.0ug / mL cobalt standard stock solution;
[0033] 1C. Pipette 10mL of the solution in step 1B into a 100mL volumetric flask, dilute to 100mL with water, and shake well to obtain a 25.0ug / mL cobalt standard solution.
[0034] 2. Preparation of nickel standard solution:
[0035] 2A. Put 0.2500g of commercially available benchmark pure metallic nickel in a 400mL beaker, add nitric acid in an amount of 80mL / g metallic nickel, heat to dissolve com...
Embodiment 2
[0054] 1. Preparation of cobalt, nickel and aluminum sample solution in natural microalloy iron powder to be tested:
[0055] 1A, in 0.2500g natural microalloy iron powder test sample, add hydrochloric acid in the amount of 40mL / g sample, heat to dissolve at low temperature, obtain mixed solution, wherein hydrochloric acid is following volume ratio HCl:H 2 O=1:3;
[0056] 1B. In the mixed solution obtained in step 1A, add nitric acid in an amount of 10 mL / g sample, heat to dissolve completely, and cool to room temperature to obtain a solution;
[0057] 1C, according to the amount of 200mL / g sample, add distilled water to the solution obtained in step 1B to 50mL for constant volume, to obtain the sample solution of the content of cobalt, nickel and aluminum to be measured.
[0058] 2. Determination of cobalt and aluminum in natural microalloy iron powder to be tested:
[0059] 2A. Under the same operating conditions as in Example 1 step 5A, measure the spectral line intensity...
Embodiment 3
[0062] 1. Preparation of cobalt, nickel and aluminum sample solution in natural microalloy iron powder to be tested:
[0063] 1A, in 0.5000g natural microalloy iron powder test sample, add hydrochloric acid by the amount of 20mL / g sample, heat to dissolve at low temperature, obtain mixed liquor, wherein hydrochloric acid is following volume ratio HCl:H 2 O=1:3;
[0064] 1B. In the mixed solution obtained in step 1A, add nitric acid in an amount of 6 mL / g sample, heat to dissolve completely, and cool to room temperature to obtain a solution;
[0065] 1C, according to the amount of 200mL / g sample, add distilled water to the solution obtained in step 1B to 100mL for constant volume, to obtain the sample solution of cobalt, nickel and aluminum content to be measured.
[0066] 2. Determination of cobalt and aluminum in natural microalloy iron powder to be tested:
[0067] 2A. Under the same operating conditions as in Example 1 step 5A, measure the spectral line intensity of the s...
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