Determination method of vanadium, titanium and chromium content in a kind of natural microalloy iron powder
A technology of micro-alloyed iron powder and determination method, applied in the field of analysis and testing, can solve problems such as difficulty, and achieve the effects of reducing pollution, reducing costs and improving detection efficiency
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Embodiment 1
[0048] Prepare the following standard solutions as usual:
[0049] 1. Preparation of vanadium standard solution:
[0050] 1A. Bake the commercially available benchmark pure vanadium pentoxide at 110°C for 4 hours, place it in a desiccator and cool it down to room temperature;
[0051] 1B, place 0.4463g vanadium pentoxide obtained in step 1A in a 250mL beaker, press 60mL / g 五氧化二钒 The amount of hydrochloric acid of ρ1.19g / mL was added to obtain a mixed solution;
[0052] 1C. Add ρ1.10g / mL hydrogen peroxide dropwise to the mixed solution obtained in step 1B, heat to dissolve completely, and cool to room temperature to obtain a solution;
[0053] 1D. Transfer the solution obtained in step 1C into a 1000mL volumetric flask, dilute to 1000mL with water, and shake well to obtain a 250.0ug / mL vanadium-containing stock solution;
[0054] 1E. Pipette 10 mL of the solution in step 1D into a 100 mL volumetric flask, dilute to 100 mL with water, and shake well to obtain a vanadium standa...
Embodiment 2
[0079] 1. Preparation of vanadium, titanium and chromium sample solution in natural microalloy iron powder to be tested:
[0080] 1A. In 0.5000g of natural microalloyed iron powder to be tested, press 30mL / g 试样 The amount of adding volume ratio HCl:H 2 O=1:2 hydrochloric acid, heated to 100°C to dissolve to obtain a mixed solution;
[0081] 1B. In the mixed solution obtained in step 1A, press 10mL / g 试样 The amount of nitric acid was added, and heated until dissolved to obtain a mixed solution;
[0082] 1C. In the mixed solution obtained in step 1B, press 8mL / g 试样 amount, add perchloric acid, heat to emit perchloric acid white fumes for 5-10 minutes, cool to obtain a solution;
[0083] 1D, in the solution obtained in step 1C, press 30mL / g 试样 The amount of adding volume ratio HCl:H 2 O=1:2 hydrochloric acid, then heated until the salts are dissolved, cooled and filtered to obtain a solution;
[0084] 1E, according to 200mL / g 试样 Add distilled water to the solution obtained...
Embodiment 3
[0089] 1. Preparation of vanadium, titanium and chromium sample solution in natural microalloy iron powder to be tested:
[0090] 1A. In 0.5000g of natural microalloyed iron powder to be tested, press 40mL / g 试样 The amount of adding volume ratio HCl:H 2 O=1:2 hydrochloric acid, heated to 120°C to dissolve to obtain a mixed solution;
[0091] 1B. In the mixed solution obtained in step 1A, press 12mL / g 试样 The amount of nitric acid was added, and heated until dissolved to obtain a mixed solution;
[0092] 1C. In the mixed solution obtained in step 1B, press 10mL / g 试样 amount, add perchloric acid, heat to emit perchloric acid white fumes for 5-10 minutes, cool to obtain a solution;
[0093] 1D, in the solution obtained in step 1C, press 40mL / g 试样 The amount of adding volume ratio HCl:H 2 O=1:2 hydrochloric acid, then heated until the salts are dissolved, cooled and filtered to obtain a solution;
[0094] 1E, according to 200mL / g 试样 Add distilled water to the solution obtaine...
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