A kind of determination method of total iron content in vanadium slag
A determination method and technology for iron content, applied in the field of chemical detection, can solve the problems of incomplete dissolution of the sample, interference with the total iron content, large measurement error, etc., and achieve the effect of good promotion and application prospects, fast analysis speed, and reduction of test errors.
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[0040] Example 1
[0041] ——Detection of total iron content in vanadium slag sample
[0042] Reagents for detection:
[0043] Sodium hydroxide: (solid).
[0044] Sulfuric acid: the concentration is (ρ1.84g / mL).
[0045] Phosphoric acid: The concentration is (ρ1.69g / mL).
[0046] Hydrochloric acid: the concentration is (ρ1.19g / mL).
[0047] Titanium trichloride: the concentration is (150g / L-200g / L).
[0048] Sodium hydroxide solution: the concentration is 50g / L.
[0049] Hydrochloric acid: (1+1).
[0050] Hydrochloric acid: (5+95).
[0051] Ammonia thiocyanate solution: the concentration is 50g / L.
[0052] Stannous chloride solution 100g / L: Weigh 10g of stannous chloride and dissolve it in 20mL of hot hydrochloric acid (ρ1.19g / mL), dilute to 100mL with water, and shake well.
[0053] Sodium tungstate solution 250g / L: Weigh 25g sodium tungstate and dissolve it in 95mL water (filter if it is turbid), add 5mL phosphoric acid (4.2), shake well.
[0054] Titanium trichloride solution: Pipette 5mL tita...
Example Embodiment
[0075] Example 2
[0076] ——Detection of total iron content in vanadium slag sample
[0077] Detection reagent: same as Example 1
[0078] Sample detection:
[0079] A. Sample pretreatment: crush the sample to a particle size ≤0.125mm, dry it at 105-110℃ for 1.5-2.5h, seal it in a desiccator, and cool it to 20-25℃.
[0080] Steps B, C, D, E, and F are the same as in Example 1.
[0081] G. Content calculation: The iron content in the sample is calculated as follows:
[0082] c——The concentration of potassium dichromate standard titration solution is 0.0400 (mol / L);
[0083] m——The mass of the sample in step B is 0.2000g;
[0084] V 0 ——The titration blank test solution consumes potassium dichromate and the standard titration solution volume is 0.00ml;
[0085] V——The titration sample solution consumes potassium dichromate. The standard titration solution volume is 34.50ml;
[0086] 55.85-per mole mass of iron, in grams per mole (g / mol).
[0087]
[0088]
[0089] =38.54
Example Embodiment
[0090] Example 3
[0091] ——Detection of total iron content in vanadium slag sample
[0092] Detection reagent: same as Example 1
[0093] Sample detection:
[0094] A. Sample pretreatment: crush the sample to a particle size ≤0.125mm, dry it at 105-110℃ for 1.5-2.5h, seal it in a desiccator, and cool it to 20-25℃.
[0095] Steps B, C, D, E, and F are the same as in Example 1.
[0096] G. Content calculation: The iron content in the sample is calculated as follows:
[0097] c——The concentration of potassium dichromate standard titration solution is 0.0400 (mol / L);
[0098] m——The mass of the sample in step B is 0.2000g;
[0099] V 0 ——The titration blank test solution consumes potassium dichromate and the standard titration solution volume is 0.00ml;
[0100] V——The titration sample solution consumes potassium dichromate and the standard titration solution volume is 6.95ml;
[0101] 55.85-per mole mass of iron, in grams per mole (g / mol).
[0102]
[0103]
[0104] =7.76
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