Process for determining vanadium content in desulfurizing liquid
A measurement method and technology of desulfurization liquid, applied in color/spectral characteristic measurement, material analysis through observation of the influence on chemical indicators, analysis through chemical reaction of materials, etc., can solve problems such as poor stability of color developers
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[0021] 1) Preparation of sodium metavanadate standard solution
[0022] Weigh 0.1g of the reagent sodium metavanadate dried at 100°C, dissolve it in a 1L volumetric flask with distilled water, dilute to the mark, and shake well. 1ml of this solution contains NaVO 3 0.1mg.
[0023] 2) Determination of the maximum absorption wavelength of tannic acid-vanadium complex
[0024] Measurement conditions: under normal temperature and pressure conditions, tannic acid concentration 10g·L -1 , The concentration of sodium metavanadate 0.1mg·mL -1 . Pipette 0.1mg·mL -1 NaVO 3 Put 5mL of standard solution in a 50mL volumetric flask, add NaAC solution 5 with a mass concentration of 20% and H with a volume concentration of 10% 2 SO 4 Solution 0.5mL, then add Na with a mass concentration of 10% 2 SO 3 After 5mL of solution is evenly mixed, add 10g·L -1 10 mL of tannic acid solution, dilute to the mark with distilled water, take the tannic acid solution as a blank sample, use LAMBDA BIO 40 UV / Visib...
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