Detecting method for phosphorus content in vanadium slag
A detection method and technology for phosphorus content, applied in the field of chemical detection, can solve problems such as difficult to master, cumbersome operation, interference of phosphorus, etc., and achieve the effects of saving detection time, high analysis efficiency, and reducing experimental errors.
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Embodiment 1
[0076] ——Determination of phosphorus content in vanadium slag samples
[0077] Reagents for detection:
[0078] Sodium carbonate-boric acid mixed flux: It is made by mixing sodium carbonate and boric acid with a mass ratio of 2:1 and grinding them finely.
[0079] Hydrochloric acid solution: It is formed by mixing 37% hydrochloric acid and water with a volume ratio of 1:2, and 37% hydrochloric acid and water with a volume ratio of 4:96.
[0080] p-nitrophenol solution: ethanol solution with a concentration of 10g / L.
[0081] Sodium hydroxide solution: the concentration is 200g / L.
[0082] Mixed solution of ascorbic acid-hydroxylamine hydrochloride-bismuth nitrate: dissolve 2g of bismuth nitrate in 20ml of 1+1 hydrochloric acid, and dissolve 25g of ascorbic acid and 25g of hydroxylamine hydrochloride in 480ml of 1+47 of hydrochloric acid, combine the above two solutions, and mix well.
[0083] Ammonium molybdate-potassium antimony tartrate mixed liquid: Dissolve 10g ammonium...
Embodiment 2
[0100] ——Determination of phosphorus content in vanadium slag samples
[0101] Detection reagent: same as embodiment 1
[0102] Sample testing:
[0103] A. Sample pretreatment: crush the sample to a particle size of ≤0.125mm, dry it at 105-110°C for 1.5-2.5h, seal it in a desiccator, and cool it to room temperature;
[0104] B, C, D, E, F steps are the same as embodiment 1.
[0105] G. Content calculation: The phosphorus content in the vanadium slag sample is calculated as follows:
[0106] m 1 ——Based on the vanadium slag sample absorbance value of 0.401, the phosphorus quality found on the working curve is 67.33ug;
[0107] m - the mass of the sample in step B is 0.2000g;
[0108] V 1 - The volume of the test solution pipetted in step C is 20.00ml;
[0109] V—the total volume of the test solution in step B is 250ml.
[0110]
Embodiment 3
[0112] ——Determination of phosphorus content in vanadium slag samples
[0113] Detection reagent: same as embodiment 1
[0114] Sample testing:
[0115] A. Sample pretreatment: crush the sample to a particle size of ≤0.125mm, dry it at 105-110°C for 1.5-2.5h, seal it in a desiccator, and cool it to room temperature;
[0116] B, C, D, E, F steps are the same as embodiment 1.
[0117] G. Calculation of content: the calculation of vanadium slag content in the sample is as follows:
[0118] m 1 ——Based on the vanadium slag sample absorbance value 0.690, the phosphorus quality found from the working curve is 125.36ug;
[0119] m - the mass of the sample in step B is 0.2000g;
[0120] V 1 - The volume of the test solution pipetted in step C is 20.00ml;
[0121] V—the total volume of the test solution in step B is 250ml.
[0122]
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