Method for accurately detecting content of molybdenum trioxide in tungsten trioxide
A technology of tungsten trioxide and molybdenum trioxide, which is applied in the measurement of color/spectral characteristics, etc., can solve the problems of high content, high grade of tungsten trioxide, loss of accuracy of tungsten trioxide, etc., and achieve rapid determination and removal of inaccuracy. Effect
Inactive Publication Date: 2021-01-19
HUNAN SHIZHUYUAN NON FERROUS METAL
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Problems solved by technology
[0004] Aiming at the deficiencies in the prior art, the present invention provides a method for accurately detecting the content of molybdenum trioxide in tungsten trioxide, which solves the problem mentioned in the above background technology that the analysis of tungsten trioxide in existing assays often contains Molybdenum is a certain impurity and its content is too high. If it is not removed, the final measurement of tungsten trioxide grade will be too high, and the accuracy of tungsten trioxide grade will be lost.
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[0029] In the following, the technical solutions in the embodiments of the present invention are clearly and completely described. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
[0030] The invention provides a technical solution: a method for accurately detecting the content of molybdenum trioxide in tungsten trioxide, comprising the following steps:
[0031] S1. Dissolving tungsten concentrate and extracting tungsten-containing solution: After measuring the tungsten concentrate by gravimetric method, add sodium hydroxide water bath to dissolve in the platinum dish, and rinse the tungsten on the wall of the dish with secondary water, then cool it into a volumetric flask Medium volume, shake well;
[0032] S2. Mix and shake the mixed solution: take the solution in the volumetric flask and introduce it into the colorimetric tube, add sulfuric acid and mixed acid to the preset capacity, add the...
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The invention discloses a method for accurately detecting the content of molybdenum trioxide in tungsten trioxide, and relates to the technical field of detection of the content of molybdenum trioxidein tungsten trioxide, in particular to a method for accurately detecting the content of molybdenum trioxide in tungsten trioxide, which comprises the following steps: S1, dissolving tungsten concentrate to extract a tungsten-containing solution; S2, mixing and uniformly shaking the mixed solution; and S3, calculating the accurate content of tungsten trioxide. According to the method for accurately detecting the content of molybdenum trioxide in tungsten trioxide, a gravimetric method is arranged, the tungsten concentrate measurement accuracy can be effectively improved, accurate measurement can be effectively provided for tungsten concentrate, efficient mixing of solutions can be effectively guaranteed through even mixing of the solutions, and therefore the tungsten-containing solutions can be effectively extracted, the content of molybdenum in a sample is measured through a spectrophotometer, the content of molybdenum is converted into the content of molybdenum trioxide through a calculation formula, the accurate content of tungsten trioxide is finally obtained by subtracting the content of molybdenum trioxide from the known grade of tungsten concentrate, and the content of tungsten concentrate can be accurately measured.
Description
technical field [0001] The invention relates to the technical field of detecting the content of molybdenum trioxide in tungsten trioxide, in particular to a method for accurately detecting the content of molybdenum trioxide in tungsten trioxide. Background technique [0002] The sample is dissolved in hydrochloric acid, nitric acid and perchloric acid in the presence of a small amount of ammonium fluoride, concentrated until white smoke is emitted to drive off excess fluoride ions and nitrate radicals, tungstic acid is precipitated from tungsten, filtered, and separated from most of the coexisting elements. Dissolve tungstic acid with ammonium hydroxide, evaporate the filtrate to dryness, burn, remove silicon with hydrofluoric acid, and weigh the amount of tungsten trioxide after burning. Determine the content of tungsten trioxide in the residue and filtrate by photometry, and correct the results. When the sample contains more molybdenum, the result of tungsten trioxide wil...
Claims
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Login to View More IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 姚丽娜
Owner HUNAN SHIZHUYUAN NON FERROUS METAL