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Method for simultaneous determination for Mo, Ti and W element of uranic fluoride

A technology of uranium hexafluoride and elements, applied in the field of simultaneous determination of Mo, Ti and W in uranium hexafluoride

Inactive Publication Date: 2011-07-20
GANSU AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Spectrophotometry is usually used for the determination of a single component. In multi-component analysis, due to the overlap of component spectra, the measurement interferes with each other, and the chemical treatment process is cumbersome and time-consuming.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take uranium hexafluoride hydrolyzate containing 1g of uranium in a platinum dish, add 3mL of concentrated nitric acid, and evaporate to near dryness. Add 6 mL of deionized water to slightly heat to dissolve the residue, transfer it to a separatory funnel, wash the platinum dish with 2 mL of deionized water twice, and transfer it to a separatory funnel together. Add 25mL of TBP-xylene mixture (1+2) and shake for 30s. After layering, transfer the water phase to another separatory funnel, repeat the extraction operation once more, and transfer the layered water phase into 25mL volumetric flask. Add 1.0mL of 5mol / L hydrochloric acid, 1×10 -3 mol / L salicyl fluorone 2.5mL, 2×10 -2 mol / L hexadecyltrimethylamine bromide 3.0mL, dilute to the mark with water, shake well, stand still for 20min, take reagent blank as reference, use 1cm cuvette in the wavelength range of 490nm~550nm, measure every 2nm According to the absorbance value of the solution, the calculated contents of ...

Embodiment 2

[0015] Take uranium hexafluoride hydrolyzate containing 1g of uranium in a platinum dish, add 3mL of concentrated nitric acid, and evaporate to near dryness. Add 6 mL of deionized water to slightly heat to dissolve the residue, transfer it to a separatory funnel, wash the platinum dish with 2 mL of deionized water twice, and transfer it to a separatory funnel together. Add 25mL of TBP-xylene mixture (1+2) and shake for 30s. After layering, transfer the water phase to another separatory funnel, repeat the extraction operation once more, and transfer the layered water phase into 25mL volumetric flask. Add 1.0mL of 7mol / L hydrochloric acid, 3×10 -3 mol / L salicyl fluorone 2.5mL, 2×10 -2 mol / L hexadecyltrimethylamine bromide 3.0mL, dilute to the mark with water, shake well, stand still for 30min, take reagent blank as reference, use 1cm cuvette in the wavelength range of 490nm~550nm, measure every 2nm According to the absorbance value of the solution, the calculated contents of ...

Embodiment 3

[0017] Take uranium hexafluoride hydrolyzate containing 1g of uranium in a platinum dish, add 3mL of concentrated nitric acid, and evaporate to near dryness. Add 6 mL of deionized water to slightly heat to dissolve the residue, transfer it to a separatory funnel, wash the platinum dish with 2 mL of deionized water twice, and transfer it to a separatory funnel together. Add 25mL of TBP-xylene mixture (1+2) and shake for 30s. After layering, transfer the water phase to another separatory funnel, repeat the extraction operation once more, and transfer the layered water phase into 25mL volumetric flask. Add 1.0mL of 5mol / L hydrochloric acid, 2×10 -3 mol / L salicyl fluorone 2.5mL, 1×10 -2 mol / L hexadecyltrimethylamine bromide 3.0mL, dilute to the mark with water, shake well, stand still for 40min, take reagent blank as reference, use 1cm cuvette in the wavelength range of 490nm~550nm, measure every 2nm According to the absorbance value of the solution, the calculated contents of ...

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Abstract

The invention relates to a method for simultaneously determining Mo element, Ti element and W element in uranic fluoride, belonging to the chemical analysis field. The invention is characterized in that the method for simultaneously determining the Mo element, the Ti element and the W element through a neutral network spectrophotometry is as follows: the dosage of 4 to 8 mol / L hydrochloric acids is between 0.5 and 1.0 mL; the dosage of (1-3)x10<-3>mol / L salicyl fluorone is between 2.5 and 3.5 mL; the dosage of (1-3) x10<-2>mol / L cetrimide is between 3.0 and 6.0 mL; and the color development time is between 10 and 60 minutes. The method combines a neutral network and a spectrophotometry, gives full play to the advantages of the spectrophotometry and simplifies the chemical treatment process when a plurality of compositions are determined simultaneously. The method not only can provide an accurate chemometrics method for simultaneously determining a plurality of impurity elements in theuranic fluoride through the spectrophotometry but also can be promoted to the other uranium compound analysis field. The content ranges of the Mo element, the Ti element and the W element in the uranic fluoride determined by the method are respectively 0.5 to 7.0mu g / gU,0.3 to 5.0mu g / gU and 0.5 to 7.0mu g / gU.

Description

technical field [0001] The present invention relates to a method for simultaneously determining the three elements Mo, Ti and W in uranium hexafluoride, in particular to a neural network spectrophotometric method for simultaneously determining the three elements Mo, Ti and W in uranium hexafluoride The method belongs to the related field of spectrophotometry. Background technique [0002] Molybdenum, titanium and tungsten in nuclear fuel UF6 are the main impurity elements to be controlled. Spectrophotometry is usually used for the determination of a single component. In multi-component analysis, due to the overlap of component spectra, the measurement interferes with each other, and the chemical treatment process is cumbersome, time-consuming and labor-intensive. Combining artificial neural network with spectrophotometry, the advantages of spectrophotometry are brought into play, and the chemical treatment process is simplified when multi-components are measured simultaneo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N1/34
Inventor 李海燕王关平张金霞吴彦霖张芮
Owner GANSU AGRI UNIV
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