Method for determination of carbon and sulphur content of uranium tetrafluoride
A technology of uranium tetrafluoride and a determination method, which is applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of high repeatability, low cost, and inability to detect the content of carbon and sulfur elements in uranium tetrafluoride, and achieves High-precision detection, reducing interference problems, and reducing the effect of blank values
Inactive Publication Date: 2016-07-27
CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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[0003] The purpose of the present invention is to solve the problem that the existing detection methods cannot detect the content of carbon and sulfur in uranium tetrafluoride, and provide a low-cost, high-repeatability, which can accurately measure the content of carbon and sulfur in uranium tetrafluoride Determination method of carbon and sulfur content in uranium tetrafluoride
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[0038] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0039] Such as figure 1 Shown, a kind of method for measuring carbon and sulfur element content in uranium tetrafluoride, specifically comprises the following steps:
[0040] The first step is to warm up the instrument.
[0041] Preheat the instrument for more than 1 hour under ventilation.
[0042] The second step is to determine the blank value.
[0043] Step 2.1: Determination of the blank value of tungsten flux.
[0044] Weigh 1.000g of a pure iron standard sample with a carbon content of 5-10μg / g and a sulfur content of 3-12μg / g, and add 2.5g of tungsten flux. The tungsten flux is tungsten particles with a particle size of 20-40 meshes, baked in a muffle furnace at 300°C before use, and the carbon content is less than 0.0005%. Add 1.0g of tungsten flux into the bottomed crucible, and burn the bottomed crucible once in the carbon-sulfur analyze...
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The invention relates to the technical field of chemical detection methods and concretely relates to a method for determination of carbon and sulphur content of uranium tetrafluoride. The method solves the problem that the existing detection method cannot detect carbon and sulphur content of uranium tetrafluoride. The method comprises device preheating, baseline value determination, device correction, test sample determination and carbon and sulphur content calculation. Through use of an F inhibitor cerium oxide, F-caused device corrosion is prevented. A C-F bond is completely broken in a reaction and the C-F bond is completely released by C so that interference in determination is reduced. A baseline value is reduced through a plurality of methods so that a low and stable baseline value is obtained. Through optimization of main work conditions of a detection device, carbon and sulfur detection limits of the analysis method are 5 micrograms per gram so that high-precision detection of carbon and sulphur of uranium tetrafluoride is realized.
Description
technical field [0001] The invention relates to the technical field of chemical detection methods, in particular to a method for measuring the content of carbon and sulfur elements in uranium tetrafluoride. Background technique [0002] There have been many studies abroad on the analysis methods of gaseous impurity elements in metal materials, such as ASTM.E1019-2008 "Determination of Carbon, Sulfur, Oxygen, and Nitrogen in Iron and Steel, Nickel-based Alloys and Cobalt-based Alloys" and ISO15350:2000 "Determination of total carbon and sulfur content in iron and steel", etc. Most of these methods use special gas analysis instruments, and the lower limit of determination of carbon and sulfur is 10μg / g-20μg / g; there are also related researches on the analysis and testing technology of gas impurity elements in uranium compounds in China, such as EJ / T1164-2002 "Uranium Dioxide Determination of Sulfur in Pellets", GB / T13697-1992 "Determination of Carbon in Uranium Dioxide Pellet...
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IPC IPC(8): G01N5/00
Inventor 赵永红王虹
Owner CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND