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Sample preparation method and test method of glow discharge mass spectrometry ammonium paratungstate powder

A technology of glow discharge mass spectrometry and ammonium paratungstate, applied in the field of analytical chemistry, to shorten the analysis time, improve the accuracy, and avoid the introduction of impurities

Pending Publication Date: 2021-09-07
KONFOONG MATERIALS INTERNATIONAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN110749645A discloses a cage-like sampling device and sample testing method for glow discharge mass spectrometry analysis, to solve the problem of analyzing samples of different types and sizes by glow discharge mass spectrometry (GD-MS)

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  • Sample preparation method and test method of glow discharge mass spectrometry ammonium paratungstate powder

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Embodiment 1

[0036] The present embodiment provides a sample preparation method of ammonium paratungstate powder for glow discharge mass spectrometry, the method comprising:

[0037] The metal thallium is used to rotate the surface of the high-purity indium sheet to create a groove, the diameter of the groove is 0.6mm, and the depth is 0.2mm;

[0038] The indium sheet is placed in a polytetrafluoroethylene container, the indium sheet is cleaned with nitric acid for 3 minutes, rinsed with deionized water for 3 times, finally cleaned with absolute ethanol, and dried for use;

[0039] Use a mixed solution of nitric acid and hydrofluoric acid with a molar ratio of 1:0.8 to clean the polytetrafluoroethylene spatula for 3 minutes, then rinse it with deionized water for 3 times, and finally clean it with absolute ethanol;

[0040] Use the cleaned polytetrafluoroethylene spatula to transfer the ammonium paratungstate powder into the groove, and use a press to compact at 8 MPa for 12 minutes to obt...

Embodiment 2

[0042] The present embodiment provides a sample preparation method of ammonium paratungstate powder for glow discharge mass spectrometry, the method comprising:

[0043] Metal thallium is used to rotate and open grooves on the surface of high-purity indium sheets. The diameter of the grooves is 0.8mm and the depth is 0.4mm;

[0044] The indium sheet is placed in a polytetrafluoroethylene container, the indium sheet is cleaned with nitric acid for 3 minutes, rinsed with deionized water for 3 times, finally cleaned with absolute ethanol, and dried for use;

[0045] Use a mixed solution of nitric acid and hydrofluoric acid with a molar ratio of 1:1.2 to clean the polytetrafluoroethylene spatula for 3 minutes, then rinse it with deionized water for 3 times, and finally clean it with absolute ethanol;

[0046] Use the cleaned polytetrafluoroethylene spatula to transfer the ammonium paratungstate powder into the groove, and use a press to compact it at 12MPa for 8 minutes to obtain th...

Embodiment 3

[0048] The present embodiment provides a sample preparation method of ammonium paratungstate powder for glow discharge mass spectrometry, the method comprising:

[0049] Metal thallium is used to rotate and open grooves on the surface of high-purity indium sheets. The diameter of the grooves is 0.7mm and the depth is 0.3mm;

[0050] The indium sheet is placed in a polytetrafluoroethylene container, the indium sheet is cleaned with nitric acid for 3 minutes, rinsed with deionized water for 3 times, finally cleaned with absolute ethanol, and dried for use;

[0051] Use a mixed solution of nitric acid and hydrofluoric acid with a molar ratio of 1:1 to clean the polytetrafluoroethylene spatula for 3 minutes, then rinse it with deionized water for 3 times, and finally clean it with absolute ethanol;

[0052] Use the cleaned polytetrafluoroethylene spatula to transfer the ammonium paratungstate powder into the groove, and use a press to compact at 10 MPa for 10 minutes to obtain the...

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Abstract

The invention provides a sample preparation method and a test method of glow discharge mass spectrometry ammonium paratungstate powder. The method comprises the steps: forming a groove in the surface of a high-purity indium sheet, cleaning the indium sheet, transferring the ammonium paratungstate powder into the groove by using a cleaned medicine spoon, and compacting by using a press machine to obtain a sample to be tested. According to the sample preparation method, introduction of impurities can be fully avoided, the analysis time is shortened, and the accuracy of a test result is improved; and the test signal obtained by the test method is strong, and the sensitivity is high.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, and relates to a sample preparation method and a testing method of ammonium paratungstate powder for glow discharge mass spectrometry. Background technique [0002] Ammonium paratungstate is a chemical substance with the molecular formula (NH4)10W12O41·5H2O. Monoclinic fine transparent crystal or white crystal. Relative density 2.3. Soluble in water, insoluble in ethanol. The aqueous solution is weakly acidic. Heating in the air, when the temperature is lower than 100°C, part of the ammonia molecules will be removed, and all the ammonia molecules and crystal water will be removed when the heat is strong, and it will turn into a yellow powder of tungsten trioxide. Decompose in acid and alkali solution. React with hydrogen peroxide to form soluble peroxytungstate. It is used to make metal tungsten powder made of tungsten trioxide or blue tungsten oxide. It is also used to manufacture ammo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/34G01N27/68
CPCG01N1/28G01N1/286G01N1/34G01N27/68
Inventor 姚力军边逸军潘杰王学泽叶科奇钟伟华
Owner KONFOONG MATERIALS INTERNATIONAL CO LTD
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