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Pretreatment method and device for measuring 14C abundance of organic compound type sample

A technology for testing samples and organic substances, applied in the field of element and isotope testing in chemistry, can solve the problems of shackled C abundance research and application, long testing period, large testing cost, etc., to achieve simple and efficient chemical treatment process and reduced pre-treatment costs. , Guarantee the effect of sample test accuracy

Inactive Publication Date: 2014-05-28
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously, for the need to test a large number of 14 In the research of C sample, the current method not only has a long test period, but also requires a large amount of test funds, which is seriously shackles 14 Research and Application of C Abundance

Method used

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  • Pretreatment method and device for measuring 14C abundance of organic compound type sample
  • Pretreatment method and device for measuring 14C abundance of organic compound type sample
  • Pretreatment method and device for measuring 14C abundance of organic compound type sample

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with drawings and embodiments.

[0023] The three ends of the three-way piston A4 in the present embodiment are respectively called the I end of the three-way piston A4, the II end of the three-way piston A4 and the III end of the three-way piston A4; the three ends of the three-way piston B27 are respectively called As the I end of the three-way piston B27, the II end of the three-way piston B27 and the III end of the three-way piston B27; the three ends of the three-way piston C37 are respectively called the I end of the three-way piston C37 and the II end and the III end of the three-way piston C37; the three ends of the three-way piston D46 are respectively called the I end of the three-way piston D46, the II end of the three-way piston D46 and the III end of the three-way piston D46; the four-way piston 24 The 4 ends are respectively called the I end of the four-way piston 24, the II end of the fo...

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Abstract

The invention relates to a pretreatment method for measuring 14C abundance of an organic compound type sample. The method includes transferring carbon atoms in the organic compound into CO2 molecules through combustion, reacting CO2 with a NaOH solution to obtain a saturate NaHCO3 solution, heating the saturate NaHCO3 solution to obtain a saturate Na2CO3 solution, and adopting the saturate Na2CO3 solution for 14C abundance tests. The invention also provides a device used for the method. The device mainly comprises an oxygen cylinder, a nitrogen cylinder, a cold trap A, a three-way stopcock A, a combustion chamber, a cold trap B, a stone, a cold trap C, a three-way stopcock B, a conical flask, a cold trap D, a three-way stopcock C, a U-shaped gas sample collector, a three-way stopcock D, a vacuum gauge, a vacuometer, a piston D and a vacuum pump. On the basis of guaranteeing the measuring accuracy, the method largely simplifies the chemical treatment process, increases the time efficiency and reduced the cost.

Description

technical field [0001] The invention relates to a method for testing organic matter samples 14 The pretreatment method and equipment of C abundance are mainly used for the analysis of various organic matter samples in geology and archaeology 14 The pretreatment and testing of C abundance belongs to the field of element and isotope testing in chemistry. Background technique [0002] Determination of carbonaceous matter 14 The abundance of C isotopes for 14 C dating is an extremely important dating method in geology and archaeology. right 14 For the determination of C abundance, liquid scintillation spectrometry has been used for a long time to count, so as to calculate the 14 The relative abundance of C is usually measured by modern percent carbon content (PMC). With the rapid development of mass spectrometry in recent years, accelerator mass spectrometry (AMS) is often used to directly measure 14 C / 12 C, 14 The measurement accuracy and reliability of C are greatly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
Inventor 毛绪美王华
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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