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Preprocessing method and device for testing abundance of carbonates sample 14 C

A technology for testing samples of carbonates, which is applied in the field of element and isotope testing in chemistry. It can solve the problems of large testing costs, limited research and application of C abundance, and long testing cycle, so as to ensure the accuracy of sample testing and the chemical treatment process. Simple and efficient, the effect of reducing the cost of pretreatment

Inactive Publication Date: 2014-05-21
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
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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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  • Preprocessing method and device for testing abundance of carbonates sample 14 C
  • Preprocessing method and device for testing abundance of carbonates sample 14 C
  • Preprocessing method and device for testing abundance of carbonates sample 14 C

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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 22 in this embodiment are called I end, II end and III end respectively. Such as figure 1 Shown, the present invention provides for testing carbonate samples 14 The pre-treatment device of C abundance mainly includes: nitrogen cylinder 1, cold trap A5, piston A6, conical flask A13, conical flask B19, cold trap B20, three-way piston 22, vacuum gauge 23, vacuum gauge 24, piston B25, vacuum pump 26 and U-shaped gas sample collector 31. The nitrogen bottle 1 is connected to the cold trap A5, and a valve 2, a pressure gauge 3 and a flow meter 4 are sequentially arranged between the nitrogen bottle 1 and the cold trap A5. Pack solid alkali particles in the cold trap A5. In addition to being connected to the cold trap A5 and the cold trap B20, the two ends of the piston A6 are also connected to the Erlenmeyer flask A13 through ...

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Abstract

The invention discloses a preprocessing method for testing abundance of carbonates sample 14 C. The preprocessing method comprises the steps of transferring carbon atoms in carbonate sample to CO2 molecule by enabling carbonate to react with an acid solution, enabling CO2 to react with a NaOH solution to obtain a saturated NaHCO3 solution, heating the saturated NaHCO3 solution to obtain a saturated Na2CO3 solution, and using the saturated Na2CO3 solution to test the abundance of 14 C. The invention further discloses a device used for the method. The device mainly comprises a nitrogen cylinder, an absorption cold trap A, a piston A, a conical flask A, a conical flask B, a moisture absorption cold trap B, a three-way piston, a vacuum gauge, a vacuometer, a piston B, a vacuum pump and a U-shaped gas sample collector. The method is capable of greatly simplifying chemical processing process, improving time efficiency and reducing cost on the basis of ensuring the testing precision.

Description

technical field [0001] The invention relates to a test carbonate sample 14 The pretreatment method and equipment of C abundance are mainly used for various geological carbonate samples, groundwater samples, and archaeological samples. 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 improve...

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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