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Sampling method and device for carbon isotopes in water

A carbon isotope and sampling device technology, which is applied in the direction of sampling devices, sampling, measuring devices, etc., can solve the problems of large sampling volume, large sampling volume, and long time, so as to improve speed and accuracy, reduce test equipment, and facilitate The effect of the operation

Active Publication Date: 2016-10-26
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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Problems solved by technology

However, these techniques are applicable to the traditional radiation test method, which is characterized by a large sampling volume (2.5g of carbon is required), and the sampling process cannot avoid the interaction with CO in the air. 2 exposure to contamination of raw water samples
[0003] In fact, with the development of C isotope measurement technology, the use of accelerator mass spectrometry has also become a feasible method. The mass of C required by this method is only 1-5 mg, which is 1 / 500 or even less than that of the radiation test method. Compared with this requirement, the above-mentioned existing technology not only has the problem of too large sampling volume and too long time, but also has the disadvantage that it cannot avoid contact with air, which will greatly increase the interference and error caused by such a small sample

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  • Sampling method and device for carbon isotopes in water
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  • Sampling method and device for carbon isotopes in water

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Embodiment Construction

[0041] The present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0042] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0043] The present disclosure proposes a method for sampling carbon isotopes in water. This method uses the same principle as the method provided by the IAEA, that is, carbon isotope prec...

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Abstract

The invention discloses a sampling method and device for carbon isotopes in water. The method includes the steps that firstly, a sampling bottle is filled with underground water to be sampled and sealed with a silica gel diaphragm plug underwater; secondly, an alkaline solution and a solution for carbonate sedimentation are sequentially injected to the bottom of the sampling bottle through the silica gel diaphragm plug, the same volume of underground water is sucked out of the upper portion of the sampling bottle, and liquid in the sampling bottle is sufficiently and evenly mixed and stands, so sediments deposit at the bottom of the sampling bottle; thirdly, supernate in the sampling bottle is sucked out through the silica gel diaphragm plug, the sediments are reserved, and meanwhile nitrogen with the same volume as the sucked-out supernate is injected; fourthly, the sampling bottle is frozen till the sediments are frozen, the silica gel diaphragm plug is opened, and the sampling bottle is put in a freezing drier to be dried till solid powder is formed.

Description

technical field [0001] The invention relates to the field of carbon isotope sampling, in particular to a method and device for sampling carbon isotope in water. Background technique [0002] Inorganic carbon in water as CO 2 、HCO 3 、H 2 CO 3 , CO 3 form exists, 14 C is a radioactive isotope of carbon, measuring its activity in groundwater can determine the age of groundwater. 14 C dating method is an effective method to study the formation history and evolution law of groundwater. This method is more and more widely used in the research of hydrogeology, hydrology and other disciplines, and its sampling technology is the key to the successful application of this method. The current international sampling method is provided by the IAEA (International Atomic Energy Agency). According to the IAEA method, the China Geological Survey mentioned the sampling method of C isotope in the "Environmental Isotope Survey Program Design and Sample Collection Technical Requirements (G...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/04G01N1/28G01N1/38G01N1/42G01N27/62
CPCG01N1/04G01N1/28G01N1/38G01N1/42G01N27/62G01N2001/386G01N2001/381
Inventor 杨丽虎宋献方
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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