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Carbon isotope sampling method and device in water

A carbon isotope, sampling bottle technology, applied in sampling devices, sampling, measuring devices, etc., can solve the problems of large sampling volume, large sampling volume, raw water sample pollution, etc., to improve rapidity and accuracy, and less test equipment. , the effect of preventing pollution

Active Publication Date: 2019-01-11
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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  • Carbon isotope sampling method and device in water
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  • Carbon isotope sampling method and device 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. The principle of this method is the same as that provided by the IAEA, that is, carbon isotope preci...

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Abstract

The invention discloses a carbon isotope sampling method and device in water. The method comprises: step 1: filling the sampling bottle with groundwater for sampling and sealing the sampling bottle with a silica gel diaphragm plug underwater; step 2: passing the Inject the alkali solution and the solution for carbonate precipitation into the bottom of the sampling bottle sequentially through the silica gel septum plug, and at the same time extract an equal volume of groundwater from the upper part of the sampling bottle, fully mix the liquid in the sampling bottle, and then statically Set the sediment to the bottom of the sampling bottle; step 3: extract the supernatant in the sampling bottle through the silica gel septum plug, leave the sediment, and inject the same volume as the extracted supernatant Step 4: freeze the sampling bottle until the precipitate freezes, then open the silica gel septum plug, and put the sampling bottle into a freeze dryer to dry until a 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...

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Application Information

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Patent Type & Authority Patents(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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