Sampling technique with use of vacuum degassing and air blowing method to determine 14C age of ground water as well as sampling system

A technology of vacuum degassing and sampling system, applied in sampling device and other directions, can solve the problems of inconvenient portability and transportation, large volume, heavy sampling device, etc., and achieve the effects of avoiding modern carbon pollution, fast degassing rate, and reducing weight

Inactive Publication Date: 2003-05-07
INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the sampling device is heavy (if a nitrogen cylinder is required) and bulky, it is inconvenient to carry and transport, and it is generally only used in special needs (such as the collection of brine samples).

Method used

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  • Sampling technique with use of vacuum degassing and air blowing method to determine 14C age of ground water as well as sampling system
  • Sampling technique with use of vacuum degassing and air blowing method to determine 14C age of ground water as well as sampling system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] As shown in Fig. 1, gather underground brine with the present invention 14 C Dating samples are taken as examples to further describe the invention.

[0026] Among them, the specifications of the devices in the system: Vacuum pump: pumping rate 0.5 liters / second; ultimate vacuum degree 6.7 Pa; buffer bottle: volume 5 liters; carbon dioxide collector: 35mm; h200mm; Extractor: 260mm; h400mm; funnel volume 50mL; air washing bottle: 35mm; h200mm; 500mL of 100g / L potassium hydroxide solution inside.

[0027] Its process operation steps are as follows:

[0028] (1) Connect the parts with rubber tubes as shown in Figure 1;

[0029] (2) Open three-way valve 14, close two-way valve 10,11,12,13; Add 1+1 phosphoric acid solution 50mL in funnel 8,9; Add 100g / L potassium hydroxide solution 500mL in air washing bottle;

[0030] (3) Turn on the vacuum pump to pump air for 2 minutes; after stopping the pump, add 500mL of 50g / L potassium hydroxide solution to the carbon dioxide co...

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Abstract

This invention relates to a sample technology and its sample system for 14C age underground water test with vacuum degas and gas-blast method, composed of air wash bottle, CO2 remover, CO2 collector, buffer bottle, vacuum pump and connection pipes and valve gate and this technology is finished by system vacuum-pumping, water sampling, adjusting PH value, gas boasting and gas removing collecting CO2. The invented sample system has the advantage of good seal performance (without modern carbon pollution) small volume, and light weight.

Description

technical field [0001] The present invention relates to a groundwater 14 Sampling process and sampling system of vacuum degassing and blowing method for C age determination. Background technique [0002] 14 The C dating method is recognized as an effective method for studying the formation history and evolution of groundwater. This method is more and more widely used in the research work of hydrogeology and other disciplines. Sampling technology is one of the key technologies in the application of this method. There are two methods currently used - the precipitation method and the aeration method. The precipitation method is to dissolve the dissolved inorganic carbon in groundwater with barium carbonate (BaCO 3 ) or strontium carbonate (SrCO 3 ) form, which was collected and sent to the laboratory for analysis. The device is simple and easy to operate, so it is widely used at present. However, due to the poor airtightness of the device, the method needs to open the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/02G01N1/14G01N1/22
Inventor 齐继祥
Owner INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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