Freeze prevention method for CO2 absorption liquid for in-situ winter soil respiration sample plot monitoring

A technology for soil respiration and liquid absorption, which is used in the field of CO2 absorption liquid antifreeze for in-situ monitoring of soil respiration field samples in winter. Wide range of low-cost effects

Inactive Publication Date: 2014-02-12
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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Problems solved by technology

However, this method also has certain limitations, mainly because the lye used in this method is made of water as a solvent. When the temperature is lower than 0°C, the solution will freeze and cannot absorb the CO released by the s

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Embodiment Construction

[0016] Below in conjunction with embodiment the present invention is described in further detail.

[0017] 1) CO 2 Selection and preparation of absorbent lye: choose NaOH as CO 2 Absorb liquid, add antifreeze, first prepare the mixed solution of absolute ethanol and carbon dioxide-free distilled water as "antifreeze", the preparation ratio is 4:6 by volume, then weigh 4.0g NaOH and dissolve in the "antifreeze", Set the volume to 1L, which is 0.1mol / L sodium hydroxide absorption solution.

[0018] 2) Preparation of other reagents and solutions:

[0019] Configuration of 0.05mol / L hydrochloric acid solution: Dissolve 4.2mL of concentrated HCl in 800mL of distilled water, set the volume to 1000mL, and use anhydrous Na 2 CO 3 Used as reference material to calibrate HCl solution;

[0020] The configuration of 1mol / L barium chloride solution: weigh 244.0g and dissolve in carbon dioxide-free distilled water, and dilute to 1L;

[0021] Configuration of phenolphthalein ethanol in...

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Abstract

The invention relates to in-situ monitoring of soil respiration amount and in particular relates to a freeze prevention method for CO2 absorption liquid for in-situ winter soil respiration sample plot monitoring. Freeze prevention liquid is added into the absorption liquid for the in-situ soil respiration amount monitoring; the CO2 absorption liquid for the in-situ winter soil respiration sample plot monitoring can absorb CO2 in a field in a northeast place at the temperature below 0 DEG C. According to the freeze prevention method, anhydrous ethyl alcohol which is low in cost, low in ice point and readily available is used as a freeze prevention agent; the ice point of a mixed solution can be reduced only by adding a certain proportion of the anhydrous ethyl alcohol into the original absorption alkaline liquid, and the CO2 absorption liquid for the in-situ winter soil respiration monitoring can be prevented from being frozen.

Description

technical field [0001] The invention relates to the in-situ monitoring of soil respiration, in particular to a CO 2 Antifreeze method of absorbing liquid. Background technique [0002] Soils are the largest carbon pool in terrestrial ecosystems and play a role in regulating the global carbon cycle with atmospheric CO 2 The important function of source and sink, its small changes will affect the atmospheric CO 2 concentration, and has been paid more and more attention. Soil respiration is the exchange of CO between the soil and the atmosphere 2 The process is the result of soil carbon assimilation and dissimilation balance. Studies have shown that CO released by soil respiration in terrestrial ecosystems 2 The amount is about 50-76PgC per year, which is about 1 / 10 of the atmospheric carbon pool, which is the cause of atmospheric CO 2 One of the main causes of global warming due to the increase in concentration. As a key biological process in the carbon cycle of the ear...

Claims

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Application Information

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IPC IPC(8): G01N33/24
Inventor 孙学凯范志平曾德慧
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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