Analysis pretreatment device for stable carbon isotopes in carbonate dissolved in water bodies

Abstract

The invention discloses an analysis pretreatment device for stable carbon isotopes in carbonate dissolved in water bodies. The analysis pretreatment device comprises a reagent bottle, a dryer, a valve, an injection pump, a one-way check valve, a high-purity nitrogen bottle, an electromagnetic valve I, an electromagnetic valve II, a reaction flask, a cold well, a vacuum pump, a gas collecting bottle, a magnetic stirrer and an isotope mass spectrometer. The reagent bottle is communicated with external atmosphere via a gas inlet tube; the reagent bottle is communicated with the reaction flask viaa liquid delivery tube; the reaction flask is communicated with the cold well via a gas delivery tube; the cold well is communicated with the vacuum pump, the gas collecting bottle and the isotope mass spectrometer via gas delivery tubes. The analysis pretreatment device has the advantages that CO2 gas in residual air in the analysis pretreatment device can be jointly removed by the aid of vacuumizing and purging processes, and accordingly interference on experimental results can be reduced; samples are stirred by the magnetic stirrer, accordingly, the reaction rate of phosphoric acid and soluble inorganic carbon can be increased on the premise that the gas tightness of the analysis pretreatment device is not destroyed, the reaction time can be shortened, and the analysis efficiency can be improved.

Description

technical field [0001] The invention relates to the field of geochemistry, in particular to a pretreatment device for analyzing stable carbon isotopes in carbonates dissolved in water bodies. Background technique [0002] The long-term interaction between rocks and air, water, carbon dioxide and other substances produces complex chemical reactions, and the process of producing new substances is called chemical weathering. 2 The long-term, never-ending process of consumption regulates global climate change on a million-year scale. The chemical weathering process represents a permanent atmospheric CO 2 In the process of migration to the ocean, there are two main chemical weathering processes of rocks that consume CO in the atmosphere 2 : Chemical Weathering of Silicate and Carbonatite. CO consumed by carbonatite weathering over a longer period of time 2 CO released by carbonatite deposition in the ocean 2 Offset, the chemical weathering process of silicate rocks net con...

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Problems solved by technology

[0004] Using experimental devices to study the stable carbon isotope ratio of dissolved carbonate in water can more accurately determine the source of dissolved carbonate in water, and more accurately study the global carbon cycle process. The existing device uses a vacuum method. Cannot completely remove CO in residual air 2 The impact on the experimental results, and the stirring of the sample under sealed conditions cannot be realized during the experiment, the chemical reaction rate is slow, and the analysis efficiency of the sample is low

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