Device for extracting dissolved inorganic carbon and organic carbon in trace water sample and use method

Abstract

The invention provides a device for extracting dissolved inorganic carbon and organic carbon in a trace water sample and a using method thereof. The device comprises a reactor arranged at the bottom, a connecting pipe arranged on the side face of the reactor, a vacuum connecting valve arranged above the reactor and an acid storage device arranged on the connecting pipe, wherein an acid storage device valve is arranged at the bottom of the acid storage device, and is connected with the connecting pipe through a joint II, the outlet end of the vacuum connecting valve is connected with the reactor through a joint I, a silica gel plug is arranged at the inlet end of the vacuum connecting valve, a fine needle and a vacuum pipe are inserted into the silica gel plug, and the vacuum pipe is connected with a vacuum pump. According to the invention, dissolved inorganic carbon and organic carbon extraction is performed on a precious sample with a small volume, the joints with good leakproofness are adopted so as to avoid trace sample pollution caused by gas permeation in the reaction process, the volume of the reactor is reduced so as to reduce the possibility of gas leakage, the fine needle is additionally arranged at the vacuum joint so as to effectively control the amount of water entering the vacuum system, the structure is simple, sampling is convenient, and time is saved.

Description

technical field [0001] The invention belongs to the technical field of inorganic carbon extraction, and in particular relates to an extraction device and method for dissolving inorganic carbon and organic carbon in trace water samples. Background technique [0002] Effective prevention and control of air pollution must be based on understanding the main sources and chemical composition of air pollutants. The sources of air pollution in my country are diverse and the causes are complex. The discharge of organic pollutants and various nitrogen compounds accounts for a large proportion, and the rainfall process has the effect of removing pollutants in the atmosphere. Some studies in recent years have shown that the contents of dissolved organic carbon (DOC) and dissolved nitrogen (DN) tend to increase in rainfall in different regions of the world, and have become the main dissolved chemical components in rainfall. The transport of carbon during rainfall not only plays an impor...

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Problems solved by technology

[0003] Inorganic carbon and organic carbon ( 14 C) Extraction and testing are important links. The traditional dissolved inorganic carbon and organic carbon extraction devices are large in size, which can easily cause pollution for small precious samples such as rainwater, snow water, and ice. large, difficult to operate

In addition, the extraction process needs to be carried out in a vacuum, and a large amount of water is pumped into the vacuum line during the vacuuming process, which slows down the vacuuming speed and affects the extraction of the entire inorganic carbon and organic carbon.

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