Seawater heavy metal multi-channel pretreatment device and method
A heavy metal, multi-channel technology, applied in seawater treatment, water/sewage treatment, extraction water/sewage treatment, etc., can solve the problems of low pretreatment efficiency, narrow selection range, complicated invention structure and operation steps, etc.
Active Publication Date: 2020-10-02
自然资源部第四海洋研究所
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Problems solved by technology
After retrieval, there are already some patents on devices and methods for the flow injection pretreatment of seawater heavy metals, and some commercialized flow injection systems have also appeared one after another, but most of them have only one channel, and the pretreatment efficiency is low; a few have two channels The structure and operation steps of the invention are relatively complicated, and can only deal with some traditional heavy metal elements, and the selection range is narrow
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[0030] see figure 1 , a seawater heavy metal multi-channel pre-treatment device provided in an embodiment of the present invention, such as figure 1 As shown, the device includes a sampling unit, a heavy metal enrichment unit, a flow switching unit 1, a heavy metal elution unit, and a sample receiving unit; the heavy metal enrichment unit includes multiple sets of extraction mechanisms 2 that can realize solid phase extraction, The sample receiving unit includes a plurality of eluent receiving bottles 3 and at least one waste liquid receiving bottle 4 having the same number as the plurality of groups of extraction mechanisms 2; each unit can be made of non-metallic material, which can reduce the impact on seawater Sample contamination.
[0031] The flow path switching unit 1 is used to switch between the first flow path state and the second flow path state.
[0032] In the state of the first flow path, the sampling unit is used to supply different seawater samples to be trea...
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The invention discloses a seawater heavy metal multi-channel pretreatment device and method. The device comprises a sample injection unit, a heavy metal enrichment unit, a flow path switching unit, aheavy metal elution unit and a sample receiving unit. According to the seawater heavy metal multi-channel pretreatment device and method provided by the invention, the device is simple to assemble andlow in cost; a plurality of solid-phase extraction units are adopted, so that a plurality of seawater samples can be treated at the same time without mutual interference, and the pretreatment efficiency is greatly improved; the solid-phase extraction mechanism can adsorb various heavy metals and is wide in selection range; the parts, in contact with the samples and a reagent, of the whole deviceare made of non-metal materials, the samples and the reagent are conveyed in a closed pipeline, and pollution is extremely low; the device and the pretreatment method can be controlled to run by computer software, consume few samples and reagents, and are easy to operate.
Description
technical field [0001] The invention relates to the technical field of seawater heavy metal content detection, in particular to a seawater heavy metal multi-channel pretreatment device and method. Background technique [0002] Due to the extremely low content of heavy metal elements in seawater, and the salt content of seawater can reach 35 g kg -1 , the direct measurement with the instrument not only has a low signal, but also the high-salt matrix will interfere with the determination and block the sampling system. Therefore, how to efficiently enrich and separate metals in seawater samples is the key. At present, the commonly used pretreatment methods for heavy metals in seawater are as follows: 1) solvent extraction; 2) coprecipitation; 3) solid phase extraction; 4) flow injection. Among them, flow injection is mainly to automate the time-consuming, tedious and easy-to-contaminate manual sample pretreatment methods (such as solid phase extraction), which not only saves ...
Claims
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IPC IPC(8): C02F1/28C02F1/42C02F1/26G01N1/28G01N1/40C02F101/20C02F103/08
CPCC02F1/28C02F1/285C02F1/42C02F1/26G01N1/4055G01N1/28G01N2001/4061C02F2001/427C02F2103/08C02F2101/20Y02P10/20
Inventor 朱祖浩粟启仲章臻
Owner 自然资源部第四海洋研究所