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Device and method for in-situ collection of soluble substances

A collection device and soluble technology, applied in the field of in-situ collection devices for soluble substances, can solve the problems of slow sample collection speed, in-situ collection, insoluble substances, etc.

Active Publication Date: 2021-04-06
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another more important problem is that for soil samples with low water content, due to insufficient water, it often leads to difficulties such as slow sample collection and even inability to collect soluble substances in situ, and the operation of destructive sampling combined with ex situ extraction is often Changes in environmental conditions (such as temperature, pH, Eh, etc.) cannot reflect the release characteristics of dissolved substances under in situ environmental conditions

Method used

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  • Device and method for in-situ collection of soluble substances
  • Device and method for in-situ collection of soluble substances
  • Device and method for in-situ collection of soluble substances

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Experimental program
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Effect test

Embodiment 1

[0047] The invention provides an in-situ collection device for soluble substances in soil / sediment / groundwater with different depths and water contents, including:

[0048] Stainless steel bracket 1: such as figure 1 As shown, in order to increase the flexibility of use and the convenience of transportation, the stainless steel bracket 1 adopts a spliced ​​structure, and the overall bracket 1 is composed of the same unit bracket 11 (ie, a cubic unit), and a unit bracket 11 is made of a stainless steel plate with a thickness of 5mm like figure 1Shown cuboid support, unit support 11 is made of A, B, C, D four stainless steel plates, A, B are the rectangle of wide 4cm and long 100cm, and C, D face are the rectangle of wide 4cm and long 12cm, respectively open Two screw holes 113 and two slots 111 are arranged, and a threaded hole 112 with a diameter of 1 cm (that is, a sampling head installation hole) is opened every 20 cm on the A and B boards. The four boards are fixed into a...

Embodiment 2

[0053] The embodiment of the present invention proposes a method of in-situ injection-in-situ desorption-in-situ extraction and collection, which can realize in-situ extraction of soluble substances in soil samples with low moisture content.

[0054] For soil with low moisture content, use the method of in-situ injection-in-situ desorption-in-situ extraction sampling, use a professional soil drilling machine to drill holes, insert the sampler, backfill the soil in situ, and wait for the disturbed area for a long time recover. The method runs as Figure 5 As shown, the extraction reagent is injected in situ, and deionized water (or ultrapure water) or other extraction reagents (such as dilute salt, dilute acid, dilute alkali, etc.) are pumped into the microporous ceramic sampling head 2 through a peristaltic pump. Depending on the nature of the target, the extraction reagent is directly injected into the soil micro-area around the microporous ceramic sampling head 2 through th...

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Abstract

An in-situ collection device and method for soluble substances. The in-situ collection device for soluble substances includes: a bracket; a microporous ceramic sampling head in a tubular shape, and the microporous ceramic sampling head is fixed on the support for soluble substances The in-situ collection; the sampling tube, the sampling tube is connected with the microporous ceramic sampling head, and is used for transporting the collected material in the microporous ceramic sampling head. The invention utilizes the microporous ceramic sampling head and the support to realize in-situ collection of soluble substances in samples of different depths, and is convenient to further combine with an online analysis instrument to realize on-line analysis and real-time monitoring of target substances. In particular, for in-situ sampling of soil with low moisture content, the present invention proposes a sampling method of in-situ injection-in-situ desorption-in-situ extraction, so that the in-situ extraction and collection of soluble substances in low moisture content soil samples can be realized .

Description

technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to an in-situ collection device and method for soluble substances. Background technique [0002] As people pay more and more attention to environmental quality, the requirements for environmental monitoring are getting higher and higher. The traditional method of on-site sampling and transportation to laboratory analysis has been difficult to meet the needs of modern environmental monitoring. How to realize in-situ sampling-on-line analysis is one of the important challenges facing environmental analysis and monitoring, and the development of new in-situ sampling methods bears the brunt. In-situ sampling of soluble substances in soil, sediment or groundwater, such as soluble organic carbon (DOC), soluble organic nitrogen (DON), soluble phosphorus, soluble sulfur, nutrients, heavy metals, organic pollutants, etc., especially for sampling at different depths It is es...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/02G01N1/14
CPCG01N1/02G01N1/14
Inventor 吕继涛张淑贞罗磊
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI