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Soil or settlement soluble iron in-situ sampling device and in-situ sampling and testing method thereof

A sampling device and sediment technology, which is applied in the direction of sampling device, material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, can solve the problem of low accuracy of measurement results, inability to be stable at the same time, Large destructive problems, to avoid valence changes, improve accuracy, and save time

Inactive Publication Date: 2010-12-15
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the destructiveness of the traditional in-situ sampling and determination method of soluble iron, which takes a long time and cannot stabilize Fe simultaneously. 2+ and Fe 3+ , the problem of low accuracy of the determination results, and then provide an in-situ sampling device and in-situ sampling and determination method for soil or sediment soluble iron

Method used

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  • Soil or settlement soluble iron in-situ sampling device and in-situ sampling and testing method thereof
  • Soil or settlement soluble iron in-situ sampling device and in-situ sampling and testing method thereof
  • Soil or settlement soluble iron in-situ sampling device and in-situ sampling and testing method thereof

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specific Embodiment approach 1

[0019] Specific implementation mode one: combine Figure 1-Figure 3 Describe this embodiment mode, a kind of in-situ sampling device of soil or sediment soluble iron in this embodiment mode consists of a stainless steel drill bit 1, a pottery clay water collection pipe 2, a first stainless steel pipe 3, a second stainless steel pipe 4, a plastic suction pipe 5, a plastic The suction pipe 6, the handle 7, the suction pipe interface valve 8, the suction pipe interface valve 9 and the suction device 10, the stainless steel drill bit 1 is fixedly installed on the lower end surface of the pottery clay water collection pipe 2, and the second stainless steel pipe 4 is fixedly installed On the upper end surface of the clay water collecting pipe 2, a plurality of water inlet holes 3-1 are evenly opened on the pipe wall of the first stainless steel pipe 3, and the first stainless steel pipe 3 is coated on the outer wall of the clay water collecting pipe 2, so that Said rotary handle 7 i...

specific Embodiment approach 2

[0021] Specific implementation mode two: combination Figure 1-Figure 3 To illustrate this embodiment, the steps of a method for in-situ sampling and determination of soil or sediment soluble iron in this embodiment are:

[0022] Step 1. Press the rotary handle 7 at the sample point to be tested, and the stainless steel drill bit 1 cooperates with the clay water collection pipe 2 to drill into the soil or sediment to a certain depth; the specific depth depends on the sampling depth when the sample is taken. For example, the depth is 5cm, 10cm, 20cm or 40cm;

[0023] Step 2, close the suction pipe interface valve 9, connect the aspirator 10 with the plastic suction pipe 5 through the suction pipe interface valve 8, and extract the air in the clay water collection pipe 2 to obtain negative pressure;

[0024] Step 3, close the valve 8 of the suction pipe interface, and collect 40-50 mL of pore water in the soil or sediment;

[0025] Step 4, respectively configuring EDTA and BPD...

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Abstract

The invention discloses a soil or settlement soluble iron in-situ sampling device and an in-situ sampling and testing method thereof, which relate to a soil or settlement soluble iron sampling device and a sampling and testing method thereof. The method solves the problems of high destructiveness, long time consumption, incapability of stabilizing Fe<2+> and Fe<3+> at the same time and low measurement result accuracy of the conventional soluble iron in-situ sampling and testing method. In the sampling device of the invention, a stainless steel drilling bit, a china clay water collecting tube and a second stainless steel are arranged from bottom up; and a plastic exhaust pipe and a plastic water draining pipe are inserted into a second stainless steel pipe. The method comprises the following process steps: drilling a sampling point with the drill bit; exhausting air to produce negative pressure; waiting for collecting water; preparing a color-developing agent; absorbing the color-developing agent and pore water; injecting into a brown ground glass stoppered bottle; measuring the Fe<2+> content by using a colorimetric method; measuring the total iron content by using the colorimetric method; and obtaining the Fe<3+> content by substracting the Fe<2+> content from the total iron content. The device and the method are suitable to be used in soil or settlement soluble iron in-situ sampling and test techniques.

Description

technical field [0001] The invention relates to a soil or sediment soluble iron sampling device and a sampling and determination method thereof. Background technique [0002] Soluble iron in soil solution and sediment pore water is sensitive to environmental changes and participates in many material transformation processes in soil and sediment (such as migration of soluble substances, dissolution of minerals, dissolution of organic substances, etc.) Decomposition and synthesis, etc.), play a certain role in controlling the geochemical cycle of other trace elements and nuclides. Existing studies have shown that when the concentration of soluble iron increases to a certain extent, it can lead to plant poisoning, increase of pH value of soil solution, replacement of cations on soil crystal exchange sites, and increase of solubility of phosphorus and silicon, etc. as a result of. Therefore, accurate determination of soluble iron in soil or sediment has become one of the found...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/14G01N21/78
Inventor 邹元春姜明吕宪国
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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