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Sample processing device for soil heavy metal detection and processing method thereof

A sample processing and soil sample technology, applied in the field of soil detection, can solve the problems of rough processing, low efficiency, and affecting the accuracy of soil heavy metal detection, and achieve the effect of complete digestion, good processing effect and novel structure

Active Publication Date: 2019-11-22
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, at present, the pretreatment of soil samples is usually carried out manually by operators, which is inefficient and rough, and improper treatment will affect the accuracy of soil heavy metal detection. Therefore, a sample processing device and its processing method for soil heavy metal detection are designed. very necessary

Method used

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  • Sample processing device for soil heavy metal detection and processing method thereof
  • Sample processing device for soil heavy metal detection and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] Example: such as figure 1 As shown, a sample processing device for heavy metal detection in soil mainly includes a hopper 1, a screening device 2, a pretreatment device 3, a distribution device 4, a sample rack 5 and a digestion device 6, and the hopper 1 is used for dissolving the soil Sampling is sent to the screening device 2, the hopper 1 is provided with a screen 11 for removing larger impurities in the soil, and the outside of the hopper 1 is provided with a vibrator 12 at the position corresponding to the screen 11.

[0028] The screening device 2 includes a separation base 21 for separating the soil from the plant residues in the soil and charging the plant residues. The separation base 21 is made up of two vibration plates 211, and the outside of the vibration plates 211 is provided with a control vibration plate 211 rotation Two rotating motors 212, two electromagnetic devices 213 that are connected to each other are respectively provided at the joints of the ...

experiment example

[0040] The purpose of the experiment: To study the effect of the processing device provided in the implementation on the test results of soil samples.

[0041] Experimental conditions: A soil sample taken from the same place was divided into two parts on average. The first part was processed with the processing device provided in the example, and the second part was processed by manually picking out plant residues in the soil and manually digesting them. The same test was carried out on the two treated soil samples, and the test results were analyzed. The experimental results are shown in Table 1.

[0042] Table 1 Detection table of different treatment methods

[0043]

[0044] Conclusion: Using the device provided in this embodiment to pretreat the soil before testing will not affect the accuracy of the testing results, save time and effort, and have a high degree of automation.

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Abstract

The invention discloses a sample processing device for soil heavy metal detection and a processing method thereof. The processing device comprises a hopper, a screen-out device, a preprocessing device, an allocation device, a sample rack and a digestion device. The screen-out device comprises a separating base, a positive electrode suction device, a screen-out fan and a collecting groove. The preprocessing device comprises a drying chamber, an electric heating wire, a lifting crushing screen and a sample suction port. The suction pump of the allocation device is connected with the sample suction port through a pipeline. The allocation device is connected with a metering valve. The sample rack comprises a rotating base used for rotating the sample rack at a fixed angle. A plurality of sample tubes are circumferentially arranged on the rotating base. An ultrasonic generator is arranged at the connection between the sample tubes and the rotating base. The digestion device comprises a storage tank and a digestion liquid peristaltic pump. In a word, the sample processing device has the advantage of novel structure, perfect method, good processing effect, small detection error and the like.

Description

technical field [0001] The technical field of soil detection of the present invention particularly relates to a sample processing device and processing method for soil heavy metal detection. Background technique [0002] The heavy metals mentioned in terms of environmental pollution actually mainly refer to metals or metalloids such as mercury, cadmium, lead, chromium, and arsenic, as well as general heavy metals with certain toxicity, such as copper, zinc, nickel, cobalt, and tin. [0003] The purpose of soil sample pretreatment is to make the form and concentration of the component to be measured in the soil sample meet the requirements of the soil heavy metal determination method, and to reduce or eliminate the interference of coexisting components. The pretreatment methods of soil samples mainly include decomposition method and extraction method. The decomposition method is used for the determination of elements, and the extraction method is used for the determination o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 冯艳红张亚王国庆郑丽萍应蓉蓉杜俊洋李勖之孙丽李敏
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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