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Infrared spectroscopy-based rapid device special for soil nitrate nitrogen and using method thereof

A special device, infrared spectroscopy technology, applied in measurement devices, material analysis by optical means, instruments, etc., can solve the problems of inability to qualitatively and quantitatively analyze nitrate nitrogen content, complex soil spectral information, lack of extraction and analysis, etc.

Inactive Publication Date: 2017-05-31
INST OF SOIL SCI CHINESE ACAD OF SCI
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Problems solved by technology

However, the commercially available mid-infrared Fourier transform attenuated total reflection spectrometer has a wavelength range of 4000-400cm -1 range, the collected soil spectral information is extremely complex, and due to the lack of corresponding chemometric models to extract and analyze the spectral information, it is impossible to directly conduct qualitative and quantitative analysis of the nitrate nitrogen content, let alone directly display the content of soil nitrate nitrogen in the soil. content, it cannot be directly extended to the grassroots departments of agriculture

Method used

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  • Infrared spectroscopy-based rapid device special for soil nitrate nitrogen and using method thereof
  • Infrared spectroscopy-based rapid device special for soil nitrate nitrogen and using method thereof
  • Infrared spectroscopy-based rapid device special for soil nitrate nitrogen and using method thereof

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Embodiment 1

[0074] Example 1, a special device and method for rapid and non-destructive determination of soil nitrate nitrogen based on mid-infrared total reflection spectroscopy.

[0075] The invention includes a quick and non-destructive measuring device for soil nitrate nitrogen, including the following modules:

[0076] figure 1 It is a graphic illustration of a special device for rapid and non-destructive determination of soil nitrate nitrogen. The device comprises: a soil sample pool module 1, an excitation light source module 2, mirrors 3 and 5, an ATR crystal module 4, a detector module 6, a modeling system module 7 and a result display window module 8; wherein the soil sample pool module 1. It is used to place soil paste samples. The standard line of soil volume and water volume are marked on the sample pool, which can be used to maintain the water-soil ratio of adding soil samples and water respectively; turn on the excitation light source module 2, and the laser emits light in...

Embodiment 2

[0106] 1. Collect red soil samples, all of which are 0-20cm surface soil. The collected samples are air-dried, ground and passed through a 2mm hole sieve. The samples were divided into 18 standard sample sets and 78 unknown nitrate nitrogen concentration sample sets;

[0107] 2. Using chemical analysis method to detect the nitrate nitrogen content of a series of paddy soil samples added with nitrate nitrogen gradient solution. The specific method is: weigh 5.00g of air-dried red soil, add different concentrations of KNO 3 The concentrations of 5 mL of the solution were (standard solutions of 0 mg / kg, 20 mg / kg, 40 mg / kg, 60 mg / kg, 80 mg / kg, and 100 mg / kg), and repeated 3 times. Then add 2mol L -1 KCl solution leaching (water-to-soil ratio: 10:1), take out after shaking for 1 hour, let stand for 30 minutes, and filter. The filtrate was drawn and measured by a fully automatic intermittent chemical analyzer (Smartchem200, Italy) to obtain the chemical reference value of the nit...

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Abstract

The invention discloses an infrared spectroscopy-based rapid device special for soil nitrate nitrogen and a using method thereof. The device comprises a soil sample cell module, an excitation light source module, a detector module, a modeling system module, a result display window module and operating button modules, wherein the soil sample cell module is used for storing soil pasty samples; the excitation light source module is used for transmitting an intermediate infrared laser light source signal; an ATR (Attenuated Total Reflection) crystal module is in a diamond interface; the modeling system module is used for receiving and processing spectroscopic data information and carrying out modeling, optimizing and quantitative calculation on the content of nitrate nitrogen; the result display window module is used for carrying out digital display on the content of the nitrate nitrogen; the button modules I, II, III and IV are respectively used for sampling an ATR spectrum, saving a model algorithm, calculating an optimal model algorithm and displaying results. The device disclosed by the invention is simple in operation and less in sample demands, samples are not required to be subjected to fussy pretreatment, the detection speed is fast, no chemical reagents are used, the whole process just requires several minutes, and the device is suitable for fast sampling detection in a field and a scene.

Description

technical field [0001] The invention belongs to the field of agricultural soil detection methods, and in particular relates to a rapid special equipment for soil nitrate nitrogen based on infrared spectrum and a use method thereof. Background technique [0002] Nitrogen is an important element for crop growth and development, and is also a key element for regulating the production, structure and function of terrestrial ecosystems. The nitrogen cycle in soil mainly includes nitrogen fixation, ammonification, nitrification and denitrification, and biological sequestration. The increase in nitrogen fertilizer application in recent years has strengthened the nitrogen cycle in various pathways, not only causing nitrogen loss, but also exacerbating air pollution, soil acidification, loss of biodiversity and degradation of aquatic ecosystems. [0003] Soil nitrate nitrogen is an important form of nitrogen in the soil and the main form of nitrogen absorbed by crops. Its content is o...

Claims

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Application Information

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IPC IPC(8): G01N21/552G01N21/3563
CPCG01N21/3563G01N21/552G01N2021/3572G01N2201/06113
Inventor 杜昌文马菲周健民
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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