Nitrate nitrogen leaching method in a kind of soil

A nitrate nitrogen extraction technology, applied in the direction of solid solvent extraction, test sample preparation, etc., can solve problems such as inability to extract nitrate nitrogen, blockage of pipelines by potassium chloride, and adverse environmental effects, so as to avoid Adverse effects, elimination of pollution, good effect of leaching effect

Inactive Publication Date: 2011-12-28
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, due to the salt effect (salt effect), the potassium chloride leaching solution cannot completely extract the nitrate nitrogen in the soil ("Research on the joint water-salt stress effect and water efficient use of crops", Shi Haibin et al., Beijing, China Water Conservancy and Hydropower Press 2009.1)
In addition, since the potassium chloride extract is a high-concentration salt solution, if the sample is not washed with a

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nitrate nitrogen leaching method in a kind of soil
  • Nitrate nitrogen leaching method in a kind of soil
  • Nitrate nitrogen leaching method in a kind of soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1 An improved method for leaching nitrate nitrogen in soil provided by the present invention has been practiced and applied in experiments.

[0009] The improved method for extracting nitrate nitrogen in a kind of soil provided by the invention, the steps are as follows:

[0010] (1) Sample weighing: Weigh 8 samples of 5.00 g respectively and put them into 50 mL plastic bottles;

[0011] (2) Extraction: Add 25mL of distilled water respectively, place on a shaker at 200 rpm and shake for 30min, take it off after shaking, filter with filter paper, and collect the filtrate in 25mL colorimetric tubes;

[0012] (3) Determination: The filtrate in each colorimetric tube is determined with a SAN++SKALAR continuous flow analyzer.

[0013] (4) The measurement results are shown in Table 1.

[0014] Table 1

[0015]

[0016] The existing measuring method of nitrate nitrogen in the soil with potassium chloride solution leaching of comparative example 1, the steps are a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a method for leaching nitrate nitrogen in soil, which is suitable for leaching nitrate nitrogen in soil samples, and distilled water is used instead of potassium chloride solution to obtain the content of nitrate nitrogen in soil. On the basis of ensuring the accuracy of the data, the experimental cost is saved; the damage to the instrument by the potassium chloride solution is effectively avoided. The salt effect is effectively avoided, and the extraction effect is better. It is proved by experiments that the extraction efficiency is increased by 11.1% to 34.2%. The adverse effect of potassium chloride on the environment is avoided, which is conducive to reducing and eliminating pollution from the source, and conforms to green chemistry.

Description

technical field [0001] The invention relates to a method for leaching nitrate nitrogen in soil. Background technique [0002] Nitrate nitrogen is a soil nutrient, which reflects the change degree of nutrients in the soil at different times. Now, the nitrate nitrogen in the soil is leached with potassium chloride solution, and the nitrate nitrogen is measured with a continuous flow analyzer. The principle of the method is that the nitrate in the extraction solution is reduced to nitrite through the red copper-plated cadmium column with the ammonium chloride solution as the substrate, and it forms a red azo chromophore with the diazonium compound agent and the coupling reagent, and the red intensity is the same as The nitrate nitrogen content is directly proportional. First of all, due to the salt effect (salt effect), the potassium chloride leaching solution cannot completely extract the nitrate nitrogen in the soil ("Study on the Combined Water-salt Stress Effect and Water...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N1/34B01D11/02
Inventor 张玉霞张少庆王国平
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap