Total-dissociation DGT combined film for determination of soil available phosphorus and preparation method thereof

A technology combining membrane and available phosphorus, applied in the direction of measuring devices, surface/boundary effects, instruments, etc., can solve problems such as unsuitable for on-site testing, time-consuming, complicated process of soil available phosphorus, etc., and achieve low preparation cost and simple production process , The effect of production process optimization
CN106568689AActive Publication Date: 2017-04-19TIANJIN TIANRUN YIKANG ENVIRONMENTAL PROTECTION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TIANJIN TIANRUN YIKANG ENVIRONMENTAL PROTECTION TECH CO LTD
Publication Date
2017-04-19

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Abstract

The invention relates to a total-dissociation DGT combined film for determination of soil available phosphorus and a preparation method thereof. The total-dissociation DGT combined film comprises the material composition: available phosphorus combined material nano Mg-Al-Fe-LDHs, a combined material dispersing agent, an acrylamide gel and the like. The above materials are uniformly mixed through ultrasonic treatment, and the mixture is pumped into a high-silica glass planar groove provided with a certain thickness of gaskets at periphery, after a mouth is sealed, a reaction is carried out for at least 1 h at the temperature of 42 to 46 DEG C, and the DGT combined film is prepared. The combined film material can highly efficiently and rapidly enrich available phosphorus, and can be completely dissociated within 30 min after 8 ml-10 ml of concentrated nitric acid is added; the combined film overcomes the disadvantages that a traditional DGT combined film is slow and incomplete to dissociate, difficult to prepare in laboratory, poor in generality, poor in phosphorus adsorption ability, high in price and the like.
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Description

technical field

[0001] The invention relates to a method for measuring available phosphorus in soil, in particular to a method for measuring available phosphorus in soil by film gradient diffusion technology of a solid bonded film made of nano Mg-Al-Fe-LDHs, an available phosphorus binding material. Background technique

[0002] As one of the main sources of plant nutrition, soil phosphorus plays an important role in plant growth. The early formation and survival of plant roots require sufficient phosphorus from the soil. However, with the intensification of a series of global changes such as the excessive use of phosphorus fertilizers and eutrophication of water bodies, people are more aware of the importance of farmland resources and the environment. Therefore, inventing a new method for measuring soil phosphorus, fertilizing rationally, and increasing the utilization rate of phosphorus fertilizer have far-reaching significance for improving crop yield and agricultural pro...

Claims

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