Immobilized membrane for synchronously enriching phosphor and ferrum and preparation method thereof

A production method and technology for fixing membranes, applied in chemical instruments and methods, preparation of samples for testing, and other chemical processes, etc., can solve problems such as failure to achieve simultaneous fixation and mutual interference, and achieve stable shape and high enrichment capacity. , the effect of production process optimization
CN104043409AInactive Publication Date: 2014-09-17NANJING INST OF GEOGRAPHY & LIMNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING INST OF GEOGRAPHY & LIMNOLOGY
Publication Date
2014-09-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

Provided is an immobilized membrane for synchronously enriching phosphor and ferrum. The immobilized membrane is a gel film which is prepared from a film-forming liquid in a gelling manner, wherein the film-forming liquid comprises zirconium hydroxide hydrate, Chelex-100 cation exchange resin and polyacrylamide. A preparation method of the immobilized membrane includes following steps: fully a mixing zirconium hydroxide hydrate powder, the Chelex-100 cation exchange resin and a polyacrylamide aqueous solution together to obtain a uniform membrane liquid, adding an appropriate amount of Tetramethylethylenediamine and ammonium persulfate, filling a glass mould with the membrane liquid, placing the glass mould horizontally at a low temperature of 2-4 DEG C for enabling zirconium hydroxide hydrate and Chelex to be freely precipitated, performing a heating process to 45+ / -5 DEG C and laying the glass mould up until the membrane liquid gels into a membrane. The immobilized membrane can synchronously enrich phosphor and ferrous ions with a high enriching capacity and can be used for a high resolution synchronous analysis of the phosphor and the ferrous ions in an environmental sample.
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Description

technical field

[0001] The present invention relates to a fixed film in thin film diffusion gradient technology (Diffusive gradients in thin films, DGT) and its preparation method, which is suitable for the enrichment and analysis of phosphorus and iron in environmental media, especially relates to a simultaneous enrichment in environmental analysis A fixed film for collecting phosphorus and iron and a method for making the same. Background technique

[0002] Both phosphorus and iron are important biogenic elements in the aquatic environment. Phosphorus is a key limiting element that causes eutrophication in water bodies. The increase of phosphorus content in water bodies is the main reason for the excessive growth of cyanobacteria and the formation of algal blooms. Iron-bound phosphorus is one of the main forms of phosphorus in sediments and flooded soils. The phosphorus is adsorbed on the surface of (hydr) iron oxide. When the iron oxide is reduced to ferrous iron under ...

Claims

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