Preparation method of solid phosphate ion electrode based on aluminum and aluminum phosphate

Abstract

The invention discloses a preparation method of a solid phosphate electrode based on aluminum and aluminum phosphate. The preparation method comprises the following steps of 1) placing an aluminum conductor sequentially in acetone and diluted acid for washing, and drying the aluminum conductor after being washed; 2) preparing a phosphoric acid solution; 3) immersing the aluminum conductor as a working electrode, graphite as a reference electrode and a platinum (Pt) sheet as an auxiliary electrode in the phosphoric acid solution, forming white aluminum phosphate precipitate on the surface of the aluminum conductor by utilizing a cycling scanning potential method, placing the aluminum conductor in alcohol, and then airing the aluminum conductor; 4) preparing a cation screened film solution by utilizing reagent of the Sigma company; 5) utilizing the aluminum conductor which is wrapped by the aluminum phosphate to rapidly dip into the cation screened film solution, and inverting the aluminum conductor for airing; and 6) utilizing a thermoplastic pipe to wrap the middle-upper part of the aluminum conductor, which is not wrapped by the aluminum phosphate or the cation screened film to obtain the solid phosphate electrode. The solid phosphate electrode prepared by the preparation method has the advantages of low cost, high mechanical strength, high sensitivity, small size, rapid detection response, minimal detection lower limit, long service life and the like.

Description

technical field [0001] The invention relates to a method for preparing a solid phosphate root electrode based on aluminum and aluminum phosphate. Background technique [0002] Phosphoric acid and phosphate are commonly used food, chemical, and pharmaceutical raw materials, and are also important components of organisms and essential nutrients for life. The increase in the concentration of phosphate in the water environment will cause eutrophication of the water body and stimulate the growth of harmful algae. Harm to the ecological environment. Monitoring the concentration of phosphate in water is one of the main contents of ecological environment protection and environmental restoration. At present, most of the commonly used phosphate detection electrodes are liquid film electrodes, which are large in size and fragile, and are difficult to use in the actual environment for online observation and long-term monitoring. Contents of the invention [0003] The purpose of the ...

AI Technical Summary

Problems solved by technology

At present, most of the commonly used phosphate detection electrodes are liquid film electrodes, which are relatively large and fragile, and are difficult to use for online observation and long-term monitoring in the actual environment.

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