Preparation and application of alginic acid polymer coated Fe3O4@C18 magnetic nano solid phase extractive agent

Abstract

The invention belongs to the field of chemical analysis test instruments, and relates to a Fe3O4 magnetic nanometer solid-phase extractant which is coated by alginic acid polymers and modified by C18 silane. The extractant has the magnetic separation ability of the magnetic material, strong extraction ability of the C18 and good hydrophilic property, an ion channel and size extrusion functions of the alginic acid polymer, so that the extractant is quite suitable for the large-scale batch pre-treatment of water sample with large volume. The pollutants of alkyl phenol, phthalate ester, polycyclic aromatic hydrocarbon, full fluorine, and the like are taken as representatives of common pollutants in the water sample. For 500mL of environmental water sample, 0.1g of the extractant is used, and the efficiency of extracting the organic pollutants all reaches more than 85 percent.

Description

technical field

[0001] The invention belongs to the field of chemical analysis testing instruments and equipment, and relates to a novel C18 silane-modified Fe coated with alginic acid polymer 3 o 4 Nano solid-phase extraction agent, which is used as a sample pretreatment material to enrich organic pollutants in large-volume environmental water samples. Background technique

[0002] The background and development status of this technical field are roughly as follows: Solid phase extraction is a relatively new environmental sample pretreatment method widely used at present. Solid phase extraction has the advantages of short extraction time, high recovery rate, high enrichment factor and low reagent consumption. Nanomaterials have a high specific surface area and excellent adsorption performance, but due to the fineness of the nanoparticles, it is difficult to carry out the above-mentioned solid-phase extraction and pass through the column. C18 silica gel is a commonly used...

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