Preparation and use method of a micro-extraction carbon rod based on surface molecular imprinting

Abstract

The invention discloses preparation and use methods of microextraction carbon rod based on surface molecular imprinting, aiming at micro-pollutants in a water environmental sample with complex matrixes. A carbon fiber rod material is preferably selected as an effective vector of a molecular imprinting material, the use size of the carbon fiber rod material is optimally selected, and a synthetic method for a surface molecular imprinting material of the carbon rod is developed through the combination of the property of the carbon rod material, and a product prepared by virtue of the synthetic method can be applied to the solid phase microextraction of complex matrix samples in the environment. The carbon fiber rod material selected in a device has the characteristics of high mechanical strength and selectable size, and a molecular imprinting technique combined with the carbon fiber rod material has the advantages that the selectivity is relatively high, and the matrix interference is effectively inhibited in the application process of sample pretreatment. Due to the effective combination of the carbon fiber rod material and the molecular imprinting technique, the problems that a traditional solid phase microextraction sampling head is easy to damage and expensive in price, the matrix interference is serious during the treatment of complex matrix samples, and the like can be effectively solved, so that the precision of the microextraction process can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to a method for preparing and using a solid-phase microextraction carbon rod based on surface molecular imprinting technology for trace pollutants in water environment samples with complex matrices. Background technique [0002] The currently used solid phase microextraction device (Solid Phase Micro Extraction, SPME) generally uses a quartz fiber coated with a broad-spectrum coating as the extraction head to enrich and purify the target substance in the sample, and then after elution A device for analysis and testing using liquid chromatography or directly using gas chromatography. This device relies on the balanced distribution of the target substance between the sample solvent and the coating to achieve the enrichment of the target substance. And this device is generally small and easy to damage in the process of use simultaneously, and the price is comparativel...

AI Technical Summary

Problems solved by technology

And this kind of device is generally small and easy to be damaged in the process of using at the same time, and the price is comparatively expensive

In addition, when using this device to extract complex matrix samples in the environment, other substances in the sample matrix can easily form a competitive relationship with the target pollutants, resulting in the device not being able to effectively enrich and purify the target pollutants, resulting in Inaccurate detection of target pollutants in samples, or even undetected phenomena

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