One-dimensional nano-array zinc oxide solid-phase micro-extraction coating and preparation method thereof

Abstract

The invention provides a one-dimensional nano-array zinc oxide solid phase micro-extraction coating and a preparation method thereof. The one-dimensional nano-array zinc oxide solid phase micro-extraction coating of the invention is a one-dimensional nano-array zinc oxide coating covering the fiber of an extraction head, and the coating is prepared by a hydrothermal method to directly generate the one-dimensional nano-array zinc oxide coating on the solid phase micro-extraction fiber. The one-dimensional nano-array zinc oxide coating of the invention fully utilizes the particular characteristics of nano materials, thus greatly improving the extraction capacity, and significantly improving the selectivity of the coating extraction; the preparation method has strong operability, and the coating prepared by the method has good thermal stability and surface evenness.

Description

technical field [0001] The invention belongs to the interdisciplinary technical field of analytical chemistry and material science, and more specifically relates to a one-dimensional nano-array zinc oxide solid-phase microextraction coating and a preparation method thereof. Background technique [0002] SPME is a solvent-free extraction technology that integrates sampling, extraction, enrichment, and sample introduction developed by Pawliszyn of the University of Waterloo in Canada in the late 1980s. It can be directly combined with gas chromatography or high performance liquid chromatography. For analysis and detection, it has been commercialized by Supelco Company of the United States in 1993. Its device is similar to a micro-sampler of gas chromatography. The extraction head is coated with a solid-phase microextraction coating on a quartz fiber, and the coat is Thin stainless steel tube to protect the quartz fiber from being broken, and the fiber head can be stretched in ...

AI Technical Summary

Problems solved by technology

SPME coating is the core of SPME technology. At present, seven kinds of commercial coatings have come out, but their extraction capacity and extraction selectivity still need to be developed. Therefore, many scholars have begun to develop new SPME coatings for different analysis systems, in order to To improve extraction capacity and selectivity, non-commercialized SPME coatings are generally various polymer coatings, and their production methods are mainly electrodeposition, sol-gel, direct adhesion of high-temperature epoxy resin, and synthetic molecular imprinting coating methods. Its extraction mechanism is still an adsorption or distribution mechanism; at present, many studies on new SPME coatings are devoted to improving their selectivity or extraction capacity, but few reports focus on the improvement of coating selectivity and extraction capacity at the same time, while limiting the SPME coating. The fundamental reason for the extraction capacity of the coating is that the adsorption is mainly two-dimensional plane adsorption rather than three-dimensional three-dimensional adsorption, the longitudinal part (main part) of the coating is not fully utilized, and at the same time, the disorder of the coating material The arrangement also limits the improvement of the extraction capacity of SPME. Therefore, the only way to greatly increase the extraction capacity of the coating is to prepare a three-dimensional adsorption coating.

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