Microwave-assisted Soxhlet and solid-phase extraction coupling device, microwave-assisted Soxhlet and solid-phase extraction coupling method and application of microwave-assisted Soxhlet and solid-phase extraction coupling

Abstract

The invention discloses a microwave-assisted Soxhlet and solid-phase extraction coupling device, a microwave-assisted Soxhlet and solid-phase extraction coupling method and application of microwave-assisted Soxhlet and solid-phase extraction coupling. The microwave-assisted Soxhlet and solid-phase extraction coupling device comprises a microwave-assisted extractor, a Soxhlet extractor, solid-phase adsorbents, an extraction bottle, a reflux condensing pipe and the like, and extraction and purification are synchronously completed by means of coupling microwave-assisted Soxhlet extraction and solid-phase extraction. When in extraction, the solid-phase adsorbents are filled into a Soxhlet extraction device, the extraction bottle is directly placed in the microwave-assisted extractor for extraction after extraction solvents are added into the extraction bottle, analytes are collected into the extraction solvents, and interfering components in samples are adsorbed by the solid-phase adsorbents. High efficiency of microwave-assisted extraction, universality of Soxhlet extraction and high selectivity of solid-phase extraction are combined, the device is simple and convenient in operation, is conveniently used with an analysis instrument, and is suitable for extraction and purification of trace organics in complicated samples.

Description

technical field [0001] The invention belongs to the field of analytical chemical sample pretreatment, and specifically relates to a microwave-assisted Soxhlet solid-phase extraction combined device, method and application, which is suitable for the extraction and purification of trace organic substances in complex samples such as environment, food, medicine and biology. Background technique [0002] Microwave-assisted Soxhlet extraction (MASE) combines the advantages of microwave heating and Soxhlet extraction, eliminating the need for separation steps such as filtration or centrifugation. Since 1998, three different focused microwave-assisted Soxhlet extraction devices have been developed. The first device is proposed by French Prolabo Company. The extraction solvent is heated by electricity and does not depend on the polarity of the solvent. However, due to the limitation of the length of the glass instrument, this device cannot use high boiling point solvents. The second...

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Problems solved by technology

[0004] The present invention aims at overcoming the disadvantages of poor selectivity of microwave-assisted Soxhlet extraction and pre-treatment of solid and semi-solid samples for solid-phase extraction, and designs a microwave-assisted Soxhlet solid-phase extraction combined device, which combines microwave-assisted Soxhlet extraction The advantages of fast, efficient and high selectivity of solid phase extraction, complete the extraction and purification of analytes at the same time, simplify the operation steps, reduce sample loss and error, and improve precision and accuracy

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