Multifunctional closed microwave extraction device, and using method and purpose thereof
An extraction device and multi-functional technology, which is applied in the field of multi-functional closed microwave extraction devices, can solve the problems of poor selectivity and solid-phase extraction that cannot be directly processed, and achieve fast mass transfer rate, high extraction and purification efficiency, improved precision and The effect of accuracy
Active Publication Date: 2016-04-27
CHINA TOBACCO YUNNAN IND
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Problems solved by technology
[0004] The present invention aims to overcome the defects of poor selectivity of closed microwave extraction and the inability of solid phase extraction to directly process solid samples, and designs a multifunctional closed microwave extraction device, which combines efficient and fast closed microwave extraction and high selectivity of solid phase extraction. Advantages, at the same time complete the steps of high-pressure extraction, purification, water removal, extraction liquid filtration, etc., simplify the operation steps, reduce sample loss, and improve precision and accuracy
Method used
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[0043] Example: A multifunctional closed microwave extraction device combined with gas chromatography-time-of-flight mass spectrometry (GC-TOFMS) was used to analyze pesticide residues in tobacco.
[0044] The specific operation is: add 60 mL of ethyl acetate-n-hexane (1:1, v / v) extraction solvent into a tank with an inner diameter of 4 cm and a height of 15 cm, and a sample holding cylinder with an inner diameter of 2.5 cm and a height of 5 cm Put a glass sand core sieve plate with a pore size of 30 μm, 2.0 g flori silica adsorbent, 1.0 g sample, and 0.5 g anhydrous sodium sulfate dewatering agent in sequence, compact it moderately, and place the filled sample holding cylinder Put it into the tank and align it with the solvent circulation channels, the number is 12, and the diameter is 2.5mm. Install the sealing pad, close the upper cover and put it into a microwave extractor for airtight microwave extraction. The microwave radiation power is 100W, the extraction pressure is ...
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The invention relates to a multifunctional closed microwave extraction device. The multifunctional closed microwave extraction device comprises a tank body (4), a sample accommodating barrel suspension disk (5) and a sample accommodating barrel (7), wherein an opening of the tank body (4) is sealed by an upper cover (3) through a sealing gasket (2); the sample accommodating barrel suspension disk (5) is of a circular ring structure and is arranged on the inner wall of the tank body (4) or integrated with the inner wall of the tank body (4); the sample accommodating barrel (7) is of a two-end opened cylindrical structure, the top end of the sample accommodating barrel (7) is provided with an outer flange to be supported on the sample accommodating barrel suspension disk (5), and the bottom end of the sample accommodating barrel (7) is provided with an inner flange and a porous sieve plate (12) supported on the inner flange. The invention also relates to a using method of the multifunctional closed microwave extraction device. The closed microwave extraction device provided by the invention combines high efficiency of closed microwave extraction, selectivity of solid-phase extraction and a filtration function, and the device is simple and convenient to operate, and suitable for high-efficient and quick extraction and purification of an organic matter in a sample in the fields of biology, food, environment, chemical industry, pharmacy and the like.
Description
technical field [0001] The invention belongs to the field of analytical chemical sample pretreatment, and in particular relates to a multifunctional airtight microwave extraction device, its use method and application, which is suitable for the extraction and purification of organic matter in samples in the fields of biology, food, environment, chemical industry, pharmacy and the like. Background technique [0002] Due to the advantages of high efficiency, strong selectivity, easy operation, few by-products and high yield, microwave extraction has been widely used in the fields of environment, food, industry, natural products and traditional Chinese medicine. According to the type of extraction tank, microwave extraction system can be divided into two categories: open atmospheric pressure type and closed high pressure type. Among them, the high-pressure type is to heat the solvent and the sample immersed in it in a high-pressure container, and the target component is extract...
Claims
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Login to View More IPC IPC(8): G01N1/34
CPCG01N1/34
Inventor 司晓喜刘志华朱瑞芝张凤梅刘春波陆舍铭申钦鹏何沛
Owner CHINA TOBACCO YUNNAN IND