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High-efficiency concentrated solution-liquid micro-extraction device and method capable of seamlessly combining chromatographic analysis

A chromatographic analysis and extraction device technology, which is applied in the field of high-efficiency concentrated liquid-liquid micro-extraction devices, can solve the problems of inaccessible samples, low extraction enrichment degree, large amount of extractant, etc., and reach the detection limit and determination limit The effect of reducing, increasing the concentration and enrichment factor, and simplifying the cumbersome degree of operation

Inactive Publication Date: 2019-07-19
郭治安
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Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a high-efficiency concentrated liquid-liquid micro-extraction device and method that can be seamlessly combined with chromatographic analysis. , to overcome the defects of the existing liquid-liquid extraction, such as large amount of extractant, serious pollution and waste, low degree of extraction and enrichment, the processed samples can not even reach the detection limit of the instrument, and it is difficult to operate continuously

Method used

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  • High-efficiency concentrated solution-liquid micro-extraction device and method capable of seamlessly combining chromatographic analysis
  • High-efficiency concentrated solution-liquid micro-extraction device and method capable of seamlessly combining chromatographic analysis
  • High-efficiency concentrated solution-liquid micro-extraction device and method capable of seamlessly combining chromatographic analysis

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preparation example Construction

[0104] 2. Sample Preparation

[0105] 2.1 Extractant a: n-hexane solution containing 1ul / 1ml of side mark and 0.5mg / ml of blue layering indicator. There is an internal standard method in chromatographic analysis, that is, quantitative and stable substances that can be separated from all peaks are added to the standard sample and sample for testing, in order to achieve a satisfactory test purpose. There is also an external standard method, that is, a method of testing after making a working curve with a standard sample.

[0106] In order to verify the extraction effect of the invention, correct the deviation of the chromatographic injection volume and the experimental deviation caused by the volatilization and concentration of a small amount of extractant in the follow-up operation after extraction balance, a reagent is added to the extractant in advance, and its performance requirements Soluble in extractant, insoluble in water, the chromatographic peak can be completely sepa...

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Abstract

The invention discloses a high-efficiency concentrated solution-liquid micro-extraction device and method capable of seamlessly combining chromatographic analysis. A trace extraction liquid collectionbottle is arranged at the upper end or the lower end of the device, since a micro-extraction bottle is connected through an extraction enrichment device with an opening gradually convergent, a sampleis automatically positioned on an upper layer or a lower layer after extracted and layered, the collecting effect of an extracting solution containing a high-concentration component can be greatly improved through further enrichment by the extraction enrichment device, the concentration and enrichment time of the sample is greatly improved under the condition that the extraction rate is not greatly changed, and the detection limit and the determination limit of sample determination are greatly reduced; and the purpose that a same instrument can be used for measuring trace substances is achieved, the measuring range of the instrument is greatly enlarged, and therefore work of high-grade instruments is completed through low-grade cheap instruments, and trace substances measured through thehigh-grade instruments are measured through low-grade cheap instruments.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis, and relates to a high-efficiency concentrated liquid-liquid microextraction device and method that can be seamlessly combined with chromatographic analysis. Background technique [0002] Liquid-liquid extraction, also known as solvent extraction or extraction, refers to the separation and extraction of components in a liquid mixture with a solvent; liquid-liquid extraction is one of the most commonly used methods in the pretreatment of analytical and testing samples. The specific process of liquid-liquid extraction is to add an immiscible selected solvent to the liquid mixture, and use the different solubility of its components in the solvent to achieve the purpose of separation or extraction. [0003] In gas chromatographic analysis, generally samples should be processed into organic solvents, not in aqueous solutions; therefore, when testing liquid samples by gas chromatographic analy...

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Application Information

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IPC IPC(8): B01D11/04
CPCB01D11/0496
Inventor 郭治安高翔赵景婵
Owner 郭治安
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