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A device and method for extracting volatile and semi-volatile components in a sample

A semi-volatile, extraction device technology, applied in the field of extraction devices for volatile and semi-volatile components, can solve the problems of long sample preparation time, loss of volatile and semi-volatile components, etc., to simplify the sample preparation process and reduce organic solvents. The amount of use, the effect of easy installation

Active Publication Date: 2019-06-21
CHINA TOBACCO HENAN IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to increase the concentration of the extracted target analysis (especially when the content of volatile and semi-volatile components in the complex matrix is ​​low), this method needs to further concentrate the organic phase when the extraction is completed, and the concentration process It will also cause the loss of volatile and semi-volatile components. At the same time, this method still requires a long sample preparation time (usually greater than 2 h), so the application of this method still has certain limitations.

Method used

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  • A device and method for extracting volatile and semi-volatile components in a sample
  • A device and method for extracting volatile and semi-volatile components in a sample
  • A device and method for extracting volatile and semi-volatile components in a sample

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Experimental program
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Embodiment 1

[0037] Such as Figure 1~6 As shown, the volatile and semi-volatile component extraction device in the sample provided by the present invention includes a distillation component and a condensate collection extraction component respectively connected to the condensation component;

[0038] The distillation part is a sample retort 1, and the sample retort 1 is provided with a feeding port 11 and a water vapor inlet pipe 2, and the sample retort 1 passes through the connection port of the condensation part ( figure 2 The dotted line at the middle and upper end) is connected to the condensing part; the volume of the sample retort 1 can be, for example, 250 mL;

[0039] The condensing part has a lowercase "μ" structure, specifically including a distillation head 3 connected to the distillation part, a condensation tube sleeve 9 connected to the distillation head 3 and a condensate exporting fork pipe 12.

[0040] Wherein the distillation head 3 is preferably provided with a therm...

Embodiment 2

[0046] Using the device for extracting volatile and semi-volatile components in the sample provided in Example 1, the inventors took the extraction of volatile and semi-volatile components in jujube as an example to conduct an actual extraction experiment. The relevant experimental operation process is introduced as follows.

[0047] Sample treatment: Weigh 20 g of crushed jujube, dissolve in 20 mL of distilled water and add internal standard phenylethyl acetate, mix well and set aside, then operate in the following order:

[0048] (1) Close the liquid separation piston 16, and add 2 mL of organic extraction solvent diethyl ether into the extraction liquid separation bottle 15;

[0049] (2) After the connection of the device is completed, connect the condensate water system and continuously feed the condensate water so that the condensate pipe 8 is filled with condensate water;

[0050] (3) Add the above-mentioned processed sample into the sample retort 1 through the feed port...

Embodiment 3

[0055] Present embodiment is the same as embodiment 2, adopts the volatile semi-volatile component extracting device in the sample provided in embodiment 1 equally, the volatile semi-volatile component in jackfruit pulp is extracted and analyzed, the result is as follows Figure 8 . During extraction, the organic extraction solvent in the extraction separatory bottle 15 is a mixed solution of 3 mL of methyl tert-butyl ether and cyclohexane (1:2, v / v); time) is 30 min.

[0056] During extraction, the pretreatment method of the jackfruit pulp sample was as follows: take 20 g of jackfruit pulp, homogenize it, and then add 20 mL of distilled water.

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Abstract

The invention belongs to the technical field of experimental equipment, and particularly relates to an extracting device suitable for extracting volatile and semivolatile components in a sample and an extracting method using the device. The device comprises a condensing part, a distilling part connected with the condensing part and a condensate collecting and extracting part connected with the condensing part; the condensing part is integrally of a u-shaped structure and comprises a distilling head connected with the distilling part, a condenser pipe casing pipe connected with the distilling head and a condensate guiding breeches pipe; the condensate collecting and extracting part comprises a vacuum liquid receiving ox horn pipe and an extracting liquid separating flask which are sequentially connected with the condensate guiding breeches pipe, wherein the vacuum liquid receiving ox horn pipe is provided with a branch pipe communicated with atmosphere. According to the extracting device and the extracting method, the sample preparing process can be simplified, the usage amount of organic solvent is reduced, and sample loss is avoided; the device is easy to operate and convenient to clean and has the better practical value in the fields of sample analyzing and sample testing.

Description

technical field [0001] The invention belongs to the technical field of experimental equipment, and in particular relates to an extraction device suitable for extracting volatile and semi-volatile components in a sample and an extraction method using the device. Background technique [0002] In the analysis of volatile and semi-volatile components in complex matrices, especially the analysis of trace aroma components in food or flavor materials, some sample preparation methods are usually used to pre-treat the samples to achieve the analysis of volatile and semi-volatile components. Purposes of extraction, separation and enrichment. Liquid-liquid extraction with various auxiliary means, steam distillation, and simultaneous distillation extraction are commonly used sample pretreatment methods. [0003] When liquid-liquid extraction is used to extract volatile and semi-volatile components, more organic solvents are usually required, and concentration after extraction is usuall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 蔡莉莉陈芝飞孙世豪郝辉芦昶彤孙志涛宋金勇田海英张启东柴国壁
Owner CHINA TOBACCO HENAN IND