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Solvent desorption device and method

A desorption and solvent technology, applied in the field of desorption devices, can solve the problems of non-reusable, low desorption efficiency, long-term two-phase equilibrium, etc., and achieve the effects of ensuring quality control, high desorption efficiency, and improving concentration effect.

Active Publication Date: 2014-04-30
云南聚光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the methods adopt the static method, and it takes a long time to reach the two-phase equilibrium.
[0011] (2) Low desorption efficiency:
[0014] The traditional solvent desorption method needs to destroy the adsorption tube and soak it with desorption solution, so the adsorption tube is disposable and cannot be reused

Method used

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  • Solvent desorption device and method
  • Solvent desorption device and method
  • Solvent desorption device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A solvent desorption device, comprising an adsorption tube, an adsorption tube connector, a pump and a desorption flow path;

[0058] The sample to be tested is adsorbed in the adsorption tube; the adsorption tube can be a traditional adsorption tube, or an adsorption medium such as a filter membrane that collects the sample to be tested is packed into a container to form;

[0059] The adsorption tube communicates with the desorption flow path through an adsorption tube joint.

[0060] The pump is in the desorption flow path. When the adsorption tube is connected to the desorption flow path and the desorption liquid is also added to the desorption flow path, the pump drives the desorption liquid so that the desorption liquid passes through the adsorption tube and circulates in the desorption flow path. to desorb the sample in the adsorption tube to an equilibrium state.

[0061] Further, the solvent desorption device also includes a flow control module to control the p...

Embodiment 2

[0093] This embodiment is an application example of embodiment 1 when desorbing the adsorption tube that collects the air in the workplace.

[0094] The sampling process of the adsorption tube with the sample to be tested provided in this application example is as follows: According to the occupational health standard of the Ministry of Health - "Determination of Toxic Substances in the Workplace Air Aromatic Hydrocarbon Compounds" (GBZ / T160.42-2007) It is stipulated that in the production workshop of the pesticide atrazine, the air in the workplace is collected for 8 hours through a 10 mg, approximately 2 cm long activated carbon adsorption tube at a sampling flow rate of 50 mL / min. The suction tube is installed on the upper part of the laborer's chest to collect the air in his breathing zone.

[0095] The desorption liquid used in this application example is carbon disulfide.

[0096] see figure 1 , the solvent desorption device provided in this application example include...

Embodiment 3

[0108] see figure 2 , the solvent desorption device provided in this embodiment is different from the solvent desorption device described in Example 2 in that:

[0109] The solvent desorption device also includes a liquid storage bottle 52 in the desorption flow path, and the liquid storage bottle 52 is located between the solenoid valve 211 and the solenoid valve 221;

[0110] The pump 21 pumps the sample in the desorption flow path into the liquid storage bottle 52 for storage, and then takes a sample from the liquid storage bottle.

[0111] Preferably, a scale is engraved on the outer wall of the liquid storage bottle, so as to facilitate reading the liquid volume in the liquid storage bottle.

[0112] This embodiment also provides a solvent desorption method, which is different from the solvent desorption method described in Example 2:

[0113] In step B, the solenoid valve 211, solenoid valve 212, and solenoid valve 221 are opened, and the pump 21 pumps 1 mL of carbon ...

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Abstract

The invention relates to a solvent desorption device. The solvent desorption device comprises an adsorption pipe. The solvent desorption device is characterized by also comprising an adsorption pipe connector and a pump, wherein the adsorption pipe connector is used for connecting the adsorption pipe, which adsorbs to-be-detected samples, into a desorption flow channel; the pump enables a desorption liquid to circulate in the desorption flow channel so as to desorb the samples in the adsorption pipe and make the samples in a balanced state. The invention also provides a solvent desorption method. The solvent desorption device and method have the advantages of time saving effect, high desorption efficiency and high desorption repetition rate.

Description

technical field [0001] The invention relates to a desorption device and method, in particular to a solvent desorption device and method. Background technique [0002] At present, a complete sample analysis process can be divided into the following four links: sample collection, sample pretreatment, sample separation and analysis, and data processing. [0003] For sample collection and pretreatment, there are many traditional methods, such as: fixed container sampling + pre-concentration analysis, solid adsorbent sampling + thermal desorption, solid adsorbent sampling + solvent desorption, solvent absorption sampling, etc., each method has respective scope of application. [0004] For the sample collection and pretreatment of thermally unstable volatile organic compounds (such as mercaptans and olefins), there are currently two optimal methods: solid adsorbent sampling + solvent desorption and fixed container sampling + pre-concentration analysis. [0005] For fixed contain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/40G01N1/44
Inventor 邓嘉辉马乔朱蓉段炼刘盈智吴先伟刘立鹏郑毅韩双来尚艳丽
Owner 云南聚光科技有限公司
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