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On-line aerosol sample pretreatment device and detection method combined with ion chromatography

A sample pretreatment and ion chromatography technology, applied in the field of online aerosol sample pretreatment devices, can solve the problems of long sampling time, low solution utilization rate, cumbersome pretreatment process, etc., and achieve the effect of high sensitivity

Inactive Publication Date: 2017-03-29
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This conventional method takes a long time to sample, the pretreatment process is cumbersome, it is easy to introduce impurities, and the utilization rate of the solution after treatment is low.

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  • On-line aerosol sample pretreatment device and detection method combined with ion chromatography
  • On-line aerosol sample pretreatment device and detection method combined with ion chromatography

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing of description, by specific embodiment, the technical solution of the present invention is further described as follows:

[0021] figure 1 It is a schematic diagram of the instrument connection structure of the online aerosol sample pretreatment device. The device is mainly composed of a high-efficiency liquid phase pump, a six-way valve 3, a ten-way valve 8, a collection ring 9, a capture column 2, and a pretreatment analysis device 7. The high-efficiency liquid phase pump There are two sets in total. The first high-efficiency liquid phase pump 1 and the trapping column 2 are connected to the six-way valve 3. The pre-treatment analysis device 7 includes a three-way interface 5 and a filter membrane clamp 4. The upper and lower ends of the pre-treatment analysis device 7 are respectively connected. On the six-way valve 3, the three-way exhaust pipe 6 on the three-way interface 5 is connected to the ten-way valve 8, and the ...

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Abstract

The invention discloses an ion-chromatography-combined online pretreatment device for an aerosol sample and a detection method. The device mainly comprises two efficient liquid-phase pumps, a six-way valve, a ten-way valve, a collecting ring, a capturing column and a pretreatment resolving device, wherein the first efficient liquid-phase pump and the capturing column are connected with the six-way valve; the pretreatment resolving device comprises a three-way connector and a filter membrane clamp; the second efficient liquid-phase pump is connected with the ten-way valve; an ion-chromatography separation and detection device comprises an anionic guard column, an anion exchange column, an inhibitor and an electrical conductivity detector; the ion-chromatography separation and detection device is connected with the ten-way valve. According to the device, the traditional filter membrane offline treatment steps are replaced by online steps; the sampled aerosol sample can be introduced without being treated; meanwhile, the large-volume introduction method is performed, and a small filter element and a portable atmospheric sampling pump can be operated for sampling, meanwhile the sampling time can be shortened, and the loss on volatile components can be decreased.

Description

technical field [0001] The invention belongs to the field of instrument analysis, in particular to an on-line aerosol sample pretreatment device combined with ion chromatography. Background technique [0002] At present, the detection of soluble ions in aerosol mainly uses a microporous membrane with a large cross-sectional area, and a gas sampling pump with a medium flow rate or a large flow rate is used for sampling. The sampled microporous filter membrane is placed in deionized water for ultrasonic dissolution of soluble ions, and then the analytical solution is filtered through the porous filter membrane to remove particles, and a small volume (such as 25 μL) is taken into the ion chromatography system for analysis. This conventional method takes a long time to sample, the pretreatment process is cumbersome, and impurities are easily introduced, and the utilization rate of the solution after treatment is low. [0003] Ion chromatography is a conventional method for dete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88
Inventor 张恺朱岩
Owner ZHEJIANG UNIV