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A gas-liquid separation device

A gas-liquid separation device and gas-liquid separation technology, which are applied in the field of analytical chemistry, can solve the problems of low separation efficiency, limit the optimization of gas-liquid separators, affect the sensitivity and detection limit of gaseous sampling, and achieve separation efficiency. High and efficient effect

Inactive Publication Date: 2019-07-09
TIANJIN NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] (3) Separate the solution bubbling through the sintered glass core filter plate. This technology is to separate the carrier gas from the bottom of a sintered glass core filter plate to the solution on the sintered glass core filter plate. This method has good The gas-liquid separation efficiency, but so far, no literature or patent has revealed the effect of the pore size on the sintered glass on the separation efficiency
This limits the optimization of the gas-liquid separator
[0008] As mentioned above, the above-mentioned several gas-liquid separation methods and devices have the disadvantages that the separation efficiency is not high, except for sodium borohydride and arsenic, mercury, lead, selenium, germanium, tellurium, bismuth, antimony, tin and The volatiles generated by the cadmium reaction are easy to be separated, and the other on-line reactions—gas separation effects are not very ideal
Therefore, the sensitivity and detection limit of gaseous injection are affected

Method used

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Embodiment 1

[0027] A gas-liquid separation device, the inner diameter of the device is 3 centimeters. There are two air-permeable filter plates with micropores inside, and the pore size of the first air-permeable filter plate below is 10 microns, which is used to pass the carrier gas from below to make the solution bubbling for gas-liquid After separation, the separated volatiles are carried by the carrier gas through the upper second filter plate (with a pore size of 80 microns), and then enter the atomic spectrometer to be detected. The solution cannot pass through the upper filter plate, but is excluded on the side between the two filter plates. Wherein the vertical distance between the first filter plate and the second filter plate is 1.5 cm.

Embodiment 2

[0029] A gas-liquid separation device, the inner diameter of the device is 3.5 cm. There are two air-permeable filter plates made of sintered glass cores with micropores inside, the first air-permeable filter plate below has a pore size of 15 microns, which is used to pass the carrier gas from below to make the air-permeable filter plate above The solution is bubbled for gas-liquid separation, and the separated volatiles are carried by the carrier gas through the upper second filter plate (with 100 micron pores), and then enter the atomic spectrometer for detection. The solution cannot pass through the upper filter plate, but is excluded on the side between the two filter plates. Wherein the vertical distance between the first filter plate and the second filter plate is 1 cm.

Embodiment 3

[0031] Use a peristaltic pump to mix 0.4% sodium ethylenediamine dithiocarbamate (Na-DDTC) and a sample solution containing 2ppb zinc at an equal flow rate online, and the mixed solution enters a gas-liquid separator with the following parameters from tube 3 Device (see attached picture):

[0032] The inner diameter of the gas-liquid separator is 3.5 cm. There are two air-permeable filter plates made of sintered glass core with microporous inside, the pore diameter of the first air-permeable filter plate below is 5-15 microns, and the pore diameter of the second one above is 40-80 Micron. The vertical distance between the first filter plate and the second filter plate is 0.5 cm.

[0033] The volatile zinc-DDTC in the solution is immediately separated by the carrier gas (argon) bubbling from below, and the separated volatiles are carried by the carrier gas through the second fast gas-liquid separation filter plate above, and then carried The volatiles of gas and zinc are ent...

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Abstract

The invention discloses a gas-liquid separation device which is particularly applicable to the gaseous sample introduction of atomic spectrographs. The device comprises two gas-permeable filter plates with micropores, wherein the lower first gas-permeable filter plate is used for introducing carrier gas from the underside of the first gas-permeable filter plate, so as to enable the carrier gas to blister a solution above the first gas-permeable filter plate and carry out gas-liquid separation, and separated volatile matters are carried by the carrier gas, pass through the upper second filter plate with the micropores and then enter an atomic spectrograph for detection. The solution cannot infiltrate into the upper filter plate and is discharged from a side face between the two filter plates. The device disclosed by the invention can be used for efficiently separating dissolved gases in the solution, and is particularly applicable to a gaseous sample introduction technology in atomic spectra.

Description

technical field [0001] The invention belongs to the technical field of analytical chemistry, in particular to a device for separating dissolved gas in a solution. Background technique [0002] Gas-liquid separation is widely used in the fields of chemistry, biology and water treatment. Small gas-liquid separators are also widely used in analytical chemistry, especially in the gaseous sampling of atomic spectroscopy (ICP-AES, ICP-MS, AA, AFS). In this application field, the elements in the sample to be tested react with some reagents through online reactions to generate volatiles of the tested elements. The volatiles have a certain solubility in the solution, so the volatiles must be separated from separated from the solution for measurement. Through such on-line separation, not only the sensitivity of atomic spectroscopic analysis is improved and the detection limit is reduced, but also the element to be measured is well separated from the matrix in the solution, reducing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/34
CPCG01N1/34
Inventor 段旭川
Owner TIANJIN NORMAL UNIVERSITY
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