A device and method for simply preparing VOC gas

Abstract

A device and method for simply preparing VOC gas are disclosed. The device includes a hollow cavity provided with a gas feeding conduit communicated with the cavity, with the gas feeding conduit beingused for feeding nitrogen into the cavity; a gas discharging conduit used for discharging air and excessive nitrogen in the cavity; and a sample conduit used for adding liquid VOC into the cavity andsucking the prepared VOC gas. The gas feeding conduit and the gas discharging conduit are provided with open-close gears. The sample conduit is provided with a rubber stopper. Operation can be performed directly on a glass container. The mole number of the nitrogen is calculated according to one atmospheric pressure, and therefore a high-pressure nitrogen preparing apparatus and an electronic balance are not needed, and the device is simple and easy to operate. The device is convenient to use and can prepare the VOC gas having a required concentration at any time. The device and the method are rapid, the VOC gas is immediately used after the VOC gas is prepared, a mixing gear for uniform mixing is not needed, and hand shaking is utilized to directly mix a material.

Description

technical field [0001] The invention relates to the field of VOC gas preparation, in particular to a simple device and method for preparing VOC gas. Background technique [0002] VOC is the English abbreviation of volatile organic compounds (volatile organic compounds), which has a huge impact on human health. When the VOC gas in the room reaches a certain concentration, people will feel headache, nausea, vomiting, fatigue, etc. in a short period of time. Serious consequences such as memory loss. [0003] In order to conduct research on VOC gas detection and treatment, environmental testing departments and scientific research institutes need a large amount of standard VOC gas. The VOC gas prepared in the laboratory is usually mixed with organic compounds (such as benzene, toluene, xylene, dimethyl disulfide, ethanethiol, methyl chloride, methyl sulfide and other volatile organic compounds) in nitrogen. gas. [0004] At present, the preparation of VOC gas is basically car...

AI Technical Summary

Problems solved by technology

The traditional weighing method not only takes a long time, but the steps are cumbersome and take up a lot of equipment

In addition, it takes about a week to order a bottle of gas, and the cost is about several thousand

For users who are in urgent need of use, there are disadvantages of long cycle and high cost

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