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With the development of human production, the prosperity of life, especially the development of modern industry, agriculture and energy, the harm caused by the pollutants emitted by fixed sources in the atmosphere has become increasingly obvious. Among them, the fixed pollution sources include pots, kiln in factories, enterprises,Agilent crimp vials food and beverage service units, and exhaust pipes used by residents for life.
Among them, chlorobenzene waste gas is a derivative gas of a fixed pollution source, which is extremely harmful to the atmosphere. Chlorobenzene is a colorless liquid. It is widely used in the inspection of electronic industrial products and raw materials. It can also be used as a solvent for washing, cellulose acetate, synthetic resins, oils and lipids. It can also be used as an intermediate in the production of anilines, insecticides, phenols and chloronitrobenzenes, as well as in the manufacture of paints, rubber auxiliaries and fast-drying inks, as well as in the manufacture of dyes, organic synthesis and many pesticides.
In the industry, chlorobenzene is often used as a raw material in the fields of aniline, phenol, picric acid, dyes, medicines, perfumes, insecticides and the like. At the same time, due to the strong volatilization of chlorobenzene, chlorobenzene usually in water and soil will quickly evaporate into the air, so the substance is extremely polluted by the atmosphere.
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Recently, it was issued by the Ministry of the Environment, and the Environmental Monitoring Department of the Ministry of Environmental Protection and the Science and Technology Standards Department revised and revised the draft of the “Gas Chromatography Method for the Determination of Chlorobenzenes in Fixed Pollution Sources” drafted by the Environmental Monitoring Center of Zhejiang Province. In the process of continuous development of industrial manufacturing, the problem of atmospheric pollution is still very serious. Therefore, the gas chromatography method for the determination of chlorobenzenes in fixed-source exhaust gas needs to be continuously improved.
It is understood that this time, in order to implement the "Environmental Protection Law" and the "Air Pollution Prevention and Control Law", while protecting the environment, safeguarding human health, and further standardizing the determination method of chlorinated benzene compounds in the air of stationary pollution source and unorganized emission monitoring points, This standard has been developed.Agilent crimp vials
This standard is a revision of "Gas Chromatography for the Determination of Chlorobenzenes in Fixed Sources of Waste Gases" (HJ/T39-1999) and "Gas Chromatography for the Determination of Chlorobenzenes in Atmospheric Fixed Pollution Sources" (HJ/T66-2001). It stipulates chlorobenzene, 2-chlorotoluene, 3-chlorotoluene, 4-chlorotoluene, 1,2-dichlorobenzene, 1,3 dichlorobenzene, 1,4 two in the air of solid pollution source and unorganized emission monitoring points. A gas chromatographic method for the determination of 13 chlorobenzene compounds such as chlorobenzene.
This standard was prepared and revised according to HJ/T39-1999 and HJ/T66-2001. The main changes are as follows: modify the standard name; expand the measurement index, increase the number of chlorobenzene compounds from 3 to 13; Detection limit, method principle, reagents and materials; increased adsorption method of activated carbon adsorption of chlorobenzene compounds; increased quality assurance and quality control requirements; increased sampling tube desorption efficiency determination method.
There are many reasons for affecting atmospheric pollution, and chlorobenzene waste gas is only one of the fixed sources of pollution. With the smog weather becoming more and more serious in recent years, the state has also increased the intensity of air pollution control. Agilent crimp vials With the implementation of the “energy saving and emission reduction” policy, it is believed that the air quality can be effectively improved under the supervision of the implementation of the policy and the supervision of scientific instruments.