Application of gas chromatography in the detection of VOC content in paint

With the development of technology to improve people's living standards and enhance the rapid development of the coatings industry and environmental awareness , in addition to the requirements of the decorative material attractive and durable , but also required to comply with the requirements of environmental protection and health benefits .

Gas chromatography is a technique may be qualitative , quantitative separation and analysis techniques. Because of its high separation efficiency , rapid analysis , good selectivity。 Gas chromatography is widely used in the field of contaminant analysis in environmental samples , quality control and other industrial products .

Under the new provisions of the national standard GB18582-2008 , and must be measured for paint products such as water and water-based wall paint wall putty using gas chromatography , detection of which the sum of the content of volatile organic compounds VOC and benzene , toluene , xylene .

GC is a large precision instruments in the paint analysis, one of the most widely used instrument .

Principle

After the sample is diluted by gas chromatography analysis for all the samples in the separation of volatile organic compounds , the qualitative identification of the test compound , using the internal standard method to test its content.

Equipment

Gas chromatograph includes the following configuration

1 shunt device inlet, and vaporization chamber liner can be replaced

2 temperature-programmed controller

3 detector , a flame ionization detector

4 column polydimethylsiloxane capillary column

5 injector, a microsyringe , 10 l

6 vials with about 20 ml glass bottle with a tight lid .

7 balance, accuracy of 0.1 mg

Because of its unique properties in coatings, Gas chromatographic analysis methods has been quite popular , as early as 1997 have used this method to detect the Nippon Paint , Watson 's numerous chemical plants and other products, residual monomers , free monomer , solvents and VOC analysis and other aspects of the application has been successful for the coatings industry development and environmental protection technology provides a good guarantee . standardization in the field of paint analysis , gas chromatography analysis by showing , automation and specialization trend has been formed to develop and commercialize applications that meet specific criteria and application -specific software analysis system has become in recent years, major technology progress flag.