(HJ 904-2017, entry into force on 2018-03-01)
This standard is formulated for the purposes of enforcing the Environment Protection Law of the People’s Republic of China and Air Pollution Prevention and Control Law of the People’s Republic of China, protecting the environment, safeguarding the human health, and setting standards for the determination of polychlorinated biphenyl mixtures in the ambient air. This standard specifies the gas chromatography used to determine polychlorinated biphenyl mixtures in the ambient air. The Appendix A to this standard is normative, and the appendixes B~D are referential. This standard is the original version.