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 chlorine in the stationary source emissions. This standard specifies the iodometric method used to determine chlorine in the stationary source emissions.

 Stationary source emission–Determination of chlorine–Iodometric method (HJ 547-2017, replacing HJ 547-2009)