KS I ISO 4221-2021
Air quality－Determination of mass concentration of sulphur dioxide in ambient air(Thorin spectrophotometric method)

Standard No.

KS I ISO 4221-2021

Release Date

2021

Published By

Korean Agency for Technology and Standards (KATS)

Latest

KS I ISO 4221-2021

KS I ISO 4221-2021 history

• 2021 KS I ISO 4221-2021 Air quality－Determination of mass concentration of sulphur dioxide in ambient air(Thorin spectrophotometric method)
• 0000 KS I ISO 4221-2006(2016)
• 2006 KS I ISO 4221:2006 Air quality－Determination of mass concentration of sulphur dioxide in ambient air(Thorin spectrophotometric method)
• 0000 KS I ISO 4221:2001