DIN 38405-27:2017-10 German standard methods for the examination of water, waste water and sludge - Anions (group D) - Part 27: Determination of sulfide by gas extraction method (D 27)
2017DIN 38405-27:2017-10 German standard methods for the examination of water, waste water and sludge - Anions (group D) - Part 27: Determination of sulfide by gas extraction method (D 27)
1992DIN 38405-27:1992 German standard methods for the examination of water, waste water and sludge; anions (group D); determination of readily liberatet sulfide (D 27)