... reagent I, the add 0.5mL reagent II, wait for 5 minutes.3. Looking from up ... a result.Note: SO32-, S2O32-, NO3-, SCN-, I-, Pd2+, Hg2+, Cu2+ will affect the result.4 ... bacteria under anaerobic condition. Industrial wastewater coming from industrial and mining enterprises, such as coking, ... sulfides.Significance of sulfide testHydrogen sulfide can easily dissipate from the water into the air, producing ...