title: [Sources of error and optimization of the methylene blue procedure. CdS suspensions as reference samples for the ring test].
mesh_terms: D000397:Air Pollution / Q000032:analysis*; D002104:Cadmium; D019187:Cadmium Compounds; D005859:Germany, East; D006801:Humans; D006862:Hydrogen Sulfide / Q000032:analysis*; D008751:Methylene Blue; D012015:Reference Standards; D013440:Sulfides
chemical_list: D019187:Cadmium Compounds; D013440:Sulfides; D002104:Cadmium; C034939:cadmium sulfide; D008751:Methylene Blue; D006862:Hydrogen Sulfide
vernacular_title: Fehlerquellen und Optimierung des Methylenblau-Verfahrens. CdS-Suspensionen als Referenzproben für Ringtests.