[Determination of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in 2,4,5-trichlorophenoxyacetic acid, 2,4,5-trichlorophenoxyacetic acid-alkylesters and in the corresponding herbicide formulations (author's transl)].
A method is described for the determination of 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) in 2,4,5-Trichlorophenoxyacetic Acid (2,4,5-T), 2,4,5-T-Akylesters and commercial herbicide formulations containing these substances. TCDD is extracted from alkaline solution with n-hexane and purified by column chromatography on silica gel and Florisil. TCDD is determined by gas-liquid chromatography with EC-detection. For TCDD-additions of 20 micron/kg to herbicide formulations recoveries of dioxin are 96--104%. The detection limit is about 5 microgram/kg 2,4,5-T.
D015085:2,4,5-Trichlorophenoxyacetic Acid / Q000032:analysis*; D002849:Chromatography, Gas; D004147:Dioxins / Q000032:analysis*; D004952:Esters; D006540:Herbicides / Q000032:analysis; D000072317:Polychlorinated Dibenzodioxins / Q000032:analysis*; D013329:Structure-Activity Relationship
D004147:Dioxins; D004952:Esters; D006540:Herbicides; D000072317:Polychlorinated Dibenzodioxins; D015085:2,4,5-Trichlorophenoxyacetic Acid
Bestimmung von 2,3,7,8-Tetrachlordibenzo-p-dioxin (TCDD) in 2,4,5-Trichlorphenoxyessigsäure, 2,4,5-Trichlorphenoxyessigsäurealkylestern und daraus hergestellten Herbicid-Präparaten.