Bestimmung von 2,3,7,8-Tetrachlordibenzo-p-dioxin (TCDD) in 2,4,5-Trichlorphenoxyessigsäure, 2,4,5-Trichlorphenoxyessigsäurealkylestern und daraus hergestellten Herbicid-Präparaten
- 1 January 1979
- journal article
- research article
- Published by Springer Nature in Zeitschrift für Lebensmittel-Untersuchung und Forschung
- Vol. 168 (1), 21-24
- https://doi.org/10.1007/bf01267755
Abstract
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 a kaline 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 μ/kg to herbicide formulations recoveries of dioxin are 96–104%. The detection limit is about 5 μg/kg 2,4,5-T. Es wird eine Analysenmethode zur Bestimmung von 2,3,7,8-Tetrachlordibenzo-p-dioxin (TCDD) in 2,4,5-Trichlorphenoxyessigsäure (2,4,5-T), 2,4,5-T-Alkylestern und daraus hergestellten Herbicid-Präparaten beschrieben. TCDD wird aus alkalischer Lösung mit n-Hexan extrahiert und durch Sdulenchromatographie an Kieselgel und Florisil gereinigt. Die Bestimmung erfolgt gaschromatographisch mit Hilfe des ECD. Die Nachweisgrenze der Analysenmethode liegt bei 5 μg/kg bezogen auf 2,4,5-T. Die Wiederfmdungsraten betragen 96–104% bei TCDD-Zusätzen von 20 μg/kg zu Herbicid-Formulierungen.Keywords
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