Zusammenfassung
Ein von uns beschriebenes Verfahren [1] erlaubt die selektive Abtrennung von 2,3,7,8-TCDD von den übrigen PCDD und PCDF durch Fraktionierung an Alumina Woelm B Super I. Diese Methode wurde nun zur Bestimmung von 2,3,7,8-TCDD in verschiedenen Proben von Chlorphenolen und verwandten Produkten angewandt.
Analysenergebnisse für Pentachlorphenol, Pentachlorphenol-Natrium, 2,3,4,5-Tetrachlorphenol, 2,4-Dichlorphenoxyessigsäure, Hexachlorophen und Chloranil werden berichtet. Während in Pentachlorphenol und Chloranil 2,3,7,8-TCDD bei einer Nachweisgrenze von ca. 0,03 ng/g (ppb) nicht nachgewiesen werden konnte, wurde 2,3,7,8-TCDD in allen übrigen Proben nachgewiesen. Mit Ausnahme von 2,4-Dichlorphenoxyessigsäure lagen die Konzentrationen an 2,3,7,8-TCDD unter 1 ng/g (ppb).
Summary
We have recently published a procedure [1] which allows the selective determination of 2,3,7,8-TCDD in the presence of a large excess of other polychlorinated dibenzodioxins (PCDD) and polychlorinated dibenzofurans (PCDF). This method was applied for the determination of 2,3,7,8-TCDD in several samples of chlorophenols and related products.
Analytical results are reported for pentachlorophenol, sodium pentachlorophenate, 2,3,4,5-tetrachlorophenol, 2,4-dichlorophenoxyacetic acid, hexachlorophene, and chloranil. While 2,3,7,8-TCDD could not be detected at a limit of detection of about 0.03 ng/g (ppb) in pentachlorophenol and chloranil, 2,3,7,8-TCDD could be shown to be present in all samples of sodium pentachlorophenate and also in the samples of 2,3,4,5-tetrachlorophenol, 2,4-D, and hexachlorophene. With the exception of 2,4-D, the concentration of 2,3,7,8-TCDD in these samples was below 1 ng/g (pbb).
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This work was supported by the Ministerium für Ernährung, Landwirtschaft, Umwelt und Forsten, Baden-Württemberg. The skilful technical assistance of Roland Kerzenmacher and Heinz Tichaczek is acknowledged.
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Hagenmaier, H. Determination of 2,3,7,8-tetrachlorodibenzo-p-dioxin in commercial chlorophenols and related products. Z. Anal. Chem. 325, 603–606 (1986). https://doi.org/10.1007/BF00488307
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DOI: https://doi.org/10.1007/BF00488307