Optimization of alumina selectivity for tetrachlorodibenzo-p-dioxins and the isomer-specific determination of 2,3,7,8-tetrachlorodibenzo-p-dioxin

Autor:	Daniel R. Thielen, Gary. Olsen
Rok vydání:	1988
Předmět:	Chloroform Chloride Analytical Chemistry Solvent Hexane chemistry.chemical_compound Adsorption Column chromatography chemistry medicine Organic chemistry Methylene Selectivity medicine.drug
Zdroj:	Analytical Chemistry. 60:1332-1336
ISSN:	1520-6882 0003-2700
DOI:	10.1021/ac00164a018
Popis:	The selectivity of fully activated basic alumina for the separation of polychlorobiphenyls (PCBs) and tetrachlorinated dibenzo-p-dioxins (TCDDs) has been evaluated and shown to give complete separation of each class when a 12% chloroform/hexane eluting solvent is used. Further isolation of 2,3,7,8-TCDD from the other TCDD isomers can be made with either 15% methylene chloride, 40% chloroform, or 100% n-butyl chloride depending upon the interferences and selectivity required. The tenacious adsorption of the 2,3,7,8-TCDD isomer can be explained by a variety of factors including its planarity and linearity and the relative positions of the chlorines to each other and to the oxygen linkages of the TCDD molecule.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f3d67f49f71f9814d5e18cbab59b61f9 https://doi.org/10.1021/ac00164a018 Zobrazit plný text záznamu