Validation of a high-performance thin-layer chromatography/densitometry method for the quantitative determination of glucosamine in a herbal dietary supplement |
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| Authors: | Esters Virginie Angenot Luc Brandt Viviane Frédérich Michel Tits Monique Van Nerum Christophe Wauters Jean-Noël Hubert Philippe |
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| Affiliation: | Agroscope FAL Reckenholz, Swiss Federal Research Station for Agroecology and Agriculture (FAL), Reckenholzstrasse 191, CH-8046 Zürich, Switzerland. thomas.bucheli@fal.admin.ch |
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| Abstract: | Two-dimensional gas chromatography coupled to triple quadrupole mass spectrometry (GC-GC-MS-MS) is presented as a robust, selective and sensitive method for the accurate quantification of enantiomeric fractions (EFs) of atropisomeric polychlorinated biphenyls (PCBs) in a range of environmental matrices. The method was subjected to a set of quality control and validation experiments. EF precision of the atropisomers 95, 149, 132, and 174 ranged from 0.7 to 1.4% in soil samples. Quantified amounts of these congeners in soil and compost samples (59
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