Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1402, Issue -, Pages 94-101Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2015.05.019
Keywords
Silver-impregnated HPLC column; Argentation HPLC; On-line HPLC-GC-FID; Food contact materials; Polyolefin oligomers; Comprehensive two-dimensional GC (GC x GC)
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Multidimensional chromatography based on two-dimensional high performance liquid chromatography on-line coupled to gas chromatography (on-line HPLC-HPLC-GC) enables the separate analysis of saturated, monounsaturated and aromatic hydrocarbons in packaging materials like polyolefins or paper-board and their migrates into foods. Since normal-phase HPLC on silica gel did not preseparate saturated from monounsaturated hydrocarbons, a separation step on a normal-phase HPLC column treated in the laboratory with an optimized amount of silver nitrate was added. The preparation of this HPLC column and the instrumental set-up are described, followed by examples showing the potential of the method. In a preliminary investigation of 11 polyolefin granulates for food contact up to 40% monounsaturated hydrocarbons among the oligomers C16-35 were determined. (C) 2015 Elsevier B.V. All rights reserved.
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