| Title: | Phase ratio variation approach for the study of partitioning behavior of volatile organic compounds in polymer sample bags: Nalophan case study |
| Author(s): | Van Durme J; Werbrouck B; |
| Address: | "Research Group Molecular Odor Chemistry, KU Leuven Technology Campus Ghent, Gebroeders De Smetstraat 1, 9000, Ghent, Belgium, jim.vandurme@kuleuven.be" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-015-4320-2 |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Linking) |
| Abstract: | "Sorption of volatile organic compounds on the inner surface of polymer sampling bags leads to important underestimations of the real headspace concentration. Introducing a wide range of volatiles in a two-phase system containing Nalophan revealed that recoveries decreased down to 57 % in a period of 22 h. In this work, a phase ratio variation approach is investigated to quantify the degree of scalping, and thus enabling to compensate for sorption phenomena. This method requires limited measurements, without the need for time-consuming calibrations. By spiking identical amounts of volatiles in three two-phase systems, each having unique polymer volume/mass ratios beta (beta 1 = 0, beta 2 = 80.9, beta 3 = 161.9), individual partitioning coefficients could be experimentally determined for a wide range of compounds. Additionally, a correlation was found between these partitioning coefficients and the liquid molar volume for a number of aliphatic, aromatic, and oxygenated compounds" |
| Keywords: | Adsorption Environmental Monitoring/*methods Polyethylene Terephthalates/*chemistry Specimen Handling Surface Properties Volatile Organic Compounds/*analysis/chemistry; |
| Notes: | "MedlineVan Durme, Jim Werbrouck, Bas eng Germany 2015/03/22 Environ Sci Pollut Res Int. 2015 Jul; 22(14):11067-75. doi: 10.1007/s11356-015-4320-2. Epub 2015 Mar 21" |
