“…The preparation of WAFs was performed according to (Erlenkaemper et al, 2008) without a filtration step to avoid physical handling that possibly causes a loss of substances or chemical changes (Singer et al, 2000). A defined amount of gasoline, fossil diesel fuel or RME was given in 1 L amber glass bottles (Duran Group GmbH, Wertheim/Main, Germany) and purified water (Milli-Q water; Millipore Corporation, Billerica, MA, USA) was added to obtain oil loadings of 50 g/L, 12.5 g/L, 3 g/L and 1 g/L for gasoline, 100 g/L and 0.1 g/L for diesel and 100 g/L for RME.…”