Abbreviations 
37 
PAH 
polycyclic aromatic hydrocarbon (also: polyaromatic hydrocarbon) 
PDB 
Pee Dee Belemnite 
per mil 
parts per thousand (also: permille) 
Pi 
normalised intensities of n-alkanes 
PUI 
Peaceful Uses Initiatives program 
R&D 
research and development 
Retention 
Time for a chemical compound to pass through a chromatographic system 
RR 
Round Robin (also: intercalibration study) 
RSD 
relative standard deviation 
RWS 
Rijkswaterstaat 
s, also: stdev 
standard deviation 
UCM 
unresolved complex mixture 
UEG 
Independent Group of Environmental Experts „Consequences of Pollution Accidents“ at the 
Central Command for Maritime Emergencies (German: Unabhängige Umweltexpertengruppe 
„Folgen von Schadstoffunfällen“ beim Havariekommando) 
VPDB 
“Vienna Pee Dee Belemnite”, an analytical standard for 5 13 C-Analysis 
Xi 
Random variable. Here: chain length of n-alkane 
5 
Mathematical symbol or a difference of tow values 
5 13 C 
13 C content expressed as difference to a standard