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BSH Report No. 56 
Set 1 consisted of samples which came from different countries but were found 
within a relatively short time span. 
Set 2 consisted of samples which were again retrieved from very distant ori 
gins. However, in terms of the bell shapes (GC-FID), they were quite dissimilar 
to the first set and were separated temporarily by three years (samples were 
found 2010 and 2014). 
Set 3 had the function of a control group. These samples were found at the 
North Sea coast within close spatial and temporal proximity (07/08-2013). The 
data suggested that these samples stem from the exact same paraffin-wax 
bulk. 
Set 4 was a duplicate (from the same stock solution) of the very first sample 
from Set 1 (from France). 
Solutions of the dissolved paraffin samples were shipped to the participants. 
Participants were asked to analyse the samples in duplicate and in exactly the 
order given above with their available Instrumentation. This way we have a 
duplicate analysis of the same sample at the beginning and at the end of a 
sequence to monitor analytical performance.