3 
Table of contents 
Table of contents 
Scope of this study: the research and development project 4 
Background 5 
Status of GC-FID-generated data and handling 7 
Limitations of GC-MS analysis for paraffin wax 10 
Isotope Ratio Mass Spectrometry (IRMS) 11 
The scope and concept of this mini Round Robin (miniRR) 13 
Participating laboratories 15 
Method of data evaluation 16 
Performance and results 18 
GC-FIDdata 18 
MS data on biomarkers 20 
IRMS data 24 
Advanced Statistics 27 
Discussion Points 31 
Summary and Conclusion 32 
Outlook 34 
Acknowledgement 35 
Abbreviations 36 
A look at the hardware 38 
GC-FID-Conditions 38 
IRMS-Conditions 39 
References 40