23 
Oil Spill identification - Round Robin 20045 
terpane ratios, which are separated in two graphs based on stability 
and weathering behavior according to Venosa et al. 
=> There is no match between Source II and Extract I or Extract II. 
There is a match between Source I and Extract I. 
There is a match between Source I and Extract II. 
2.8 Petrobas 
Contacts: Maria de Fatima Guadalupe Meniconi 
The founding of Petrobras www2.petrobras.com.br/ingles/index.asp 
was authorized in October 1953, by Law 2004, with the objective of 
executing, on behalf of the Federal Government, the activities of the oil 
sector in Brazil. Over more than four decades the company has become 
the Country's leader in the distribution of oil products, an activity not 
covered by the Government monopoly, and is internationally 
acknowledged as one of the fifteenth largest oil companies in the world 
today. 
The Environmental Assessment & Monitoring Department and the 
Geochemistry Division from PETROBRAS Research and Development 
Center (CENPES), carry out environmental analyses from all around 
Brazil, giving support to the Company in forensic litigations issues. 
These Divisions analysed the samples from RIZA Round Robin Oil Spill 
Identification. 
The Round Robin 2005 samples have been fractioned into aliphatic and 
aromatic fractions. The aliphatic fraction was analyzed to determine 
fingerprint (GC-FID) and saturated biomarkers (sesquiterpanes, 
terpanes and steranes) (GC-MS), and the aromatic fraction was 
analysed by GC-MS to determine polycyclic aromatic hydrocarbons 
(PAH) and aromatic biomarkers. 
=> According to the results of GC fingerprints, PAH distribution and 
aliphatic biomarkes, no significant differences could be observed among the 
samples Extract I, Extract II, Source I and Source II for this round robin. 
Thus, Extract I and Extract II match with both Sources I and II. 
2.9 Rijksinstituut voor Integraal Zoetwaterbeheer en 
Afvalwaterbehandeling (RIZA) 
Contact: P. Kienhuis 
The acronym RIZA stands for Institute for Inland Water Management 
and Waste Water Treatment. RIZA www.riza.nl is the research and 
advisory body for the Rijkswaterstaat (the Directorate-General for 
Public Works and Water Management) for inland water in the 
Netherlands and a leading international centre of knowledge for 
integrated water management.