43 
Oil Spill identification - Round Robin 20045 
Fi S 17 boiling between C13 and C16, are determined and compared. 
RIZA weathering check 
Consequently, firstly a “big alert” is produced in the diagrams showing that 
the corresponding error bars highly exceed the critical difference, and 
afterwards an “all clear” is produced by showing in a second diagram that 
those big differences are caused by evaporation: 
The comparison of ratios 
■ Source I - Extract II 
normalized difference% 
14 28 
DR-SES 1/SES2 
DR-SES 3/SES5 
DR-SES4/SES& 
DR-SES 5/SES10 
DR-BaF/4-Mpy 
OR-Bb*cF/4-Mpy 
DR-2-Mpy/4-Mpy 
■ 
DR -1-M py /4-M py 
ra *'° DR -Rt ten« /C4- phe 
I 
DR-2-MP/1-MP 
DR-C2- dbt /C2-phc 
DR-C3-dbt/C3-pho 
DR-4MDM-MD 
DR -C3-dbt/C3 -ehr 
DR-C23 tri/3 Oab 
DR-C24tri/C23tri 
D R-C 25tr i / C2 3 tri 
OR-C28*C 23 tri/3 Oab 
DR-C28 tri/3 Cab 
DR-C23tri/30ab 
DR-27T j/2 7Tm 
DR-28a b/30ab 
D R-25nor30ab/3 Oab 
D R-2 9ab *23T s/3 Oab 
1 
DR-30 d/3 Cab 
DR-23b a/3 Cab 
r*r, 
Fig 18. 
RIZA comparison of ratios