Appendix D: Analytical Methods 



138 



A12S4 



128 180 



170 



^W^-ju- 



FIG. D. 1 : GC-ECD of Aroclor 1254, obtained from IAEA/ILMR, Monaco. Note the 

 separation of peaks 149 and 118, indicating that the quality of the column is good. The 

 position of the congeners (identified by numbers according to Ballschmiter and Zell, 

 1980) is indicated at the apex of the peak. All congeners which are contained in the 

 PCB 1 (IOC-KIEL) standard solution are indicated, except for Nos.18 and 26 because 

 they do not appear in Aroclor 1254. For their positions, as well as those of other less 

 well resolved peaks, see e. g., Duinker and Hillebrand (1983) and UNEP (1988). 



113 



