Appendix D: Analytical Methods 



+ = Stable against treatment 

 - = Not stable against treatment 



Retention time determinarions with modern GC equipment, including electronic integrators 

 with fast response times (250 msec) can be carried out with a precision of 6-18 msec. 

 Identification of a considerable number of compounds can be carried out by comparison of 

 retention times in chromatograms of the sample and one or more mixtures of the compounds of 

 interest. Some peaks eluting in the HPLC fracrion may originate from CB congeners which are not 

 present in the standards supplied. Comparisons with chromatograms of one of the Arochlor 

 mixtures run under identical chromatographic conditions assists in their identification. 



101 



