The chromatographic conditions listed in the total aromatic method are loosely defined. Does this mean that the laboratory is free to use any type of column and chromatographic conditions as long as adequate separation and the appropriate QA/QC parameters are met?

Yes. (7/1/94)

This question and answer was posted at Consolidated List of Reformulated Gasoline and Anti-Dumping Questions and Answers: July 1, 1994 through November 10, 1997 (pdf) (18.2 MB, July 2003, EPA420-R-03-009).