Topics in GC & HPLC

Method 524.3 was approved by the EPA and promulgated; meaning that it has been published in the Federal Register & can replace 524.2 Revision IV. Poor purging compounds were removed from the target list (i.e. 2-nitropropane, nitrobenzene, 1,1-dichloropropanone); Chlorodifluoromethane (Freon® 22) was added as an emerging contaminant; and Oxygenates were added. HCl preservation was removed and P&T modifications are allowed; including heated purge. Single Ion Monitoring (SIM) has also been added. The method was developed using an Rtx-VMS 30m x 0.25mm x 1.4df Cat#19915 with Tekmar equipment, however, the method allows other columns & instrumentation to be used. OI Analytical has demonstrated that the Eclipse 4660 P&T using an Rtx-624 30m x 0.25mm x 1.4df cat#10968 is also appropriate for the method (OI Publication 32620409). If you have any questions or need help with your drinking water method send me an e-mail.

method http://www.epa.gov/safewater/methods/pdfs/methods/met524-3.pdf