CDS EmporeTM (formerly 3MTM EmporeTM) EZ-Trace is an extraction system allowing for simultaneous extractions and significantly reducing preparation time of multiple samples. This application note demonstrates the performance of the EZ-Trace using the EmporeTM SDB-XC disk under EPA method 525.3 for reagent grade and ground water. The recovery is determined for 125 analytes for this method and demonstrates that the EmporeTM EZ-Trace system provides a clean and efficient extraction with the EmporeTM SDB-XC disk.
EPA Method 525.3 is a targeted list of 125 semi-volatile organic compounds in drinking water, 15 more than the previous version 525.2. Target compounds of interest in this method include organochlorine, -nitrogen and -phosphorous pesticides, polycyclic aromatic hydrocarbons (PAHs), and polychlorinated biphenyl (PCBs).1 In addition to an expanded list of target compounds, Method 525.3 also was developed to provide an update on methods in sample preservation and sample preparation by exploring new solid phase extraction (SPE) technologies. Method 525.2 and 525.3 saw the transition from C18 silica-based sorbents to newer polymeric based sorbents. The attractiveness of polymeric based sorbents is that they provide greater stability at lower pH, are readily wettable with water, and remove the complications of silanol interactions that are present with silica-based sorbents.2
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