Soil and Surface Water Analysis
Remedial investigations are supported at Eurofins Lancaster Laboratories Environmental through a number of different methods. We routinely run GC/MS Volatiles by SW-846 8260B using methanol (high-level) or sodium bisulfate (low-level) preservation using EnCore soil samplers. We have extensive experience in hydrocarbon analyses, testing for PAHs by SW-846 8270C and other statespecific methods such as MA VPH/EPH.
Selective Ion Monitoring (SIM) is employed to meet lower action levels for PAH compounds. By monitoring a single ion within a specific retention time window, we are able to detect a lower mass of the target analyte. The ability to use SIM on these ecological matrices is based on the cleanups that we are able to do (GPC, in particular). Several cleanup techniques are utilized to remove matrix interferences that affect the reporting limits. The cleanups allow us to better differentiate the target ions from the matrix.
PCBs/Aroclors are identified by running SW-846 8082. Our recent MDL studies have shown we can meet most risk-based goals.
Soil samples to be analyzed for metals are prepared in accordance with SW-846 3050B acid digestion (a technique that allows the sample to dissolve completely and works very well) or SW-846 3052 microwave-assisted acid digestion. Water samples are digested using SW-846 3005A. Interferences found in brackish estuaries, such as the presence of chloride, sodium and TDS affect turnaround time and recoveries.