Laserfiche WebLink
ANALYTICAL METHODOLOGY <br /> Total Petroleum Hydrocarbons (TPH) Extractables by GC/FID <br /> Extraction Procedure: <br /> WATER - <br /> A l liter sample is poured into a 2 liter separatory funnel. . 3x100 ml <br /> aliquots of methylene chloride (2 minute shake outs) are completed. The <br /> methylene chloride is decanted off and concentrated to a 5 ml final volume. <br /> SOIL - <br /> 30 grams of soil is mixed with 10 grams of washed sodium sulfate. 100 mis <br /> of methylene chloride is added to the soil and placed on a mechanical <br /> shaker for 1 hour. The liquid is decanted. off and the process is 'repeated <br /> with an additional 50 ml of methylene chloride. The combined solvent <br /> extract is filtered through sodium sulfate and the extract is concentrated to <br /> a 5 ml final volume. <br /> h <br /> GC ANALYSIS - <br /> 3 ul's of the sample extract is injected into a Varian 3400 GC equipped <br /> with a Flame Ionization Detector, (FID), a split/splitless capillary injector <br /> operated in the splitless made and a 30 meter, 0.25 mm ID, DB-5 capillary <br /> column temperature programmed from 40 to 280 deg C. The TPH fraction is <br /> quantitated as gasoline and/or diesel fuel (and/or different petroleum <br /> hydrocarbon fuel types if requested, such as JP-4 jet fuel) based on relative <br /> retention times against a multipoint standard curve. The TPH fraction <br /> quantitation is based on chromatographic peak areas. <br /> t <br /> CHEMWEST ANALYTICAL LABORATORIES.VC. <br />