Laserfiche WebLink
ANALYTICAL METHODOLOGY <br /> Total Petroleum Hydrocarbons (TPH) Extractables by GC-FID <br /> Extraction Procedure: <br /> WATER - k <br /> I• <br /> A 1 .liter sample is poured into a 2 liter separatory funnel. 3x100 i'ml <br /> extractions with methylene chloride (2 .minute shake outs) are completed. <br /> The methylene chloride is decanted off.and concentrated to a 5 ml final <br /> volume. <br /> SOIL - <br /> A 30 gram, or other appropriate aliquot of soil, is mixed with 10 .grams of <br /> washed sodium sulfate. 100 mis of methylene chloride is added to the soil <br /> and placed on a mechanical shaker for 1 hour. The liquid is decanted off <br /> and the process is repeated with an additional 50 mi of methylene :chloride. j <br /> The combined solvent extracts are filtered through sodium sulfate and the <br /> extract is concentrated to a 5 ml final volume. <br /> i! <br /> I <br /> f <br /> GC ANALYSIS - p <br /> An appropriate volume of the sample extract is injected into a Gas <br /> Chromatograph equipped with a .Flame Ionization Detector (FED), a split/ � <br /> splitless capillary injector (operated in the splitless mode), '!and a. fused <br /> silica capillary column. The TPH fraction is quantitated as �gasoline and/or <br /> #2 diesel fuel (and/or different petroleum hydrocarbon fuel types if <br /> requested, such as JP-4 jet fuel) based on relative retention times .,and <br /> examination of the elution profile. The TPH fraction quantitation isr based <br /> on chromatographic peak areas against a multipoint standard curve: <br /> i <br /> 14 <br /> f <br /> } <br /> F <br /> .. I <br /> I <br /> I <br /> CHEMWEST ANALYTICAL LABORATORIES.INC. <br />