preparation of soil, sediment, and solid waste samples for ICP-OES and ICP-MS analysis. If samples are being prepared for ICP-MS analysis, it is recommended to dilute samples further due to the acid concentration in the digestate. Step 1: Homogenize and accurately weigh 0.1 g of the soil or sediment sample into a polytetrafluoroethylene (PTFE)
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and EPA method 5021, 5 mL of modifier was added to the vial in this study. We evaluated two different volumes of modifier solution and determined that the peak area with 5 mL of modifier is larger than that with 10 mL of modifier especially for polar compounds which have a larger partition coefficient (K) in the soil matrix.
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The radioactive sample and cocktail mixtures are placed into small transparent vials and the low levels of beta radiation are measured using the Quantulus System. Vern’s team typically processes two vials per week, testing 2 ml of the biofuel component mixture each time.
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