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15 Nov 2019
Sapling Learning macmitan learning A researcher was attemping to quantify the amount of DDT (dichlorodiphenyltrichloroethane) in spinach with gas chromotography using a chloroform internal standard. To begin, the researcher examined a sample containing 8.03 mg/L DDT standard and 1.80 mg/L chloroform as the internal standard, producing peak areas of 2593 and 12079, respectively en, the researcher collected 5.97 g of spinach, homogenized the sample, and extracted the DDT sing an established method (assume 100% extraction), producing a 3 43 mL volume of unknown sample. The researchar then prepared a sample that contained 1.00 mL of the unknown sample and 1.50 mL of 12.54 mg/L chloroform, which was diluted to a final volume of 25.00 mL. The sample was for the unknown and chloroform respectively. Calculate the DDT concentration in the spinach sample. Express the final answer as miligrams DDT per gram of spinach
Sapling Learning macmitan learning A researcher was attemping to quantify the amount of DDT (dichlorodiphenyltrichloroethane) in spinach with gas chromotography using a chloroform internal standard. To begin, the researcher examined a sample containing 8.03 mg/L DDT standard and 1.80 mg/L chloroform as the internal standard, producing peak areas of 2593 and 12079, respectively en, the researcher collected 5.97 g of spinach, homogenized the sample, and extracted the DDT sing an established method (assume 100% extraction), producing a 3 43 mL volume of unknown sample. The researchar then prepared a sample that contained 1.00 mL of the unknown sample and 1.50 mL of 12.54 mg/L chloroform, which was diluted to a final volume of 25.00 mL. The sample was for the unknown and chloroform respectively. Calculate the DDT concentration in the spinach sample. Express the final answer as miligrams DDT per gram of spinach
Keith LeannonLv2
5 May 2019