Compute the concentration of cocaine

Reference no: EM13173843

The total mass of cocaine in a 100.00 mL sample of urine was extracted into methylene chloride. After addition of 0.200 g an internal standard, the extract mixture was diluted to exactly 25 mL. Injection of 1.0 ?L of the prepared sample onto a GC column at 225°C yielded peak areas of 680 for cocaine and 606 for the internal standard. Using the calibration data provided below, calculate the concentration of cocaine (mg/mL) in the original urine sample

Reference no: EM13173843

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