An Analyst Performs and External Standard Calibration for Fentanyl and Obtains

question 21

Multiple Choice

An analyst performs and external standard calibration for fentanyl and obtains the following data points (concentration in ppb, area counts) :
20.0, 9599
50.0, 21456
100.0, 45326
250.0, 102391
500.0, 210561
Using the resulting calibration curve, calculate the concentration of fentanyl (ppb) in a sample that generates area counts of 48722 (4 digits) .

• A) 114.0
• B) 39.80
• C) 386.0
• D) 59.80
• E) none of the above

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