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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Definitions:

V(X + Y)

The variance of the sum of two random variables, considering both their individual variances and covariance.

V(X)

The variance of a random variable X, representing the expectation of the squared deviation of X from its mean.

V(Y)

The notation for the variance of a random variable Y, measuring the spread of its values.

Joint Probability

The probability of two events occurring together or at the same point in time.