An Internal Standard Curve Is Described by the Linear Equation

question 45

Multiple Choice

An internal standard curve is described by the linear equation y = 20.42x - 0.7223. A sample is analyzed and the ratio of the area counts of the target analyte to the internal standard is 1.052. The internal standard concentration is 75.0 ppb. What is the concentration of the target analyte in the sample (ppb, 2 decimal places) ?

• A)
• B) 1.21
• C) 6.52
• D) 17.43
• E) none of the above

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