Grade 1/14/2018 12:00 PM9.5/201/11/2018 10:51 AM Print Calculator Est Periocic T
ID: 1074658 • Letter: G
Question
Grade 1/14/2018 12:00 PM9.5/201/11/2018 10:51 AM Print Calculator Est Periocic Tutle Question 7 of 9 Map Sapling Learning A researcher is interested in determining the detection and quantitation limits of a method for the detection 78.1, 47.1, Ten method blanks gave the following dimensionless instrument re of 35.1,47.1, 92.1, 32.9, 84.9,70.5, 37.5, and 78.3. T Ten samples containing a low concentration of near the delection limit had a mean reading of 196.1. The slope of the calibration curve is 1.46 x10 M Estimate the signal and concentration detection limits and the lower limit of quantitation for methylmercury Number Signal Detection Limit: Number Concentration Detection Limit:0 Lower LimitofQuantitation I[D Check Answer Next E Hint aboutui l careers | pnvacy policy tamio!…Explanation / Answer
The average of the measurements is: 60.36 The standard deviation is: 22.64. We assume the standard deviation of the blanks is the same.
So, the signal at the detection limit is:
yLOD = yblank + 3sblank yLOD = 196.1 + 3(22.64) = 264.02
We can use the slope to convert this to a concentration: LOD = 264.02/(1.46x10^9 M-1) = 1.808x10^-7 M
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