apling learning Atomic absorption spectroscopy was used to determine the amount

Question

apling learning Atomic absorption spectroscopy was used to determine the amount of aluminum in a sample of sunscreen. A standard solution of 1.00 ng AllL was prepared and measured seven times to determine the detection and quantitation limits of the spectrometer. The standard measurements were as follows: 0.77, 0.88, 1.30, 1.11, 0.88, 1.23, and 1.09 ng Al/L. Use the equations provided in the "Hint" section below to calculate the detection and quantitation limits for this instrument Number Detection Limit ng/L Number Quantitation Limit ng/ L Previous Give Up & View Solution Check Answer Next Exit Hint Use these equations to calculate each limit for the atomic absorption experiment. Detection Limit-3 Quantitation Limit 10 where s/m is the standard deviation in concentration measurements.

Explanation / Answer

Data:

.77, .88, 1.30, 1.11, .88, 1.23, 1.09

Calculate standard deviation of data here: http://www.mathportal.org/calculators/statistics-calculator/standard-deviation-calculator.php

Standard deviation = s/m = .1979

Detection limit i= 3 * .1979= .5937 ng/L

Quantitation limit = 10 * .1979= 1.979 ng/L

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