The lead level in a sample of contaminated soil was determined using AAS. 2.0 g sample was dissolved in acid and then diluted to a total volume of 50. L. The absorbance of this solution, determined in a spectrometer at wavelength of 218 nm, was found to be 0.20. Several standard solutions wer ested under the same conditions and a calibration curve shown below wa obtained.

Appl Of Ms Excel In Analytical Chemistry
2nd Edition
ISBN:9781285686691
Author:Crouch
Publisher:Crouch
Chapter2: Basic Statistical Analysis With Excel
Section: Chapter Questions
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i) the sensitivity of method.

ii) the concentration of lead in the soil in mg/kg.

The lead level in a sample of contaminated soil was determined using AAS. A
2.0 g sample was dissolved in acid and then diluted to a total volume of 50.0
mL. The absorbance of this solution, determined in a spectrometer at a
wavelength of 218 nm, was found to be 0.20. Several standard solutions were
tested under the same conditions and a calibration curve shown below was
obtained.
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
5.0
10.0
concentration of Pb (mg L-1)
absorbance
Transcribed Image Text:The lead level in a sample of contaminated soil was determined using AAS. A 2.0 g sample was dissolved in acid and then diluted to a total volume of 50.0 mL. The absorbance of this solution, determined in a spectrometer at a wavelength of 218 nm, was found to be 0.20. Several standard solutions were tested under the same conditions and a calibration curve shown below was obtained. 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 5.0 10.0 concentration of Pb (mg L-1) absorbance
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