ainty ill Ul Gol Data from M. J. GOIUCU S. Harshman, and K. Ashley, J. Chem. Ed. 2008, 83, YJU. jor source of tion of Sr in (a) Volume is not constant, so follow the procedure of Figures 5-5 and 5-6 to find ppm Pb(II) in the 1.00-mL extract (b) Use the formula in Problem 5-19 to find the uncertainty in the intercept of the graph. Assuming that the uncertainty in intercept is larger than other uncertainties, estimate the uncertainty in ppm Pb(II) in the 1.00-mL extract. 5-22. Internal standard. A mixture containing 12.8 uM analyte (X) and 44.4 µM standard (S) gave chromatographic peak areas of 306 for X and 511 for S. A second solution containing an unknown quantity of X plus 55.5 µM S had peak areas of 251 for X and 563 for S. Find [X] in the second ws standard ured by an 1 negligible ple, so you The signal o measure tration of solution. 5-23. Internal standard. A solution was prepared by mixing 10.00 mL of unknown (X) with 5.00 mL of standard (S) con- taining 8.24 µg S/mL and diluting to 50.0 mL. The measured signal quotient (signal due to X/signal due to S) was 1.69. In a separate experiment it
ainty ill Ul Gol Data from M. J. GOIUCU S. Harshman, and K. Ashley, J. Chem. Ed. 2008, 83, YJU. jor source of tion of Sr in (a) Volume is not constant, so follow the procedure of Figures 5-5 and 5-6 to find ppm Pb(II) in the 1.00-mL extract (b) Use the formula in Problem 5-19 to find the uncertainty in the intercept of the graph. Assuming that the uncertainty in intercept is larger than other uncertainties, estimate the uncertainty in ppm Pb(II) in the 1.00-mL extract. 5-22. Internal standard. A mixture containing 12.8 uM analyte (X) and 44.4 µM standard (S) gave chromatographic peak areas of 306 for X and 511 for S. A second solution containing an unknown quantity of X plus 55.5 µM S had peak areas of 251 for X and 563 for S. Find [X] in the second ws standard ured by an 1 negligible ple, so you The signal o measure tration of solution. 5-23. Internal standard. A solution was prepared by mixing 10.00 mL of unknown (X) with 5.00 mL of standard (S) con- taining 8.24 µg S/mL and diluting to 50.0 mL. The measured signal quotient (signal due to X/signal due to S) was 1.69. In a separate experiment it
Chapter31: Introduction To Analytical Separations
Section: Chapter Questions
Problem 31.19QAP
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Question
5-22 is my question.
![ainty ill Ul
Gol
Data from M. J. GOIUCU
S. Harshman, and K. Ashley, J. Chem. Ed. 2008, 83, YJU.
jor source of
tion of Sr in
(a) Volume is not constant, so follow the procedure of
Figures 5-5 and 5-6 to find ppm Pb(II) in the 1.00-mL extract
(b) Use the formula in Problem 5-19 to find the uncertainty
in the intercept of the graph. Assuming that the uncertainty
in intercept is larger than other uncertainties, estimate the
uncertainty in ppm Pb(II) in the 1.00-mL extract.
5-22. Internal standard. A mixture containing 12.8 uM
analyte (X) and 44.4 µM standard (S) gave chromatographic
peak areas of 306 for X and 511 for S. A second solution
containing an unknown quantity of X plus 55.5 µM S had
peak areas of 251 for X and 563 for S. Find [X] in the second
ws standard
ured by an
1 negligible
ple, so you
The signal
o measure
tration of
solution.
5-23. Internal standard. A solution was prepared by mixing
10.00 mL of unknown (X) with 5.00 mL of standard (S) con-
taining 8.24 µg S/mL and diluting to 50.0 mL. The measured
signal quotient (signal due to X/signal due to S) was 1.69. In a
separate experiment it](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc7b14be2-e68e-4fb7-b09e-c925d83f45e3%2Ff8e33f89-def7-4515-9afb-1687dfc1ca00%2Fbi70m38.jpeg&w=3840&q=75)
Transcribed Image Text:ainty ill Ul
Gol
Data from M. J. GOIUCU
S. Harshman, and K. Ashley, J. Chem. Ed. 2008, 83, YJU.
jor source of
tion of Sr in
(a) Volume is not constant, so follow the procedure of
Figures 5-5 and 5-6 to find ppm Pb(II) in the 1.00-mL extract
(b) Use the formula in Problem 5-19 to find the uncertainty
in the intercept of the graph. Assuming that the uncertainty
in intercept is larger than other uncertainties, estimate the
uncertainty in ppm Pb(II) in the 1.00-mL extract.
5-22. Internal standard. A mixture containing 12.8 uM
analyte (X) and 44.4 µM standard (S) gave chromatographic
peak areas of 306 for X and 511 for S. A second solution
containing an unknown quantity of X plus 55.5 µM S had
peak areas of 251 for X and 563 for S. Find [X] in the second
ws standard
ured by an
1 negligible
ple, so you
The signal
o measure
tration of
solution.
5-23. Internal standard. A solution was prepared by mixing
10.00 mL of unknown (X) with 5.00 mL of standard (S) con-
taining 8.24 µg S/mL and diluting to 50.0 mL. The measured
signal quotient (signal due to X/signal due to S) was 1.69. In a
separate experiment it
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