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An analysis of the calibration data for the determination of lead based upon its flame emission spectrum yielded an equation: S = 1.12C + 0.312 where C is the Pb concn in ppm and S is a measure of the relative emission intensity. The following replicate data were obtained: 9. Concentration, ppm Number of replicates Mean value of S Standard deviation 10.0 10 11.62 0.15 1.00 10 1.12 0.025 24 0.0296 0.0082 Calculate (a) the calibration sensitivity and (b) the detection limit. [1.12; 0.022]

An analysis of the calibration data for the determination of lead based upon its flame emission spectrum yielded an equation: S = 1.12C + 0.312 where C is the Pb concn in ppm and S is a measure of the relative emission intensity. The following replicate data were obtained: 9. Concentration, ppm Number of replicates Mean value of S Standard deviation 10.0 10 11.62 0.15 1.00 10 1.12 0.025 24 0.0296 0.0082 Calculate (a) the calibration sensitivity and (b) the detection limit. [1.12; 0.022]

Chemistry
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Kindly help me answer #9. the answers are on the bracket. Thank you!

1:30 PM Sun Oct 11 * 100% a learn-ap-southeast-1-prod-fleet02-xythos.s3.ap-southeast-1.amazonaws.com Diglidi, IA J.0 5.0 4.2 4.0 0.0 Reagent blanks gave the following values: Blank 1 3 4 5 7 Signal, nA 1.4 2.2 1.7 0.9 0.4 1.5 0.7 The slope of the calibration curve for higher concentrations is m = 0.229 nA/µM. (a) Find the signal detection limit and the minimum detectable concentration. (b) What is the concentration of analyte in a sample that gave a signal of 7.0 nA. [2.9; 7.3; 25.0] 8. Low concentrations of EDTA near the detection limit gave the following dimensionless instrument readings: Replicate Reading 1 2 3 4 5 7 8 9. 10 175 104 164 193 131 189 155 133 151 176 Ten blanks had a mean reading of 45.0. The slope of the calibration curve is 1.75 x 10° M²'. Estimate the signal and concentration detection limits and the lower limit of quantitation of EDTA. [129; 4.8 x 10-8; 1.6 x 10-7] An analysis of the calibration data for the determination of lead based upon its flame emission spectrum yielded an equation: S =1.12C + 0.312 where C is the Pb concn in ppm and S is a measure of the relative emission intensity. The following replicate data were obtained: 9. Concentration, pm Number of replicates Mean value of S Standard deviation 10.0 10 11.62 0.15 1.00 10 1.12 0.025 24 0.0296 0.0082 Calculate (a) the calibration sensitivity and (b) the detection limit. [1.12; 0.022]
Transcribed Image Text:1:30 PM Sun Oct 11 * 100% a learn-ap-southeast-1-prod-fleet02-xythos.s3.ap-southeast-1.amazonaws.com Diglidi, IA J.0 5.0 4.2 4.0 0.0 Reagent blanks gave the following values: Blank 1 3 4 5 7 Signal, nA 1.4 2.2 1.7 0.9 0.4 1.5 0.7 The slope of the calibration curve for higher concentrations is m = 0.229 nA/µM. (a) Find the signal detection limit and the minimum detectable concentration. (b) What is the concentration of analyte in a sample that gave a signal of 7.0 nA. [2.9; 7.3; 25.0] 8. Low concentrations of EDTA near the detection limit gave the following dimensionless instrument readings: Replicate Reading 1 2 3 4 5 7 8 9. 10 175 104 164 193 131 189 155 133 151 176 Ten blanks had a mean reading of 45.0. The slope of the calibration curve is 1.75 x 10° M²'. Estimate the signal and concentration detection limits and the lower limit of quantitation of EDTA. [129; 4.8 x 10-8; 1.6 x 10-7] An analysis of the calibration data for the determination of lead based upon its flame emission spectrum yielded an equation: S =1.12C + 0.312 where C is the Pb concn in ppm and S is a measure of the relative emission intensity. The following replicate data were obtained: 9. Concentration, pm Number of replicates Mean value of S Standard deviation 10.0 10 11.62 0.15 1.00 10 1.12 0.025 24 0.0296 0.0082 Calculate (a) the calibration sensitivity and (b) the detection limit. [1.12; 0.022]
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