Three factors were studied: reactor length, carrier flow rate, and sample volume, with the high and low values summarized in the following table.
Three factors were studied: reactor length, carrier flow rate, and sample volume, with the high and low values summarized in the following table.
Chemistry
10th Edition
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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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- Three factors were studied: reactor length, carrier flow rate, and sample volume, with the high and low values summarized in the following table.
|
factor |
high (+1) level |
low (–1) level |
|
X: reactor length |
1.3 cm |
2.0 cm |
|
Y: carrier flow rate |
1.6 mL/min |
2.2 mL/min |
|
Z: sample volume |
100 μL |
150μL |
The authors determined the optimum response based on the greatest sensitivity, as determined by the change in potential for the potentiometric detector. The following table summarizes their optimization results.
|
run |
X* |
Y* |
Z* |
ΔE (mV) |
|
1 |
–1 |
–1 |
–1 |
37.45 |
|
2 |
+1 |
–1 |
–1 |
31.70 |
|
3 |
–1 |
+1 |
–1 |
32.10 |
|
4 |
+1 |
+1 |
–1 |
27.30 |
|
5 |
–1 |
–1 |
+1 |
39.85 |
|
6 |
+1 |
–1 |
+1 |
32.85 |
|
7 |
–1 |
+1 |
+1 |
35.00 |
|
8 |
+1 |
+1 |
+1 |
32.15 |
- Which factor has the greatest effect on sensitivity (change in potential at the detector)?
- Which set of conditions optimizes the detection sensitivity?
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