Question
In: Chemistry
13. The following calibration data were obtained for a total organic carbon analyzer (TOC) measuring TOC...
13. The following calibration data were obtained for a total organic carbon analyzer (TOC) measuring TOC in water:
|
Concentration, ug/l |
Number of replicates |
Mean Signal |
Standard Deviation |
|
0 |
20 |
0.03 |
0.008 |
|
6.0 |
10 |
0.45 |
0.0084 |
|
10.0 |
7 |
0.71 |
0.0072 |
|
19.0 |
5 |
1.28 |
0.015 |
Calculate the calibration sensitivity.
What is the detection limit for this method?
Calculate the relative standard deviation for each of the replicate sets.
Solutions
Expert Solution
Step I
Plot the concentration vs mean signal to get the slope which will be the calibration sensitivity of the TOC analyser.
m = 0.0656
Step II
Detection limit = (k*Sb)/m
Step III
Just put values of Standard deviation and m with k = 2 or 3 based on % of confident interval and calculate the limit of detection.
queen_honey_blossom answered 2 years agoRelated Solutions
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Initial [A] (mol/L)
Initial [B] (mol/L)
Initial [C] (mol/L)
Initial Rate (mol/L . s)
1
0.2790
0.1670
0.0334
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[S](mM)
1
ν(μmol/mL. sec)
2
ν(μmol/mL. sec)
3
ν(μmol/mL. sec)
1
12
4.3
5.5
2
20
8
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29
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13
5
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21
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40
26
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Assume that the population is normally distributed. Complete parts
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10.30 20.46 14.90 33.67 30.91 14.86 11.40 15.35 9.72 19.80 14.86
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5.20
29.80
27.10
16.51
16.87
8.81
5.30
20.46
14.90
33.67
30.91
14.86
11.90
15.35
9.72
19.80
14.86
8.09
11.90
18.30
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Time (min)
0
10
20
40
60
80 100
A (mg/lit)
100
74
55
30
17
9 5
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Develop an expression for the
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March 80 2,000
April 30 833.5
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