Quantitative Chemical Analysis
Quantitative Chemical Analysis
9th Edition
ISBN: 9781464135385
Author: Daniel C. Harris
Publisher: W. H. Freeman
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Chapter 20, Problem 20.35P
Interpretation Introduction

Interpretation:

The expected detection limits for given an ideal experiment has to be discussed.

Expert Solution & Answer
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Explanation of Solution

The limit for O2 is relative detection air from photoacoustic spectroscopy decreases with increasing signal averaging time.  The more period of times consumed averaging out noise, the lower the detection limit, up to an averaging time of 80 s .

The ratio of signal to noise is increased in proportion to the square root of the number of cycles that may be averaged.

Numberofcycles=nnSNratio11º1100101030017.3217.32100031.6231.62

We get average of 1000 cycles is observed when the SNratio is 60 the calculated the SNratio for other experiment can be listed below

Numberofcycles=nnSNratio1000606030060(17.3231.62)=32.935.910060(17.3231.62)=1920.9160(17.3231.62)=1.91.95

The graph is plotted averaging time and relative detection limit.

In this graph measure the absorption of the O2

Quantitative Chemical Analysis, Chapter 20, Problem 20.35P

Figure 1

Conclusion

The expected detection limits for given an ideal experiment has to be discussed.

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