PRINCIPLES OF INSTRUMENTAL ANALYSIS
7th Edition
ISBN: 9789353506193
Author: Skoog
Publisher: CENGAGE L
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Chapter 15, Problem 15.14QAP
Interpretation Introduction
Interpretation:
The expression which shows the independence of collision quenching and direct relation to concentration by
Concept introduction:
The quantum efficiency of fluorescence is the ratio of quantum efficiency of fluorescence and the natural lifetime of the excited state in absence of quenching agent.
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4. Draw and label all possible isomers for [M(py)3(DMSO)2(CI)] (py = pyridine, DMSO
dimethylsulfoxide).
The emission data in cps displayed in Table 1 is reported to two decimal places by the
chemist. However, the instrument output is shown in Table 2.
Table 2. Iron emission from ICP-AES
Sample
Blank
Standard
Emission, cps
579.503252562
9308340.13122
Unknown Sample
343.232365741
Did the chemist make the correct choice in how they choose to display the data up in Table
1? Choose the best explanation from the choices below.
No. Since the instrument calculates 12 digits for all values, they should all be kept and not truncated.
Doing so would eliminate significant information.
No. Since the instrument calculates 5 decimal places for the standard, all of the values should be
limited to the same number. The other decimal places are not significant for the blank and unknown
sample.
Yes. The way Saman made the standards was limited by the 250-mL volumetric flask. This glassware
can report values to 2 decimal places, and this establishes our number of significant figures.
Yes. Instrumental data…
Chapter 15 Solutions
PRINCIPLES OF INSTRUMENTAL ANALYSIS
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