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5 Qualitative Aspects of Analytical Chemistry
I Questions
(1) What is a binary response?
(2) Define "test" and "screening" in connection with Qualitative Analysis.
(3) Why are physical measurements rarely qualitative in nature? Ask several
questions with a binary answer in this context.
(4) Distinguish "detection" and "identification" in Qualitative Analysis.
(5) Why is Qualitative Analysis the first step in a quantitative analysis?
(6) What is a white sample? Give some examples.
(7) Give several examples of qualitative information requirements at different
levels based on the scheme of Fig. 5.2.
(8) Elaborate on the differences between the first-level questions "is it the analyte?" and "is it in the sample?" through applicable examples.
(9) What is a grey sample? Give some examples.
(10) Distinguish "cut-off concentration" and "threshold concentration".
(11) Who imposes (a) the limit of detection, (b) the cut-off concentration and
(c) the threshold concentration?
(12) Which is more important for the purpose of assuring quality in the binary
response:
(a) that the limit of detection be high or low?;
(b) that the cut-off and threshold concentration be high or low?
(13) What is a black sample? Give several examples.
(14) Define the analytical property "reliability" and state the way it is expressed.
(15) Describe a false positive in relation to the three types of reference concentration.
(16) Give four examples of Qualitative Analysis and place them in each of the six
classifications of Fig. 5.6.
(17) On what analytical properties does reliability in Qualitative Analysis
depend?
(18) Which type of error in the binary response has a stronger impact on the
analytical problem? Why?
(19) Comment on the impact of selectivity on Classical and Instrumental
Qualitative Analysis.
(20) Describe a false negative in relation to the three types of reference concentration.
(21) What is the difference between Classical and Instrumental Qualitative
Analysis?
(22) Comment on the impact of sensitivity on Qualitative Analysis.
(23) Why does the reliability of qualitative analyses increase with increase in the
amount of available information?
(24) Give some examples of the use of standards in Classical Qualitative Analysis.
(25) What is an analytical scheme? What are the main types of scheme? What are
their differences?
(26) Give several examples of equipment calibration in Instrumental Qualitative
Analysis.
5 Qualitative Aspects of Analytical Chemistry
I Questions
(1) What is a binary response?
(2) Define "test" and "screening" in connection with Qualitative Analysis.
(3) Why are physical measurements rarely qualitative in nature? Ask several
questions with a binary answer in this context.
(4) Distinguish "detection" and "identification" in Qualitative Analysis.
(5) Why is Qualitative Analysis the first step in a quantitative analysis?
(6) What is a white sample? Give some examples.
(7) Give several examples of qualitative information requirements at different
levels based on the scheme of Fig. 5.2.
(8) Elaborate on the differences between the first-level questions "is it the analyte?" and "is it in the sample?" through applicable examples.
(9) What is a grey sample? Give some examples.
(10) Distinguish "cut-off concentration" and "threshold concentration".
(11) Who imposes (a) the limit of detection, (b) the cut-off concentration and
(c) the threshold concentration?
(12) Which is more important for the purpose of assuring quality in the binary
response:
(a) that the limit of detection be high or low?;
(b) that the cut-off and threshold concentration be high or low?
(13) What is a black sample? Give several examples.
(14) Define the analytical property "reliability" and state the way it is expressed.
(15) Describe a false positive in relation to the three types of reference concentration.
(16) Give four examples of Qualitative Analysis and place them in each of the six
classifications of Fig. 5.6.
(17) On what analytical properties does reliability in Qualitative Analysis
depend?
(18) Which type of error in the binary response has a stronger impact on the
analytical problem? Why?
(19) Comment on the impact of selectivity on Classical and Instrumental
Qualitative Analysis.
(20) Describe a false negative in relation to the three types of reference concentration.
(21) What is the difference between Classical and Instrumental Qualitative
Analysis?
(22) Comment on the impact of sensitivity on Qualitative Analysis.
(23) Why does the reliability of qualitative analyses increase with increase in the
amount of available information?
(24) Give some examples of the use of standards in Classical Qualitative Analysis.
(25) What is an analytical scheme? What are the main types of scheme? What are
their differences?
(26) Give several examples of equipment calibration in Instrumental Qualitative
Analysis.