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6 Quantitative Aspects of Analytical Chemistry
I questions
(1) Why does quantitation in Analytical Chemistry affect all three types of analysis (Qualitative, Quantitative and Instrumental)?
(2) What is the output of a quantitative analysis? Give meaningful examples.
(3) What analytical properties characterize, in a direct manner, the result of a
quantitative analysis?
(4) Distinguish equipment and method calibration in Quantitative Analysis.
(5) Comment on the metrological properties of a quantitative result in Analytical Chemistry.
(6) Place Quantitative Analysis in the panoramic view of Fig. 6.l.
(7) Discuss the relationships between the metrological quality of a quantitative
result and accessory analytical properties.
(8) What are the differences between Classical and Instrumental Quantitative
Analysis?
(9) Are base (SI) standards relevant to Quantitative Analysis? Are chemical and
analytical chemical standards?
(10) Why a given instrumental technique is normally better suited to one of the
analysis types shown in Fig. 6.3 than to the others? Give some examples.
(11) Can quantitative analyses be carried out via classical techniques involving
no human participation? Give an example.
(12) Explain the differences between a calculable and a relative quantitation
method.
(13) Why must a concentration expressed as a mass/volume ratio be converted
into a mass/mass one before an analytical result is delivered?
(14) What are the differences between relative interpolation methods and comparative methods?
(15) In what way are absolute methods involving some tangible analytical
chemical standard different from those that use none?
(16) What are stoichiometric quantitation methods?
(17) Can the temperature influence the expression of the analyte concentration
in mass/volume units? Why?
(18) Relate a 0.1 % concentration to the ppm scale and express it in JIM (analyte
molecular weight = 124).
(19) Which concentration is correct, 1.30 g/kg or 1.25 giL? Why?
(20) The result of a calculable method, obtained by solving the pertinent
formula with the aid of a pocket calculator, is 6.0324531242 g/kg. Is it correctlyexpressed?
(21) Express the concentration 1.23 millimoles/litre in ppb and ppm.
(22) Convert a quantitative analytical result of 0.3 ppm into ppb, g/kg and a percentage.
(23) Name six features of a calculable quantitation method used in Analytical
Chemistry.
(24) What are the most salient differences between the two types of calculable
methods? Give some examples.
6 Quantitative Aspects of Analytical Chemistry
I questions
(1) Why does quantitation in Analytical Chemistry affect all three types of analysis (Qualitative, Quantitative and Instrumental)?
(2) What is the output of a quantitative analysis? Give meaningful examples.
(3) What analytical properties characterize, in a direct manner, the result of a
quantitative analysis?
(4) Distinguish equipment and method calibration in Quantitative Analysis.
(5) Comment on the metrological properties of a quantitative result in Analytical Chemistry.
(6) Place Quantitative Analysis in the panoramic view of Fig. 6.l.
(7) Discuss the relationships between the metrological quality of a quantitative
result and accessory analytical properties.
(8) What are the differences between Classical and Instrumental Quantitative
Analysis?
(9) Are base (SI) standards relevant to Quantitative Analysis? Are chemical and
analytical chemical standards?
(10) Why a given instrumental technique is normally better suited to one of the
analysis types shown in Fig. 6.3 than to the others? Give some examples.
(11) Can quantitative analyses be carried out via classical techniques involving
no human participation? Give an example.
(12) Explain the differences between a calculable and a relative quantitation
method.
(13) Why must a concentration expressed as a mass/volume ratio be converted
into a mass/mass one before an analytical result is delivered?
(14) What are the differences between relative interpolation methods and comparative methods?
(15) In what way are absolute methods involving some tangible analytical
chemical standard different from those that use none?
(16) What are stoichiometric quantitation methods?
(17) Can the temperature influence the expression of the analyte concentration
in mass/volume units? Why?
(18) Relate a 0.1 % concentration to the ppm scale and express it in JIM (analyte
molecular weight = 124).
(19) Which concentration is correct, 1.30 g/kg or 1.25 giL? Why?
(20) The result of a calculable method, obtained by solving the pertinent
formula with the aid of a pocket calculator, is 6.0324531242 g/kg. Is it correctlyexpressed?
(21) Express the concentration 1.23 millimoles/litre in ppb and ppm.
(22) Convert a quantitative analytical result of 0.3 ppm into ppb, g/kg and a percentage.
(23) Name six features of a calculable quantitation method used in Analytical
Chemistry.
(24) What are the most salient differences between the two types of calculable
methods? Give some examples.