Seminar
279
(3) Percentage H ppm-ppb.
(4) Mass/mass H moles (milli, micro )/litre.
(c) Perform 20 numerical simulations of conversions between different ways
of expressing a result.
• Discussion
Establish generic conclusions from the previous conversions. Comment on
the significance of the mass (volume) of the sample aliquot that is subjected
to the CMP. Bear in mind Figs 1.23 and 1.24, which classify chemical analyses
according to initial sample size and relative proportion of analyte mass in the
sample.
Seminar 6.3
Use of Standards in Quantitative Analysis
• Learning objective
To explain the different approaches to the use of references with a view to
quantifying in Analytical Chemistry, approaches with dictate the type of
method to be employed.
• Literature
• Monographs and textbooks on classical and instrumental techniques.
• Compilations of standard and officially endorsed methods.
• Calculable methods (examples)
• Gravimetric determination of moisture.
• Titrimetric determination of moisture (Karl Fischer method).
• Titrimetric determination of the silver content (fineness) in a jewel.
• Gravimetric determination of calcium in a rock.
• Titrimetric determination of water hardness.
• Relative methods (examples)
• Determination of metal traces in sea water by atomic absorption spectroscopy.
• Determination of the iron content in an alloy by X-ray fluorescence.
• Photometric (UV-visible) determination of the aldehyde and ketone contents in mixtures by reaction with dinitrophenylhydrazone.
• Discussion and description
Once the method is selected and the procedure involved in the CMP described, specify the standards (classified by type) and calibration (equipment
or method) used. From this information, place each method studied in the
general classification of quantitation approaches.
279
(3) Percentage H ppm-ppb.
(4) Mass/mass H moles (milli, micro )/litre.
(c) Perform 20 numerical simulations of conversions between different ways
of expressing a result.
• Discussion
Establish generic conclusions from the previous conversions. Comment on
the significance of the mass (volume) of the sample aliquot that is subjected
to the CMP. Bear in mind Figs 1.23 and 1.24, which classify chemical analyses
according to initial sample size and relative proportion of analyte mass in the
sample.
Seminar 6.3
Use of Standards in Quantitative Analysis
• Learning objective
To explain the different approaches to the use of references with a view to
quantifying in Analytical Chemistry, approaches with dictate the type of
method to be employed.
• Literature
• Monographs and textbooks on classical and instrumental techniques.
• Compilations of standard and officially endorsed methods.
• Calculable methods (examples)
• Gravimetric determination of moisture.
• Titrimetric determination of moisture (Karl Fischer method).
• Titrimetric determination of the silver content (fineness) in a jewel.
• Gravimetric determination of calcium in a rock.
• Titrimetric determination of water hardness.
• Relative methods (examples)
• Determination of metal traces in sea water by atomic absorption spectroscopy.
• Determination of the iron content in an alloy by X-ray fluorescence.
• Photometric (UV-visible) determination of the aldehyde and ketone contents in mixtures by reaction with dinitrophenylhydrazone.
• Discussion and description
Once the method is selected and the procedure involved in the CMP described, specify the standards (classified by type) and calibration (equipment
or method) used. From this information, place each method studied in the
general classification of quantitation approaches.