Types of Quantitative Analysis Flashcards
- determine the mass of the analyte or some compound chemically related to it.
Gravimetric Method
→ In this analysis, the analyte (substance of interest) is converted to an insoluble
substance (precipitate) that is isolated and weighed.
Gravimetric Method
Example:
In the analysis of lead (II), it is precipitated as lead sulfate.
Gravimetric Method
- the volume of a solution of a known concentration, containing sufficient reagent to react completely with the analyte is measured.
Volumetric Method
Example:
Acid-base titration
Volumetric Method
Instrumentation Methods - with the use of scientific instruments
Instrumentation Methods
– study an analyte by measuring potential and/or current in an electrochemical cell containing the analyte.
Electroanalytical method
Example:
Measuring pH using pH meter that uses glass membrane electrode. The pH then is related
to the concentration of hydronium ions in an analyte.
Instrumentation Methods
UV-VIS Spectrophotometry which measures the concentration of solution by the
amount of light absorbed by the substance across UV-Visible ranges of the electromagnetic spectrum.
Instrumentation Methods -
Flame photometry
Instrumentation Methods
Mass spectrometry
Instrumentation Methods
Chromatography
Instrumentation Methods
Electrophoresis
Instrumentation Methods
Optical activity
Instrumentation Methods
Refractive Index
