part 1 Flashcards
analytical chemistry is the basis for clinical
laboratory tests which help physicians diagnose disease.
In medicine
: analytical chemistry provides the means of testing
raw material and assuring the quality of finished products.
Industry
: the air in the cities must be analyzed
for detecting carbon monoxide or ocean contamination.
Environmental quality
: analysis related to criminology
Forensic analysis
An analysis in which we determine the identity of the
constituent in a sample.
Qualitative analysis
An analysis in which we determine how much of a
constituent is present in a sample.
Quantitative analysis
It depends on simple classical technique to determine the
mass, volume.
Classical chemical analysis
(last measurement is volume
Volumetric analysis
(last measurement is mass).
Gravimetric analysis
This analysis depends on the physical properties of the
sample where there is no reaction involved .
Instrumental analysis:
(based on interaction of light with matter)
Spectro-analysis
(based upon electron-transfer)
Electro-analysis
Thi s means that the analysts should know what information is required, the type and amount of sample, the precision and accuracy of the result, the analytical method which can be used to achieve these results
Define the problem
This portion need to have the same characteristics of the whole sample in order to obtain the actual
Obtain a representative sample
samples need to be dissolved quantitatively and may also be diluted to the concentration range of the method if they are present in a high concentration.
Sample preparation
