Chemistry 101, Lecture on February 26th
Using chemical processes to find out
What chemicals are present (qualitative)
And how much (quantitative)
Samples are analyzed and the analytes are determined.
Analytes are identified and quantified. The processes are identification.
Qualitative analysis: perform some diagnostic chemistry and compare what
happens with results for authentic material (may be in memory)
example, the detection of iron by reaction with thiocynate
Detect inorganic arsenic by formation of colored product with mercuric bromide
exposed to arsine vapor formed by reaction of inorganic arsenic with zinc in acid
Gutzeit - Marsh test
Quantitative analysis, perform some chemistry and measure the extent of the
reaction. Or perform some chemistry and compare the extent of the reaction with