Total Analytical Process
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10.Interpret the data, prepare the results &
communicate the results.
Definition of the problem - what is required, how many
determinations, how sensitive, how accurate, what equipment is available,
how much sample is available, how quick is the answer needed, cost factors,
sample make up.
Select a method of analysis based on the problem at hand.
Obtain a representative sample. The sample must be uniform
(homogeneous), reasonably sized, representative of the total lot. Do you
remember about the Blind Man and the Elephant? Various samples require
Should the analysis be "as received" or dry for a given
time at a given temperature ex. 80oC., 100oC., 110oC.,
140oC., 180oC., 200oC. Dessicator.
Measures the homogeneous sample: weight or volume. Sometimes
easy others a challenge. The floor sweepings wash water.
Dissolve the sample- water, acid, heat, flux
Perform needed separations, oxidation to eliminate interferences,
Make the measurement.
Present the Data and calculate the results. Tables, rejections,
multiple tries, Q/A
the modified approach to the total analytical process method}