Chapter 0:
The Analytical Process (Example)
1. Formulating the Question
2. Selecting Analytical Procedures
3. Sampling
Random Heterogeneous Material
Segregated Heterogeneous Material
4. Sample Preparation
5. Analysis
6. Reporting and Interpretation
7. Drawing Conclusions
Terminology to Know From the Example
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representative sampling – random vs. segregated
sample preparation
extraction, centrifugation, filtering
chromatography, stationary phase, adsorption
aliquot
calibration curve
Chapter 2:
Tools of the Trade
Mechanical Balance
Electronic Balance
Buoyancy correction - a sample appears lighter than its
actual mass by an amount equal to the mass of the air it
displaces.
 da 

m 1 

d
w

m 
 da 
1  
d 

'
Example: Find the true mass of water
(density = 1.00 g/mL) if the apparent
mass is 100.00g
Calibration of Volumetric Glassware
True volume = mass H2O x
correction factor
Example p. 49: an empty weighing bottle
had a mass of 10.283 g. After water was
added from a 25-mL pipet, the mass was
35.225 g. The temperature was 23oC. Find
the volume of water delivered by the pipet.