Harris, Exploring Chemical Analysis 4e Chapter 00
A chemical firm was hired to monitor a nearby lake for possible mercury contamination. Several samples
were taken at different locations around the lake, including water samples, lake bottom samples, and
plant samples. When the chemist returned to the laboratory, the water samples were the first to be
analyzed. The analysis began by removing a number of aliquots. An aliquot is:
a) a measure of the contamination of the lake water.
b) a combined measure of the contamination in the lake.
c) a precise liquid sample taken for analysis.
c.) This is the correct answer.
The sampling technique is very important when analyzing a large area, or vast amounts of material
because you can't analyze everything. When preparing a composite sample, a chemist would:
The steps in a chemical analysis are: