CALIBRATION
GRAPH (noun)
A graph
that is used to determine an unknown value. Example: in a colorimetry
experiment, a chemist would prepare, say, 5 solutions of aqueous Cu(SO4)2,
each with a different concentration, and then scan each sample with a colorimeter
to determine the absorbance
of each sample. The chemist would then plot a graph of absorbance vs. concentration.
This is the calibration graph. The chemist could then scan the absorbance
of a sample of Cu(SO4)2 of unknown concentration, and
from the reading and the calibration graph, determine its concentration.