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GCSE Chemistry · key term
A graph relating a measured signal to known concentrations, used to find the concentration of an unknown sample.
Used by AQA and OCR
Specification 4.8.3.7 · Paper 2
Revise: Flame Emission SpectroscopyTo turn an intensity into a concentration, compare the unknown with measurements from solutions of that ion whose concentrations are known. These standards can be shown in a table or used to make a calibration graph.
Specification CM4.2i · Paper 2 (Foundation), Paper 4 (Higher)
A graph made using samples of known concentration, used to estimate the concentration of an unknown sample from a measured signal.
Only read a concentration from a calibration graph when its axes and the relevant measured intensity are given.
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