calibration function

Also contains definition of: calibration curve

in analysis
The functional (not statistical) relationship for the chemical measurement process, relating the expected value of the observed (gross) signal or response variableE y to the analyte amount x. The corresponding graphical display for a single analyte is referred to as the calibration curve. When extended to additional variables or analytes which occur in multicomponent analysis, the 'curve' becomes a calibration surface or hypersurface.
PAC, 1995, 67, 1699 (Nomenclature in evaluation of analytical methods including detection and quantification capabilities (IUPAC Recommendations 1995)) on page 1703
See also:
PAC, 1990, 62, 2167 (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2177