matrix effect
- (in analytical chemistry)
The combined effect of all components of the sample other than the analyte on the
measurement of the quantity. If a specific component can be identified as causing
an effect then this is referred to as interference.
Source:
PAC, 1989, 61, 1657
(Nomenclature for automated and mechanised analysis (Recommendations 1989))
on page 1660
- (in surface analysis)
Effects which cause changes in Auger-electron, photoelectron, secondary ion yield,
or scattered ion intensity, the energy or shape of the signal of an element in any
environment as compared to these quantities in a pure element. (a) Chemical matrix
effects: changes in the chemical composition of the solid which affect the signals
as described above. (b) Physical matrix effects: topographical and/or crystalline
properties which affect the signal as described above.
Source:
PAC, 1979, 51, 2243
(General aspects of trace analytical methods - IV. Recommendations for nomenclature,
standard procedures and reporting of experimental data for surface analysis techniques)
on page 2247