1. (qualitative): The extent to which other substances interfere with the determination of a substance according to a given procedure.
  2. (quantitative): A term used in conjunction with another substantive (e.g. constant, coefficient, index, factor, number) for the quantitative characterization of interferences.
PAC, 1983, 55, 553. 'Recommendations for the usage of selective, selectivity and related terms in analytical chemistry' on page 555 (
See also:
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2174 [Terms] [Paper]