in analysis
A term which expresses qualitatively the extent to which other substances interfere with the determination of a substance according to a given procedure. Specific is considered to be the ultimate of selective, meaning that no interferences are supposed to occur.
PAC, 1983, 55, 553. 'Recommendations for the usage of selective, selectivity and related terms in analytical chemistry' on page 555 (https://doi.org/10.1351/pac198855030553)