specific

in analysis
https://doi.org/10.1351/goldbook.S05788
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 @S05550@, meaning that no @I03089@ are supposed to occur.
Source:
PAC, 1983, 55, 553. (Recommendations for the usage of selective, selectivity and related terms in analytical chemistry) on page 555 [Terms] [Paper]