Analyses in which the amount or concentration of an analyte may be determined (estimated)
and expressed as a numerical value in appropriate units.
Qualitative analysis may take place without quantitative analysis, but quantitative analysis requires
the identification (qualification) of the analytes for which numerical estimates are
given.
Source:
PAC, 1995, 67, 1699
(Nomenclature in evaluation of analytical methods including detection and quantification
capabilities (IUPAC Recommendations 1995))
on page 1701