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 (https://doi.org/10.1351/pac199567101699)