Definition of qualitative analysis in US English:

qualitative analysis

noun

Chemistry
  • Identification of the constituents, e.g. elements or functional groups, present in a substance.

    • ‘A quick, qualitative analysis of valves during SEM work confirmed the presence of pyrite and the calcium phosphate composition of the carapace.’
    • ‘In addition, qualitative analysis of callus indicated that both strains stimulated cell proliferation in the cobiotic cultures.’
    • ‘Despite being unable to perform a meta-analysis, qualitative analysis had to be performed rigorously to ensure a clear, comprehensive, and objective account of the primary studies was given.’
    • ‘These results indicate that the improved extraction method of RNA with benzyl chloride is useful for quantitative and qualitative analysis of RNA in plant tissues such as stiff leaves of rice.’
    • ‘In other trials, qualitative analysis of the ECG data alone or in combination with troponin T levels predicted treatment outcomes.’
    • ‘In the chemical industry, coordination compounds are used in qualitative analysis to separate metal ions, and to identify unknown ions in solution.’
    • ‘On returning, though still an undergraduate, he tutored in qualitative analysis, at which he excelled; and also taught a course for students of home economics.’
    • ‘Selective precipitation was the basis behind the qualitative analysis scheme that was used years ago to identify which ions were present in unknown aqueous solutions.’
    • ‘These tests are basically a form of qualitative analysis, determining the individual molecules that are present.’
    • ‘This method is usable for qualitative analysis of reaction mechanisms mediated by the protein environment.’
    • ‘Rod outer segment length and outer nuclear layer thickness measurements were used to assess light damage, along with qualitative analysis of swelling and disruption of the outer retinal layers.’
    • ‘If a chemist wishes to analyze a sample to find what elements or compounds are present, that is, to identify the elements and compounds present, she or he will choose a qualitative analysis method.’
    • ‘A mixed method approach was utilized in the study to provide triangulation and clarification of results: qualitative analysis and quantitative analysis.’
    • ‘A qualitative analysis identifies the components of a substance or mixture; quantitative analysis measures the amounts or proportions of the components in a reaction or substance.’
    • ‘One of the primary methods of qualitative analysis involves precipitation reactions.’
    • ‘Microchemical tests are a form of qualitative analysis used to identify the nature of a variety of materials including metals, pigments, proteins, plastics, and salts.’
    • ‘Moreover, even though quantitative analysis is less subjective than qualitative analysis, interpretation and bias are by no means eliminated.’
    • ‘We developed genome images to visualize microarray data in a way that would facilitate comprehensive qualitative analysis of one or a few experiments.’
    • ‘At its heart, good qualitative analysis relies on the skill, vision and integrity of the researcher doing that analysis, and as Dingwall et al have pointed out, this requires trained, and, crucially, experienced researchers.’
    • ‘Thus, a single-pass DNA sequence derived from RNA is a reliable source for quantitative and qualitative analysis.’