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Introduction of Qualitative chemical analysis:

Qualitative chemical analysis is a division of chemistry that handles the determination of elements or grouping of elements present in a sample. The techniques used in qualitative analysis changes in complexity, depending on the nature of sample. In few cases it is essential only to confirm the presence of particular elements or groups for which specific tests applied directly to the sample (e.g., flame tests, spot tests) may be available. Commonly sample is a complex mixture and a methodical analysis should be made so that all the constituents may be determined. It is the customary to categorize the methods into two classes: qualitative organic analysis and qualitative inorganic analysis.

Subcategories

Qualitative research: Qualitative research is a technique of inquiry employed in various different academic disciplines, usually in the social sciences but in market research and further contexts as well.  Qualitative researchers plan to collect the in-depth understanding of human behaviour and the reasons that rule such type of behaviour. The qualitative technique finds why and how of decision making, not just what, where, when. Thus smaller but focused samples are more frequently required than large samples.

In the conservative view, qualitative techniques produce information only on some particular cases studied and more common conclusions are only propositions. The Quantitative techniques can then be utilized to seek empirical support for such type of research hypotheses. This opinion has been disputed by the Oxford University professor Bent Flyvbjerg, who argues that the qualitative techniques and case study research both may be used for hypotheses-testing and for generalizing beyond the few cases studied.

Qualitative inorganic analysis: Classical qualitative inorganic analysis is a technique of analytical chemistry which seeks to determine elemental composition of inorganic compounds. Chiefly it is focused on finding ions in an aqueous solution, so that the materials in different forms might require to be brought into this state before utilizing standard techniques. The solution is then treated with various reagents to test for reactions features of particular ions, which may cause color change, solid forming, and various visible changes.

Qualitative inorganic analysis is the method of analytical chemistry which seeks to set up elemental composition of inorganic compounds by a variety of reagents.

Analytical chemistry: Analytical chemistry is the study of the recognition, separation and quantification of the chemical components of natural and artificial substances. Qualitative analysis provides the indication of finding of the chemical species in the sample and quantitative analysis finds out the amount of one or more of these components. Separation of constituents is often done prior to analysis.

Analytical methods can be divided into classical and instrumental. Classical methods (also called as wet chemistry techniques) use separations like extraction, distillation and precipitation and qualitative analysis through color, or melting point. Quantitative analysis is attained by measurement of volume or weight. The Instrumental techniques use an apparatus to calculate physical quantities of the analyte like fluorescence, light absorption, or conductivity. Separation of materials is attained by using electrophoresis or Field Flow Fractionation techniques.

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