By formalizing the logic of qualitative analysis, QCA makes it possible to bring the logic and empirical intensity of qualitative approaches to studies that embrace more than a handful of cases -- research situations that normally call for the use of variable-oriented, quantitative methods. Boolean methods of logical comparison represent each case as a combination of causal and outcome conditions.
Qualitative vs Quantitative Research Methods: What's The Difference? | Typeform
These combinations can be compared with each other and then logically simplified through a bottom-up process of paired comparison. Computer algorithms developed by electrical engineers in the s provide techniques for simplifying this type of data. The data matrix is reformulated as a "truth table" and reduced in a way that parallels the minimization of switching circuits see Charles Ragin, The Comparative Method: Moving Beyond Qualitative and Quantitative Strategies.
These minimization procedures mimic case-oriented comparative methods but accomplish the most cognitively demanding task -- making multiple comparisons of configurations -- through computer algorithms.
A Simple Guide to Qualitative and Quantitative Research
The goal of the logical minimization is to represent -- in a shorthand manner -- the information in the truth table regarding the different combinations of conditions that produce a specific outcome. A typical analytical scheme for the separation of the cations into groups is summarized in the table. The analysis for anions is more difficult and less systematic than that for cations. The organic nature of a compound is generally indicated by its behaviour on being heated in air; solids usually melt, then burn with either a smoky or nonsmoky flame, in some instances leaving a black residue of carbon.
The elements usually present in these compounds are carbon, hydrogen, oxygen, nitrogen, sulfur, and, occasionally, phosphorus, halogens, and some metals.
Specific tests are available for each of the individual elements. Qualitative chemical analysis.
- 4 simple steps To Do Qualitative Analysis.
- Step 1: Gather your feedback?
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- General Qualitative References?
- Case Studies.
- Venices (Pushkin Collection).
- What Is Qualitative Analysis?.
See Article History. Read More on This Topic. Classical qualitative analysis is performed by adding one or a series of chemical reagents to the analyte.
By observing the chemical reactions…. Learn More in these related Britannica articles:. By observing the chemical reactions and their products, one can deduce the identity of the analyte.
What’s the difference between quantitative research and qualitative research?
The added reagents are chosen so that they selectively react…. Measurement of the actual amount of a certain substance in a compound or mixture is termed quantitative analysis. Quantitative analytic measurement has determined, for instance, that iron makes up Under proper conditions the constant limiting current is governed by the rates of diffusion of the reducible substance up to the surface of the mercury drops, and its magnitude constitutes a measure of the concentration of the reducible substance quantitative analysis.