What are qualitative analysis and quantitative analysis?

Qualitative analysis: it is one of the research methods of communication, which means to analyze and study the attributes of things from a qualitative perspective through logical reasoning, philosophical thinking, historical verification and legal judgment. It is the concrete application of traditional humanities research methods in the field of communication.

Quantitative analysis is a method to identify hazards. Initially, it was a branch of analytical chemistry, and its main goal was to determine the content of each component in a substance. According to the different methods used, it can be divided into three categories: gravimetric analysis, volumetric analysis and instrumental analysis.

Qualitative analysis is mainly used to study the social structure and function of communication, social control of communication and the relationship between communication and social development. Human's understanding of society and nature begins with attributes, and the fundamental differences of things are also manifested in their qualitative differences. Therefore, the qualitative analysis of things is an important way to understand things. But when analyzing things qualitatively, they are often easily influenced by personal values. Therefore, qualitative analysis should be supplemented by quantitative analysis in order to draw more accurate, objective and scientific conclusions.

Quantitative analysis can be divided into constant analysis, semi-micro analysis, micro analysis and ultra-micro analysis. This is due to the difference in the number of samples to be analyzed and the components to be measured. Later, it was extended to the concrete analysis of the strength, stiffness and range change indexes of materials on the premise of clearly dividing the types of materials, that is, after characterizing the materials. Analyzing substances from the perspective of "quantity" is suitable for analyzing the probability, frequency and degree of dangerous loss.

Extended data:

Qualitative analysis can be divided into dry analysis and wet analysis. The samples used in the former do not need to be made into solutions, such as molten bead analysis, flame color analysis, atomic emission spectrometry and X-ray fluorescence spectrometry. In wet analysis, samples should be prepared into solutions, and commonly used solvents are water, acid and alkali solutions. Samples insoluble in the above solvents can be melted and decomposed by using fluxes such as sodium carbonate, sodium peroxide and potassium sulfate, and then dissolved in water or dilute acid. Dry analysis only uses a small amount of reagents and instruments, which is convenient for field mineral identification. ?

The theoretical cornerstone of quantitative analysis is positivism. From the logical process of research, quantitative analysis is close to the research of hypothesis-deduction method, which not only retains the characteristics of attaching importance to observation experiments and collecting empirical data, but also attaches importance to deductive reasoning of logical thinking. The application of hypothesis combines observation experiment and mathematical deduction. Because of this, quantitative analysis often emphasizes the objectivity and observability of physical objects, the interrelationship and causality between phenomena and variables, and requires researchers to strive for objectivity and ethical neutrality in their research.

Reference link: Baidu Encyclopedia-Qualitative Analysis

Baidu Encyclopedia-Quantitative Analysis