1. Qualitative analysis: It is one of the communication research methods. It refers to analyzing and studying the attributes of a certain thing from a qualitative aspect through logical reasoning, philosophical thinking, historical verification, legal judgment and other thinking methods. . It is the specific application of traditional humanities research methods in the field of communication.
Quantitative analysis is a method of identifying hazards. It was originally a branch of analytical chemistry, with the main goal of determining the content of each component in a substance. According to the different methods used, it is divided into three categories: gravimetric analysis, volumetric analysis and instrumental analysis.
2. Qualitative analysis: mainly used to study the social structure and function of communication, the social control of communication, the relationship between communication and social development, etc. Human beings' understanding of society and nature first starts from attributes. The fundamental differences of things are also reflected in their qualitative differences. Therefore, qualitative analysis of things is an important method of understanding things.
However, when conducting qualitative analysis of things, it is often easily affected by personal values. Therefore, qualitative analysis should be supplemented by quantitative analysis to draw more accurate, more objective, and more scientific conclusions.
3. Quantitative analysis can be divided into constant analysis, semi-micro analysis, micro analysis, ultra-micro analysis, etc. due to the difference in the amount of analysis sample and the components to be measured.
Later, it was extended to the premise of clearly dividing the types of substances, that is, after the substances are characterized, the strength, stiffness, and range change indicators of the substances are specifically analyzed. Analyzing substances in terms of "quantity" is suitable for analyzing measurement indicators such as the probability, frequency and extent of dangerous losses.
Extended information:
Classification
According to the nature of the analysis method
According to the different nature of the analysis method, it can be divided into chemical analysis method and Instrumental analysis.
Chemical analysis method: It is a method of analyzing substances that relies on specific chemical reactions and their quantitative relationships.
Instrumental analysis method: Instrumental analysis is an important branch of analytical chemistry. This method uses specific instruments to conduct qualitative and quantitative analysis of substances.
According to the sampling volume
According to the sampling amount, it can be divided into constant analysis, semi-micro analysis, micro analysis and ultra-micro analysis.
Constant analysis: refers to the analysis of the amount of the tested sample m>0.1g or V>10ml, and the component content is 1-100%.
Semi-microanalysis: It is a method between constant analysis and microanalysis.
Microanalysis: Generally refers to chemical analysis where the sample weight is 0.1-10mg or the volume is 0.01-1ml.
Ultra-trace analysis: refers to an analysis method in which the sampling mass of the measured substance is less than 1 mg or the sampling volume is less than 0.01 ml.
Reference materials: Baidu Encyclopedia - Qualitative analysis
Reference materials: Baidu Encyclopedia - Quantitative analysis