Briefly describe the types and basic principles of commonly used analytical methods for health physical and chemical inspection.

1. Hygienic physical and chemical inspection generally includes four steps: sample collection, sample treatment before analysis, sample analysis and test result report. 2. The commonly used analytical methods are sensory examination; Physical analysis methods; Chemical analysis (qualitative analysis, quantitative analysis); Physical and chemical analysis methods (electrochemical methods, chromatography and photochemical analysis).

Physical and chemical examination of hygiene is a subject that uses the basic theories and methods of physical chemistry in the field of preventive medicine, especially the modern instrumental analysis theory and technical means to study the types and quantities of substances closely related to human health. It is a multidisciplinary and applied subject.

The theories, methods and technologies related to the detection of chemical substances in the field of preventive medicine are the research objects of health physical and chemical inspection.

1. At present, under the premise of ensuring the precision and accuracy of the test results, the physical and chemical inspection of health is developing in the direction of miniaturization, rapidity and automation.

2. In recent years, many advanced instrumental analysis methods, such as gas chromatography, high performance liquid chromatography, atomic absorption spectrometry, capillary electrophoresis, ultraviolet-visible spectrophotometry and electrochemical method, have been widely used in health physical and chemical inspection, and instrumental analysis methods have become more and more important in China's health physical and chemical standard inspection methods.

Development trend of health physical and chemical inspection;

3. With the development and popularization of computer technology, the automation of analytical instruments is also one of the important development directions of health physical and chemical inspection.

4. Instrument combination technology plays a very important role in solving the separation and analysis of complex systems in health physical and chemical inspection.

5. Interdisciplinary technology developed in recent years: The fully differential analysis system can realize the overall miniaturization, standardization and automation of chemical reaction, separation and detection.