Periodization of the history of chemical analysis and analytical chemistry as a branch of science

In the periodization of the history of chemical analysis, it seems advisable to take into account changes in the priority problems and objects and methods of analysis and in the periodization of analytical chemistry as a science, changes in the substance matter and the level of scientific research, and also in the place of analytical chemistry in the system of sciences. Both periodizations are closely related, and the borders between the periods approximately coincide. This allows one to use a united periodization for educational purposes.