Theoretical physics to analytics

This paper is based on the author’s lecture at the Congress of Russian Analysts in April 2010. Attention is paid to the natural advance in the old trend towards the introduction of the achievements of experimental physics into the practice of analytical chemistry. As a result, many things originally appeared in the closed world of physical laboratories have came to the wide expanse of instrumental analytics. Now the collaboration of physics with analytical chemists is going to the next level, practical needs in the determination of compounds rather than elements as result in the sophistication of the facilities for the processing of experimental data, which in turn calls for the use of not only new experimental methods but also many branches of theoretical physics for solving analytical problems. This problem is considered on several examples demonstrating important applied results.