Analytical chemistry studies and develops theories and techniques for analyzing various chemical systems, which include molecules, molecular assemblies, nanoparticles, materials, and many more. It provides various methods for understanding chemical systems, quantifying the amount of matter, and characterizing structures and functions, which are essential in chemical research. In addition, Analytical chemistry actively searches critical applications of developed analytical techniques to benefit the sustainable lives of humankind. For example, developing emerging materials, such as alternative energy materials, also requires new analytical techniques which enable us to assess their performances. Furthermore, increasing threats of various toxic chemicals, pollutants, and infectious diseases call for developing sensors that allow rapid, accurate, and precise detections of such chemical and biochemical threats.

Micro-sized chemical sensors, biosensors, and small analyzers are actively developed and tested for detecting trace amounts of active chemical substances and environmental pollutants. Recently, analytical techniques utilizing electrochemistry have been actively developed as well. The electrochemical analysis enables to study of chemical systems involving electron movements and therefore plays a crucial role in developing highly effective energy storage and conversion systems. Furthermore, new analytical approaches which combine various spectroscopic and spectrometric methods are also explored to characterize the properties (structures, topologies, functions, etc.) of various atomic and molecular clusters.