Ensuring the analytical reliability in chemical testing is essential for guaranteeing quality of materials, environmental comfort as well as warranting food safety. In order to ensure the analytical reliabilities in the field of inorganic materials as well as environmental and food testing, the present group is embarking on the development of new analytical techniques for inorganic analysis, and also developing, sustaining and supplying high purity reference materials including for electrolytic conductivity as well as matrix-type ones for trace element analysis.