Research Institute for Material and Chemical Measurement

Organization > Research Institute for Material and Chemical Measurement  > Research Groups



Research Groups

Inorganic Standards Group

The Inorganic Standards Group develops, maintains, and supplies pH standard solutions, electrolytic conductivity standard solutions, elemental standard solutions, high-purity inorganic standards, and industrial material standards for inorganic analysis, to meet domestic needs. This group appropriate accurately and precisely determines primary standard for inorganic analysis using potential primary methods (e.g., the Harned cell method, coulometric analysis, titrimetric analysis, gravimetric analysis, isotope dilution mass spectrometry, and neutron activation analyses). And this group conducts the application studies associated with them.

Environmental Standards Group

環境標準 Ensuring the analytical reliability in chemical testing is essential for guaranteeing environmental comfort as well as warranting food safety. In order to ensure analytical reliabilities in the field of environmental and food testing, the present group is embarking on the research activities for establishing reliable analytical techniques (RATs), developing matrix-type reference materials based on the RATs, and providing support programs for upgrading technical skills of analysts in testing laboratories.

Gas and Humidity Standards Group


The Gas and Humidity Standards Group develops and supplies various kinds of gas standards metrologically traceable to the International System of Units as well as humidity standards ranging from trace amounts at ppb level of moisture to high humidity at a dew point of 95 °C. For these standards, this group conducts studies on the preparation methods of gas standards based on high-precision mass measurement and high-sensitivity spectroscopy via cavity ring-down spectroscopy (CRDS). This group also develops gas standards for greenhouse and related gases, which are topical issues, in cooperation with other observational institutes in Japan.

Organic Analytical Standards Group


Use of certified reference materials (CRMs) and participation in proficiency testings (PTs) are key elements for ensuring quality control of food, environmental, and industrial product analyses. The Organic Analytical Standards Group develops accurate quantification methods for micro-organic compounds, such as pesticides, polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), and perfluoroalkyl substances (PFASs), and moisture. Based on these methods, we develop and supply highly reliable matrix-type and calibration CRMs for food, environmental, and industrial product analyses. We also organize PTs for residual pesticide analyses.

Organic Primary Standards Group


Most analytical instruments used for the determination of organic compounds such as hazardous components in foods or in the environment lack internal calibration standards, and thus require calibration with reference materials. The Organic Primary Standards Group researches and develops techniques for assessing purity or concentration of organic compounds (e.g., freezing point depression method, quantitative NMR, and titrimetry) that are traceable to the International System of Units. Although we have provided our research results in the form of certified reference materials and of calibration services to the industrial world, etc., such traceable organic reference materials are supplied insufficiently. Therefore, this group aims to establish more efficient development and supply system that can provide reliable standardss promptly and inexpensively.

Bio-medical Standards Group


Measurements of biomolecules in health monitoring, in food analysis, and in pharmaceutical quality controls, are essential for our healthy and comfortable life. Focusing on a variety of biomolecules ranging from low-molecular-weight compounds, such as steroid hormones and amino acids, to biological macromolecules, such as proteins and nucleic acids, the Bio-medical Standards Group develops accurate analytical techniques and certified reference materials to ensure the reliability of bioanalyses and clinical chemical measurements.

Surface and Nano Analysis Research Group

As the advanced nanotechnology has been developing the highly functional materials equipped with thin film structures, multilayered structures, internal nanostructures, and nanostructured surfaces, the measurement and analysis technologies are being expected both to suit these new materials and to improve the precision of nanoscale measurements. The Surface and Nano Analysis Research Group has been focusing on the development of the surface/interface and the nanoscale analysis techniques, with use of the microbeam of X-rays, electron beams, and ion beams. We also have been developing the standard reference materials to calibrate the nanoscale measurement, and supplying the thickness calibration services of nanostructured thin films.

Nanostructured Materials Characterization Research Group

The Nanostructured Materials Characterization Research Group is promoting researches on metrological and practical standards relevant to analysis of surfaces, chemical compositions at a shallow depth, and nanopores of various materials. These standards fulfill immediate needs in nanotech industry, namely, apposite to quality control in the production process as well as R&Ds of innovative materials for semiconductor devices, antireflection coating, molecule selective sensors, and ion separation membranes. So far we developed certified reference materials for characterization of semiconductors and for nano-hole measurement, which are under provision. R&Ds on related analytical techniques (e.g., mass spectrometry, scanning tunneling microscopy, and X-ray analysis) are also under implementation.

Particle Measurement Research Group

The Particle Measurement Research Group researches the measurement of particles and polymers. Particles, powders, and polymeric materials have been widely used in the development of advanced materials, medical services, and general commodities. Some of these particles are found in the environment, for example, in the form of PM2.5. To facilitate accurate and precise measurement of particle properties, including particle size, this group provides standards of particles and polymers, including some at the nanometer scale. In addition, this group develops technologies to measure particle properties with high precision as well as new standard materials and calibration techniques and conducts international standardization activities including contribution to ISO standards.

Thermophysical Property Standards Group


In modern society which requires a great deal of energy consumption, it is important to solve various heat-related problems such as the thermal insulating of buildings for energy saving and the thermal countermeasure of electronic devices. To solve these problems, Thermophysical Properties Standards group develops measurement technologies for thermophysical properties of functional materials and supplies SI-traceable thermophysical property standards and provides a database of thermophysical property data.

Metrological Information Research Group


Our group is composed of four sub-teams of polymer analysis, spectral database, software accreditation, and applied statistics. The polymer analysis team conducts activities such as provision of CRMs of polymer additives. The CRMs are used for controlling the precision of analysis or for confirming the validity of analytical methods or instruments during the analysis of polymer additives in plastics. The spectral database team is compiling and maintaining "Spectral Database for Organic Compounds (SDBS)," and opening it to the public through the internet for free of charge. SDBS has been earning large number of accesses from all over the world. The mission of the software accreditation team is research and development about software evaluation technology in legal metrology. The area ranges from practice to theory: While we develop testing procedures according to software related OIML and JIS documents in legal metrology, we study verification tools in order to prove software correctness. The applied statistics team is researching the evaluation of measurement uncertainty and statistical methods for the interlaboratory comparisons. In addition, this team promotes the utilization of measurement uncertainty through the management of "Uncertainty Club" which is the user's club of measurement uncertainty.

Accurate Crystal Structure Analysis Research Group

For the research and development of innovative and advanced materials, suitable application and control of physical properties originated from the effects at the atomic and molecular scales, further, at the nanometer level have increasingly become important to improve each function. For this purpose, precise structural analysis at the atomic level are indispensable tool in understanding the mechanisms of physical properties. The Accurate Crystal Structure Analysis Research Group develops precise evaluation techniques for the measurement and analysis of X-ray crystal structure determination and solid-state NMR and aims to establish fundamental methodology for the characterization of materials with high reliability.