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The current status and future needs of nanoparticle metrology are discussed, particularly with respect to measurements of size, size distribution and number concentration of airborne and liquid-borne nanoparticles. Possible classification of types of measurement standards is proposed, and the role of each type of standard, including the feasibility of its establishment, is examined. A desirable interplay between measurement standards and documentary standards in establishing the traceability chain in particle measurements is suggested. Particle-related calibration services currently provided by our laboratory at the National Institute of Advanced Industrial Science and Technology are also described.
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Ehara et al. (2010) studied this question.
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