New Japanese certified reference materials for electrolytic conductivity measurements
Accreditation and Quality Assurance(2017)
摘要
The National Metrology Institute of Japan (NMIJ) has established three certified reference materials (CRMs) in electrolytic conductivity with a primary Jones-type cell: aqueous solutions of potassium chloride with different molalities (1 mol kg −1 , 0.1 mol kg −1 and 0.01 mol kg −1 ) all supplied in glass bottles. The uncertainties were estimated from standard uncertainties of measurements (impedance, temperature and integrity of cell geometry), measurement’s repeatability, homogeneity of a batch and the storage stability of solutions. The storage stability of candidate NMIJ CRMs of upper and lower concentrations was examined with a secondary cell.
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关键词
Electrolytic conductivity,Jones-type cell,Potassium chloride,Electrochemical impedance spectroscopy,Certified reference material
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