New approach to calibrating conductivity meters in the low conductivity range |
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Authors: | Petra Spitzer Bruno Rossi Yves Gaignet Stéphane Mabic Uwe Sudmeier |
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Institution: | (1) Physikalisch-Technische Bundesanstalt, Metrology in Chemistry, Bundesallee 100, 38116 Braunschweig, Germany;(2) Lab Water Division, Millipore, St Quentin-Yvelines, France |
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Abstract: | There is currently a major issue with the calibration of conductivity meters used for high purity water: the lack of availability of a reference material or reference methods for low conductivity ranges (conductivity below 1 S cm–1 at 25.0 °C, resistivity >1 M cm at 25.0 °C). This paper describes the current status of conductivity measurements in high purity water. A new and improved approach, currently being investigated, should allow us to make the calibration of conductivity meters used for low conductivity ranges traceable to the SI.Milipore, Milli-Q and Elix are registered trademarks of Millipore Corporation. |
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Keywords: | Electrolytic conductivity High purity water Calibration Primary methods Metrology in chemistry |
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