Mark Ballico 1999 Meas. Sci. Technol. 10 L33 doi:10.1088/0957-0233/10/7/101
Mark Ballico
Show affiliationsSealed glass ampoules made for the realization of the triple point of water as a thermometric reference point, 0.01 °C, must be filled with water of the highest possible purity. This paper discusses a simple electrical technique for measurement of the conductivity of high-purity water within such cells, and presents calculations of the calibration factor in this geometry. The technique is then applied to a large set of cells, some dating back up to 40 years, and the results are compared with measurements of the cells' triple point temperature. The measurements indicate that the effective ionic conductivity of the impurities in the cells is as low as 2 mS m2 mol-1.
Issue 7 (July 1999)
Received 15 April 1999, accepted for publication 2 June 1999, in final form 24 May 1999
Mark Ballico 1999 Meas. Sci. Technol. 10 L33
Jernej F. Kamenik and Miha Nemevšek JHEP11(2009)023
Jacek Dziarmaga et al 2003 J. Phys. B: At. Mol. Opt. Phys. 36 1217
R C King and A H A Al-Qubanchi 1981 J. Phys. A: Math. Gen. 14 51
Alexei Kharine et al 2003 Phys. Med. Biol. 48 357
Zhe Sun et al 2009 New J. Phys. 11 113005
Shaoze Yan et al 2006 Smart Mater. Struct. 15 N7
Guoqiang Li et al 2006 Semicond. Sci. Technol. 21 1026
S Erenburg et al 2009 J. Phys.: Conf. Ser. 190 012121
Imre Ferenc Barna et al 2005 J. Phys. B: At. Mol. Opt. Phys. 38 1001