Talk:Ethylene glycol (data page)

The value of the dielectric constant, εr[edit]

What is the source of the dielectric constant value, εr? I think the cited value (37.4) is outdated. A newer reference books and scientific papers give some different values. According to [1], εr=40.25 at T=25 C. Several articles [2-6] provides values of permittivity at different temperatures in the range 20-30 C, and all of these are agree with the 40.25 (maximum deviation is about 0.5). So I propose to update the value of εr according to the modern reference book [1]. May I do the corresponding change? Hypercubist (talk) 09:34, 9 August 2010 (UTC)[reply]

References:

[1] David R. Lide, ed., CRC Handbook of Chemistry and Physics, Internet Version 2007, (87th Edition), <http:/www.hbcpnetbase.com>, Taylor and Francis, Boca Raton, FL, 2007

[2] Fulvio Corradini, Massimo Malagoli, Luigi Marcheselli, Andrea Marchetti, Lorenzo Tassi, and Giuseppe Tosi. Dielectric Properties of Ethane-1,2-diol + 2-Methoxyethanol + Water Liquid Ternary Mixtures // Journal of Chemical and Engineering Data, Vol. 38, No. 4, 1993, p. 565-568

[3] BP Jordan, RJ Sheppardt and S Szwarnowskit. The dielectric properties of formamide, ethanediol and methanol // J. Phys. D: Appl. Phys., Vol. 11, 1978. Printed in Great Britain. 1978, p. 695-701.

[4] Bo Gestblom, Ahmed El-Samahy, and Johan Sjoeblom. Dielectric Relaxation Studies of Monoalcohol Solutions with 1,2-Diols // Journal of Solution Chemistry, I/ol. 14, No. 6, 1985, p. 375-392.

[5] Yasuhiro Uosaki, Sunao Kitaura, and Takashi Moriyoshi. Static Relative Permittivities of Water + Ethane-1,2-diol and Water + Propane-1,2,3-triol under Pressures up to 300 MPa at 298.15 K // Journal of Chemical and Engineering Data, Vol. 51, No. 2, 2006, p. 423-429.

[6] C Gabriel and A Peyman. Dielectric measurement: error analysis and assessment of uncertainty. // Phys. Med. Biol. 51 (2006) 6033–6046