Condosity

Condosity is a comparative measurement of electrical conductivity of a solution.

The condosity of any given solution is defined as the molar concentration of a sodium chloride (NaCl) solution that has the same specific electrical conductance as the solution under test.^[1][2][3]

By way of example, for a 2 Molar potassium chloride (KCl) solution, the condosity would be expected to be somewhat greater than 2.0. This is because potassium is a better conductor than sodium.

Applications

The measurement is sometimes used in biological systems to provide an assessment of the properties of bodily or cellular liquids,^[4][3][5] or the properties of solutes in the physical environment.^[6] When measuring the properties of bodily fluids such as urine, condosity is expressed in units of millimoles per litre (mM/L).^[7][8]

References

1. Weast, Robert C. (1982). CRC Handbook of Chemistry and Physics: A Ready-reference Book of Chemical and Physical Data. CRC Press. p. 2082. ISBN 9780849304637.
2. Wolf, Arnold Veryl (1966). Aqueous solutions and body fluids: their concentrative properties and conversion tables. Hoeber Medical Division, Harper & Row. pp. 17–28.
3. A Slomowitz, Larry; Deng, Aihua; S Hammes, John; Gabbai, Francis; C Thomson, Scott (2002-05-01). "Glomerulotubular balance, dietary protein, and the renal response to glycine in diabetic rats". American Journal of Physiology. Regulatory, Integrative and Comparative Physiology. 282 (4): R1096–103. doi:10.1152/ajpregu.00610.2001. PMID 11893614. S2CID 13630228.
4. Hume, Ian D. (1999-05-27). Marsupial Nutrition. Cambridge University Press. p. 289. ISBN 9780521595551.
5. N.Y.), Society for Experimental Biology and Medicine (New York (1967). Proceedings of the Society for Experimental Biology and Medicine. p. 938.
6. Marañon, T.; García, L. V.; Troncoso, A. (1989-10-01). "Salinity and germination of annual Melilotus from the Guadalquivir delta (SW Spain)". Plant and Soil. 119 (2): 223–228. doi:10.1007/BF02370412. hdl:10261/11766. ISSN 0032-079X. S2CID 39027165.
7. Wolf, A.V.; Pillay, V.K.G (June 1969). "Renal Concentration Tests: Osmotic Pressure, Specific Gravity, Refraction and Electrical Conductivity Compared". The American Journal of Medicine. 46 (6): 838–839. doi:10.1016/0002-9343(69)90085-0. PMID 5797912. Retrieved 1 January 2018.
8. Wolf, Arnold Veryl (1966). "Electrical Conductivity: Specific Conductance, Condosity and Relative Salinity". Aqueous solutions and body fluids: their concentrative properties and conversion tables. New York: Hoeber Medical Division, Harper & Row. pp. 19–26.