Possible time-dependent effect of ions and hydrophilic surfaces on the electrical conductivity of aqueous solutions

Verdel, Nada (avtor), Jerman, Igor (avtor), Krašovec, Rok (avtor), Bukovec, Peter (avtor), Zupančič, Marija (avtor)

The purpose of this work was to determine the influence of mechanical and electrical treatment on the electrical conductivity of aqueous solutions. Solutions were treated mechanically by iteration of two steps: 1:100 dilution and vigorous shaking. These two processes were repeated until extremely dilute solutions were obtained. For electrical treatment the solutions were exposed to strong electrical impulses. Effects of mechanical (as well as electrical) treatment could not be demonstrated using electrical conductivity measurements. However, significantly higher conductivity than those of the freshly prepared chemically analogous solutions was found in all aged solutions except for those samples stored frozen. The results surprisingly resemble a previously observed weak gel-like behavior in water stored in closed flasks. We suggest that ions and contact with hydrophilic glass surfaces could be the determinative conditions for the occurrence of this phenomenon.

• Jezik: Angleški jezik
• Ključne besede: autothixotropy, conductivity, exclusion zone, extremely dilute solutions, water
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2012
• Št. strani: Str. 4048-4068
• Številčenje: Vol. 13, iss. 4
• PID: 20.500.12556/RUL-129519
• UDK: 546.212:544.35:544.022.822
• ISSN pri članku: 1661-6596
• DOI: 10.3390/ijms13044048
• COBISS.SI-ID: 35901957
• Datum objave v RUL: 03.09.2021

Gradivo je del revije

• Naslov: International journal of molecular sciences
• Skrajšan naslov: Int. j. mol. sci.
• Založnik: MDPI
• ISSN: 1661-6596
• COBISS.SI-ID: 36217605

Licence

• Licenca: CC BY 3.0, Creative Commons Priznanje avtorstva 3.0 Nedoločena
• Povezava: https://creativecommons.org/licenses/by/3.0/deed.sl
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• Začetek licenciranja: 01.04.2012

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: anorganska kemija, fizikalna kemija, molekule, voda, struktura, vodne raztopine, tekočine, električna prevodnost, hidrofobnost, hidrofobne površine, avtotiksotropija, zelo razredčene raztopine, šibki geli, ioni

Projekti

• Financer: EC - European Commission
• Program financ.: European Social Fund