منابع مشابه
Water surface is acidic.
Water autoionization reaction 2H2O --> H3O- + OH- is a textbook process of basic importance, resulting in pH = 7 for pure water. However, pH of pure water surface is shown to be significantly lower, the reduction being caused by proton stabilization at the surface. The evidence presented here includes ab initio and classical molecular dynamics simulations of water slabs with solvated H3O+ and O...
متن کاملAcidic electrolysed water in the disinfection of the ocular surface.
Acidic electrolysed water (AEW) is a colorless solution prepared by the electrolysis of sodium chloride solution, which has potent anti-microbial activity against a wide variety of bacteria, fungi and virus. In this study, the safety and efficacy of an isotonic AEW solution (iAEW) was investigated both in vitro and in vivo using denuded corneas of guinea pigs. Povidone iodine (0.01-1.0%) was us...
متن کاملIs the liquid water surface basic or acidic? Macroscopic vs. molecular-scale investigations
0009-2614/$ see front matter 2008 Elsevier B.V. A doi:10.1016/j.cplett.2008.04.010 * Corresponding author. E-mail address: [email protected] (R.J. Saykal 1 Present address: Department of Chemistry, Massa ogy, Cambridge, MA 02139, United States. Many physical phenomena are affected by the intrinsic acidity/basicity of the free liquid water surface, yet it remains an active and controversial ...
متن کاملAutoionization at the surface of neat water: is the top layer pH neutral, basic, or acidic?
Autoionization of water which gives rise to its pH is one of the key properties of aqueous systems. Surfaces of water and aqueous electrolyte solutions are traditionally viewed as devoid of inorganic ions; however, recent molecular simulations and spectroscopic experiments show the presence of certain ions including hydronium in the topmost layer. This raises the question of what is the pH (def...
متن کاملDetermination of acidic herbicides in surface water by solid-phase extraction followed by capillary zone electrophoresis.
A rapid solid-phase extraction-capillary zone electrophoresis (CZE) method for determining 2,4-dichlorophenoxyacetic acid, 4-(2,4-dichlorophenoxy) butyric acid, and 2,4,5-trichlorophenoxyacetic acid in real water samples is described. Factors affecting the recoveries and detection of the targets are investigated. With samples being acidified to pH 2 and salted by sodium sulfate to 2% (w/w), an ...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2007
ISSN: 0027-8424
DOI: 10.1073/pnas.0611285104