Physico-Chemical nanomaterials science

Spectrophotometric control of oxidation-reduction-potential (O.R.P.) spatial pattern in activated water
S.V. Vasylyuk1*, Y. A. Myagchenko1, A. Britan1
1 Faculty of Physics, Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska Street, 01601, Kyiv, Ukraine
Corresponding author email:svitlanafvasylyuk@gmail.com
   One of the characteristics of water containing dissolved molecular hydrogen (such as ionized water) is that it exhibits a negative oxidation-reduction potential (O.R.P.). Chemical reactions occurring in an aqueous solution are called redox reactions. The O.R.P. measures the capacity of a solution to either release or accept electrons from chemical reactions. The design we used as activator is the plastic bag inside with powdered magnesium and some water placed inside. The package sealed and immersed in the test liquid (water). During the interaction of magnesium with water inside the package generated hydrogen that diffuses through the walls outside of the package, then saturating with hydrogen water surrounding the package. As a result O.R.P. of water changes towards negative and can reach sizes "-" 600 mV. The common nowadays O.R.P. measurement method based on the use of a pair of electrodes (measuring and reference electrode). In the case of immersion of electrodes in an environment where change O.R.P., it is defined as the voltage between the electrodes, which are expressed in millivolts. We proposed a method based on spectrophotometric measurement bandwidth of an aqueous solution of a substance, such as potassium permanganate. The most sensitive to changes in the absorption spectrum solution of potassium permanganate due to changes in O.R.P. water area proved its spectrum at 525 nm, which coincides with the green LEDs strip light. For measuring changes in light transmission test solution compared to the control we used the method of differential spectrophotometry made from us compact, stable photometer with LED and silicon photodiode with a large photosensitive surface.