Design of Hydrogen Ion Concentration Measurement System
نویسندگان
چکیده
This paper presents an application for measuring the concentration of hydrogen ion by using ion selective electrodes. By this research we hope to provide useful information and verify the feasibility of measuring the concentration of other ions in the same way for sensing sweat. In this research, a pH electrode is used to generate an electrical potential which reflects the concentration of hydrogen ion. A voltage shift circuit is implemented to shift the negative voltage to positive voltage so that it can be inputted to the Analog to Digital Converter of an Arduino microcontroller. By programming the microcontroller, the calibration of pH electrode can be done. The effect of temperature on the electrode can be corrected digitally. An LCD display is used to show the pH value of the testing solution. According to the testing results, when the pH values vary from 3 to 11, the range of electrode output voltage was changes from -236mV to +236mV. After shifted by the voltage shift circuit, the output voltages range from 0.764V to 1.236V.
منابع مشابه
Adsorption of Cr(III) and Mg(II) from Hydrogen Peroxide Aqueous Solution by Amberlite IR-120 Synthetic Resin
In concentration of hydrogen peroxide, first, the solution should be quite pure, and then, it concentrate with methods such as vacuum distillation and cooling crystallization, because impurities in the hydrogen peroxide solution in high concentrations are causing decomposition of this substance; that is very dangerous. The purpose of this article is separation of chromium and magne...
متن کاملDESIGN OF A SIMPLE LASER SYSTEM FOR NEPHELOMETRIC DETERMINATION OF ANIONS
A simple analytical system suitable for nephelometric measurements is introduced in this article. The electronic and optical components are simplified so that the apparatus is easily assembled from materials that are generally available. This instrument is designed for the efficient measurement of anions, and microgram quantities of ions may be determined by a convenient method of titration...
متن کاملDesign of Measurement Interface and System for Ion Sensors
A measurement system was successfully fabricated to detect ion concentrations (hydrogen and chlorine) in this study. PIC18F4520, the microcontroller was used as the control unit in the measurement system. The measurement system was practically used to sense the H and Cl in different examples, and the pH and pCl values were exhibited on real-time LCD display promptly. In the study, the measureme...
متن کاملReducing the effect of salinity and lead on garlic (Allium sativum) seedling roots by improving oxidant defence under selenium and hydrogen sulfide
Selenium and hydrogen sulfide can alleviate the adverse effects of oxidative stress on plants by improving the oxidative defense system. In order to improve the oxidative defense system of garlic under lead and salinity stress by selenium and hydrogen sulfide, a factorial experiment was carried out using selenium and hydrogen sulfide in a completely randomized design with three replications. Ex...
متن کامل