ResourceGeneral Lab
pH Measurement of Pure Water: Performance of Specialist Sensors
11 Mar 2019The measurement of pH in pure water samples is critical due to its low conductivity, fluctuations in liquid junction potential of electrode, and also lack of sensitivity of glass membrane. Pure water can be defined as water samples with a conductivity of less than 100 µS/cm. These pure water samples are low in both hydrogen ions and conducting ions. Low ionic concentration of the sample deters a stable liquid junction potential in the pH electrode system. Using specialist laboratory pH sensors from METTLER TOLEDO eases pH measurement in such low ionic water samples. The following study is a technical approach to measure pH in low ionic water samples using pH sensors of various types including specialist sensors.
Links
Tags
pH Meters and ElectrodesIon and pH meters are electrochemical equipment used to measure the pH (acidity or alkalinity) or specific ion concentration of a solution. Other meters can also measure the conductivity or dissolved oxygen content of a solution. pH meters, specific ion meters, conductivity meters and dissolved oxygen meters can come as benchtop or portable equipment. A meter’s electrodes can be replaced with easy to clean electrodes or electrodes for difficult media. pH, ion and conductivity meters are typically used in life science research, pharmaceutical testing, food and beverage, environmental and water analysis. Find the best pH meters and electrodes in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.pH and Conductivity MetersIon and pH meters, used for electrochemical techniques and measurements, measure the concentration of specific ions using electrodes (probes) and a meter. Features of ph and ion meters to consider include temperature compensation, auto-calibration, adjustable resolution, measurable range and accuracy. Meters can be handheld, portable, benchtop and modular.CalibrationpH Measurement