Objective: The aim of this study was to evaluate the pH, buffering capacity (BC), total carbohydrates and sucrose in 15 sugar-free and light processed fruit juices.Material and methods: The pH was determined with a Mettler Toledo 320 pH meter.The BC was determined by titration, adding 0.1...
Understand the basic properties of chloride selective electrode; 2. Grasp the usage of chlorine ion selective electrode; 3. Grasp the principle and operation method of standard addition method to determine chlorine content in water; 4. Learn to measure electromotive force with a pH meter; Two, ...
Determination of pH value by colorimetry PH value The pH value is the negative logarithm of the hydrogen ion activity in the solution When the concentration of H + is small, the concentration of H + can be used to calculate pH instead of activity. PH value is one of the most commonly us...
To shake the samples, a vortex was used, in turn, a thermostat was used to evaporate the organic solvent, and the pH of the solutions was adjusted using a pH-meter from Mettler Toledo (Switzerland). The deionized water used for all experiments was purified using a Millipore Milli‐Q‐RG ...
Use of pH-meter for indicating the end point of various titrations in mixed solvents When the following potentiometric titrations using a glass electrode of pH-meter as an end point indicator were carried out in the presence of polar organic solvent in the aqueous solution, steep changes of ap...
During the study, a Mikro 220R centrifuge with fast cool function (Hettich Zentrifugen, Tuttlingen, Germany), and a FiveEasy F-20 pH-meter (Mettler Toledo, Greifensee, Switzerland) were also used. Water was purified using a Milli-QRG system (Millipore, Vienna, Austria). Stock solutions The ...
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A conventional three electrode system was employed, consisting of a MWCNT modified CPE as a working electrode, a silver/silver chloride (Ag/AgCl/KClsat) (Metrohm, Switzerland) and a Pt wire counter electrode (Azar electrode, Iran). Solution pH values were determined using a 691 pH meter (...
ina liquidsamplelikeαpHmeterisintroducedlayingemphasisonitsconcept,itscon-structionanditsapplication.Basedonthetracedetermina-tionofwaterinmethanolthepropertiesoftheinlinearran-gementareexamined.Finallythepracticaltestoftheinlinephotometerinthechemicalindustryisdescribedusingasexamplethemeasurementofureainwater.1 ...
HANNA pH 211 Micro-processor pHmeter was used for pH measurements. Forced degradation studies were accomplished with the aid of thermostatic controlled water bath (Memmert, Germany). Experimental design analysis including matrix of fractional factorial (FFD) and Box–Behnken (BBD) designs were executed...