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...
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...
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, ...
Thus, the equivalence point can be determined either potentiometrically (using a pH meter) or simply with an acid-base indicator. Three nontoxic mediators (phosphate, EDTA, and sulfite) were tested, and optimal conditions for the sharpest pH changes were sought. A combination of phosphate (a ...
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 organi... N Hotta - 《Bunseki Kagaku》 被引量: 6发表: 1972年 Determination of sodium hydroxide in boiler water by a linear titration plot meth...
ina liquidsamplelikeαpHmeterisintroducedlayingemphasisonitsconcept,itscon-structionanditsapplication.Basedonthetracedetermina-tionofwaterinmethanolthepropertiesoftheinlinearran-gementareexamined.Finallythepracticaltestoftheinlinephotometerinthechemicalindustryisdescribedusingasexamplethemeasurementofureainwater.1 ...
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 ...
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...
1. A Perkin-Elmer model 503 electrothermal atomic absorption spectrometer (Waltham, GA, USA) and a pH meter model 691 (Metrohm, Results and discussion As mentioned in the literature, determination of Cr and Ni as essential elements and Pb as a toxic element is necessary. Furthermore, based ...
An on-site immunosensor for ractopamine based on a personal glucose meter and using magnetic β-cyclodextrin-coated nanoparticles for enrichment, and an in... In this work, gold nanoparticals (AuNPs) and CdSe Si,Chen,Jiabin,... - 《Microchimica Acta》 被引量: 4发表: 2015年 加载更多来源...