Product category:
Liquid Analysis: pH, Conductivity, ISE
News Release from: Metrohm UK | Subject: Aquatrode Plus
Edited by the Processingtalk Editorial
Team on 15 March 2007
Aquatrode Plus - highest level water
analysis
The Aquatrode Plus is a combined pH glass electrode that has been specially designed for pH measurements and pH titrations in poorly conducting samples such as natural surface or deionised water
The Aquatrode Plus guarantees the highest precision in pH measurement and pH titration Specially designed for pH measurements and pH titrations (e.g the determination of the carbonate alkalinity) in ion-deficient, poorly conducting samples such as natural surface waters or deionized water, the Aquatrode Plus is a combined pH glass electrode
This article was originally published on Processingtalk on 23 Jun 2008 at 8.00am (UK)
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pH measurement of ethanol using the Aquatrode Plus
Investigations into the use of the Metrohm Aquatrode Plus electrodes for ethanol pH measurements according to ASTM D 6423 - the pH value is an important quality criterion for bioethanol
It is the pH electrode of choice for a wide range of applications covering not only drinking water analysis but also field measurements, research and training at universities, as well as on-line pH measurements.
The acid capacity of a water sample (KA) is the molar amount of oxonium ions that the water sample can accept before reaching predefined pH values.
It is given in units of mmol/L.
For the acid capacity to pH 8.2 (KA=8.2, previously p value) HCl solution is used to titrate 100 mL sample to pH = 8.2; for the acid capacity to pH 4.3 (KA=4.3 , previously m value) the titration is stopped at pH = 4.3.
This application and many more can be found in the Metrohm Monograph *Practical Titration*, which can be ordered by contacting Gemma Willis at Metrohm. Request a free brochure from Metrohm UK ...
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