pHe is a significant parameter for decreasing the risk of failing motors. It indicates the acid strength of ethanol and alcohol fuels. Determination of pHe of a denatured blend of ethanol utilizing a 913 pH meter as per ASTM D6423 is explained in this application note.
Denatured ethanol fuel
No sample preparation is necessary, if necessary cool or heat it to 22 °C ± 2 °C using a thermostat.
|913 pH Meter, laboratory version
|EtOH-Trode, inner and bridge electrolyte c(KCl) = 3 mol/L
|Temperature sensor Pt1000
|External magnetic stirring plate (e.g. IKA color squid white)
Analysis of Samples
A 60 mL sample is measured and taken in a 100 mL beaker. After being placed on an external stirring plate, electrodes are immersed, and estimation is started immediately. The reading on pH meter after 30 seconds is deemed to be the acid strength of sample.
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