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.
Sample
Denatured ethanol fuel
Sample Preparation
No sample preparation is necessary, if necessary cool or heat it to 22 °C ± 2 °C using a thermostat.
Configuration
| . |
. |
| 913 pH Meter, laboratory version |
2.913.0210 |
| tiBase 1.1 |
6.6063.112 |
| EtOH-Trode, inner and bridge electrolyte c(KCl) = 3 mol/L |
6.0269.100 |
| Temperature sensor Pt1000 |
6.1110.100 |
| External magnetic stirring plate (e.g. IKA color squid white) |
IKA 0003671000 |
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.
Parameters
| . |
. |
| pHe (n=10) |
s rel (%) |
| 8.08 |
0.45 |
About Metrohm
At Metrohm is one of the world’s most trusted manufacturers of high-precision instruments for chemical analysis. Metrohm was founded in 1943 by engineer Bertold Suhner in Herisau, Switzerland. Today, Metrohm is represented in 120 countries by subsidiaries and exclusive distributors. The global Metrohm Group also includes the Dutch companies Metrohm Applikon and Metrohm Autolab, manufacturers of online analyzers and instruments for electrochemical research, respectively. Recently, the Metrohm Group was joined by Metrohm Raman, a leading manufacturer of handheld Raman spectrometers.
Metrohm is the global market leader in analytical instruments for titration. Instruments for ion chromatography, voltammetry, conductivity, and stability measurement make the Metrohm portfolio for ion analysis complete. Instruments for Near-infrared and Raman spectroscopy are another, strongly growing segment of the Metrohm portfolio.
Metrohm is a problem solver, both in the laboratory and within the industrial process. To this end, the company offers their customers complete solutions, including dedicated analytical instrumentation as well as comprehensive application know-how. More than 30% of the company’s employees at the Metrohm international headquarters in Herisau work in R&D.
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