< back to main site

Publications

Sensitivities of a standard test method for the determination of the pHe of bioethanol and suggestions for improvement.

Brown, R J C; Keates, A C*; Brewer, P J (2010) Sensitivities of a standard test method for the determination of the pHe of bioethanol and suggestions for improvement. Sensors, 10 (11). pp. 9982-9993.

Full text not available from this repository.

Abstract

An assessment of the sensitivities of the critical parameters in the ASTM D6423 documentary standard method for the measurement of pHe in (bio)ethanol has been undertaken. Repeatability of measurements made using the same glass electrode and reproducibility between different glass electrodes have been identified as the main contributors to the uncertainty of the values produced. Strategies to reduce the uncertainty of the measurement have been identified and tested. Both increasing the time after which the pHe measurement is made following immersion in the sample, and rinsing the glass electrode with ethanol prior to immersion in the sample, have been shown to be effective in reducing the uncertainty of the numerical value produced. However, it is acknowledged that the values produced using these modified approaches may not be directly compared with those obtained using the documentary ASTM method since pHe is defined operationally by the process used to measure it.

Item Type: Article
Subjects: Analytical Science
Analytical Science > Trace Analysis and Electrochemistry
Last Modified: 23 Jul 2018 13:55
URI: http://eprintspublications.npl.co.uk/id/eprint/4805

Actions (login required)

View Item View Item