Next Article in Journal / Special Issue
Direct Electrochemistry of Redox Proteins and Enzymes Promoted by Carbon Nanotubes
Previous Article in Journal / Special Issue
A Study on Tannic Acid-doped Polypyrrole Films on Gold Electrodes for Selective Electrochemical Detection of Dopamine
Article Menu

Export Article

Open AccessArticle
Sensors 2005, 5(4), 209-219; doi:10.3390/s5040209

On Calibration of pH Meters

Department of Chemistry and Department of Physics, University of Missouri-Kansas City, 20045110 Rockhill Road, Kansas City, Missouri 64110 USA
*
Author to whom correspondence should be addressed.
Received: 27 May 2004 / Accepted: 14 November 2004 / Published: 27 April 2005
(This article belongs to the Special Issue Papers presented at I3S2004, Nanjing)
View Full-Text   |   Download PDF [139 KB, uploaded 20 June 2014]   |  

Abstract

The calibration of pH meters including the pH glass electrode, ISE electrodes,buffers, and the general background for calibration are reviewed. Understanding of basicconcepts of pH, pOH, and electrode mechanism is emphasized. New concepts of pH, pOH,as well as critical examination of activity, and activity coefficients are given. Theemergence of new solid state pH electrodes and replacement of the salt bridge with aconducting wire have opened up a new horizon for pH measurements. A pH buffer solutionwith a conducting wire may be used as a stable reference electrode. The misleadingunlimited linear Nernstian slope should be discarded. Calibration curves with 3 nonlinearportions for the entire 0—14 pH range due to the isoelectric point change effect areexplained. The potential measurement with stirring or unstirring and effects by double layer(DL) and triple layer (TL) will be discussed. View Full-Text
Keywords: electrochemistry; electrode; pH measurement electrochemistry; electrode; pH measurement
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Cheng, K.L.; Zhu, D.-M. On Calibration of pH Meters. Sensors 2005, 5, 209-219.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top