Free Standard AU & NZ Shipping For All Book Orders Over $80!
Register      Login
Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE

Investigation of the Range of a Plastic pH Sensor Based on a Dibasic Ionophore

TJ Cardwell, RW Cattrall, LW Deady and KA Murphy

Australian Journal of Chemistry 45(2) 435 - 438
Published: 1992

Abstract

A study is reported of the use of a neutral carrier reagent containing two nitrogen atoms with very different basicities in a pH-sensitive membrane electrode with a view to obtaining a broad response range. This electrode responds well in the pH region of 6-12 but suffers anion interference in the region of pH 2-6. A study is included of the effect of adding various amounts of potassium tetrakis(4-chloropheny1)borate as an anion suppressing reagent to the membrane in order to reduce the anion interference at low pH values. The conclusion is drawn that an extension to the working pH range is not possible with this approach unless controlled amounts of anion suppressing reagent can be provided to approximately balance the positive charge of the carrier in each region of the pH scale.

https://doi.org/10.1071/CH9920435

© CSIRO 1992

Committee on Publication Ethics


Export Citation Get Permission

View Dimensions