Ion-selective electrodes in organic analysis: Determination of amides via hydrolysis to carboxylates

Wing Hong CHAN*, Albert W M LEE, Po Lin Tong, Kwok Yin Tsang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

An indirect ion-selective electrode system for the determination of aromatic amides has been developed. In the presence of an excess of sodium peroxide, both primary and secondary amides were converted quantitatively into the corresponding carboxylates. Subsequently, the carboxylates obtained were determined, without further purification, using a tetraheptylammonium benzoate-poly(vinyl chloride) matrix membrane electrode. The electrode exhibited a Nernstian response in the concentration range 1 × 10-1-7 × 10-3 mol dm-3 benzoate with an average slope of -47.2 mV per concentration decade. It has a working pH range of 7.0-9.5, a rapid response time (less than 3 min) and a stable response for at least 2 months.

Original languageEnglish
Pages (from-to)245-247
Number of pages3
JournalThe Analyst
Volume116
Issue number3
DOIs
Publication statusPublished - 1991

Scopus Subject Areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy
  • Electrochemistry

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