Fabrication and characterization of novel salicylic acid sensors using different reagents (ferric and copper)

Han Chern Loh, Musa Ahmad, Mohd Taib

Research output: Contribution to journalArticle

Abstract

Fabrication of optical fiber salicylic acid (SA) sensors based on immobilization of ferric(III) nitrate and copper(II) acetate on Dowex-50x8 is presented in this paper. The SA forms a stable purple complex with immobilized Fe 3+ at pH 2.1 with a response time of 10 min while it forms a stable yellowish green complex with immobilized Cu 2+ at pH 6.5 with a response time of 8 min. The reflectance spectra of the sensors were measured by using an optical fiber spectrophotometer. The results showed these SA sensors have maximum reflectance at 786 nm and 725 nm for SAFe complex and SACu complex, respectively. The useful dynamic response ranges are 0.02-0.50 g/L (SAFe) and 0.40-1.40 g/L (SACu). These complexes are stable for more than 24 hours. A good reproducibility (0.90% - SAFe; 0.86% - SACu) of measurement was obtained with these sensors.

Original languageEnglish
Pages (from-to)1299-1310
Number of pages12
JournalAnalytical Letters
Volume39
Issue number7
DOIs
Publication statusPublished - Jun 2006

Fingerprint

Salicylic acid
Salicylic Acid
Optical Fibers
Copper
Fabrication
Reaction Time
Sensors
Optical fibers
Immobilization
Spectrophotometers
Dynamic response
Nitrates

Keywords

  • Copper(II) acetate
  • Dowex-50×8
  • Ferric(III) nitrate
  • Optical fiber sensor
  • Salicylic acid

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry, Genetics and Molecular Biology(all)
  • Biochemistry

Cite this

Fabrication and characterization of novel salicylic acid sensors using different reagents (ferric and copper). / Loh, Han Chern; Ahmad, Musa; Taib, Mohd.

In: Analytical Letters, Vol. 39, No. 7, 06.2006, p. 1299-1310.

Research output: Contribution to journalArticle

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