Development of a flow-through optosensor for determination of Co(II)

Nor Azah Yusof, Musa Ahmad

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A flow-through optical fibre chemical sensor for the determination of Co(II) at trace level using immobilised 2-(4-pyridylazo)resorcinol (PAR) as the reagent phase is proposed. PAR is physically adsorbed onto XAD-7. This method provided a great sensitivity and simplicity with wide linear response range from 1 × 10-2 to 1 × 103 ppm and detection limit of 20 ppb. This method also showed a reproducible result with relative standard deviation (R.S.D.) of 1.78% and response time of ∼5 min. The response towards Co(II) was also reversible using acidified KCl as the regenerating solution. Interference studies showed that Cr(III) significantly interfered during the determination. Excellent agreement with reference to inductively coupled plasma optical emission spectroscopy (ICPOES) method was achieved when the developed sensor was applied for determination of Co(II) in aqueous samples.

Original languageEnglish
Pages (from-to)413-418
Number of pages6
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume69
Issue number2
DOIs
Publication statusPublished - Feb 2008

Fingerprint

Fiber optic chemical sensors
Optical emission spectroscopy
Inductively coupled plasma
Sensors
sensors
optical emission spectroscopy
reagents
standard deviation
optical fibers
interference
sensitivity
4-(2-pyridylazo)resorcinol
resorcinol
amberlite XAD 7

Keywords

  • Co(II) detection
  • Flow injection analysis (FIA)
  • Optical fibre sensor

ASJC Scopus subject areas

  • Spectroscopy

Cite this

Development of a flow-through optosensor for determination of Co(II). / Yusof, Nor Azah; Ahmad, Musa.

In: Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, Vol. 69, No. 2, 02.2008, p. 413-418.

Research output: Contribution to journalArticle

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