A flow cell optosensor for determination of Co(II) based on immobilised 2-(4-pyridylazo)resorcinol in chitosan membrane by using stopped flow, flow injection analysis

Nor Azah Yusof, Musa Ahmad

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26 Citations (Scopus)

Abstract

A flow cell optosensor, for the determination of Co(II), was developed in this study based on 2-(4-pyridylazo)resorcinol (PAR) immobilised in chitosan membrane as a transducer. This transducer was incorporated to the distal end of a bifurcated optical fibre, which, on the other hand, was connected to a stopped flow FIA instrumentation. An optimum response was obtained at pH 7.0. The sensor produced a linear response for Co(II) concentration range of 1.0 × 10-3 to 1.0 × 104 ppm with detection limit of 7.9 × 10-6 ppm. The calculated relative standard deviation (R.S.D.) of the repeatability and reproducibility of the method are 1.6 and 5.8%, respectively. The sensor can be regenerated by using a mix solution of HCl (0.2 M) and saturated KCl. Interference from foreign ions was also studied at 1:1 mole ratio of Co(II):foreign ions.

Original languageEnglish
Pages (from-to)127-133
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume86
Issue number2-3
DOIs
Publication statusPublished - 20 Sep 2002

Fingerprint

Chitosan
Transducers
Flow measuring instruments
transducers
Ions
injection
membranes
Membranes
sensors
Sensors
cells
Optical fibers
standard deviation
ions
optical fibers
interference
4-(2-pyridylazo)resorcinol

Keywords

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

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

Cite this

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title = "A flow cell optosensor for determination of Co(II) based on immobilised 2-(4-pyridylazo)resorcinol in chitosan membrane by using stopped flow, flow injection analysis",
abstract = "A flow cell optosensor, for the determination of Co(II), was developed in this study based on 2-(4-pyridylazo)resorcinol (PAR) immobilised in chitosan membrane as a transducer. This transducer was incorporated to the distal end of a bifurcated optical fibre, which, on the other hand, was connected to a stopped flow FIA instrumentation. An optimum response was obtained at pH 7.0. The sensor produced a linear response for Co(II) concentration range of 1.0 × 10-3 to 1.0 × 104 ppm with detection limit of 7.9 × 10-6 ppm. The calculated relative standard deviation (R.S.D.) of the repeatability and reproducibility of the method are 1.6 and 5.8{\%}, respectively. The sensor can be regenerated by using a mix solution of HCl (0.2 M) and saturated KCl. Interference from foreign ions was also studied at 1:1 mole ratio of Co(II):foreign ions.",
keywords = "Chitosan membrane, Co(II) sensor, Flow injection analysis (FIA), Optical fibre",
author = "Yusof, {Nor Azah} and Musa Ahmad",
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AU - Yusof, Nor Azah

AU - Ahmad, Musa

PY - 2002/9/20

Y1 - 2002/9/20

N2 - A flow cell optosensor, for the determination of Co(II), was developed in this study based on 2-(4-pyridylazo)resorcinol (PAR) immobilised in chitosan membrane as a transducer. This transducer was incorporated to the distal end of a bifurcated optical fibre, which, on the other hand, was connected to a stopped flow FIA instrumentation. An optimum response was obtained at pH 7.0. The sensor produced a linear response for Co(II) concentration range of 1.0 × 10-3 to 1.0 × 104 ppm with detection limit of 7.9 × 10-6 ppm. The calculated relative standard deviation (R.S.D.) of the repeatability and reproducibility of the method are 1.6 and 5.8%, respectively. The sensor can be regenerated by using a mix solution of HCl (0.2 M) and saturated KCl. Interference from foreign ions was also studied at 1:1 mole ratio of Co(II):foreign ions.

AB - A flow cell optosensor, for the determination of Co(II), was developed in this study based on 2-(4-pyridylazo)resorcinol (PAR) immobilised in chitosan membrane as a transducer. This transducer was incorporated to the distal end of a bifurcated optical fibre, which, on the other hand, was connected to a stopped flow FIA instrumentation. An optimum response was obtained at pH 7.0. The sensor produced a linear response for Co(II) concentration range of 1.0 × 10-3 to 1.0 × 104 ppm with detection limit of 7.9 × 10-6 ppm. The calculated relative standard deviation (R.S.D.) of the repeatability and reproducibility of the method are 1.6 and 5.8%, respectively. The sensor can be regenerated by using a mix solution of HCl (0.2 M) and saturated KCl. Interference from foreign ions was also studied at 1:1 mole ratio of Co(II):foreign ions.

KW - Chitosan membrane

KW - Co(II) sensor

KW - Flow injection analysis (FIA)

KW - Optical fibre

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