Characterization of a simple optical chemical sensor for Cu(II) detection based on immobilization of lipophilized nitroso-r reagent in sol-gel matrix

Wan Elina Faradilla Wan Khalid, Musa Ahmad, Yook Heng Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

An optical chemical sensor for Cu(II) ion, based on reflectance measurement of lipophilized nitroso-r (NRS) reagent immobilized in sol-gel matrix has been developed. The reaction between immobilized reagent with Cu(II) occurred at pH 3.0 and gave a linear response to the Cu(II) concentration in the range of 7.87 × 10-5 - 1.57 × 10-3 M with a limit of detection (LOD) of 2.22 × 10-5 M. The sensor showed a good reproducibility with RSD value of 6.3% for 3.15 × 10-4 M Cu(II) and 5.9% for 1.57 × 10-3 M while the response time was fixed at 10 min by using kinetic approach. The sensor could be regenerated with 0.2 M HCl solution. The results obtained for Cu(II) determination in tap water sample were in good agreement with those obtained using atomic absorption spectrophotometer (AAS).

Original languageEnglish
Pages (from-to)383-394
Number of pages12
JournalChiang Mai Journal of Science
Volume41
Issue number2
Publication statusPublished - 2014

Fingerprint

Chemical Sensor
Sol-gel
Optical Sensor
Optical sensors
Polymethyl Methacrylate
Chemical sensors
immobilization
Immobilization
Sol-gels
reagents
Gels
gels
Sensor
Reflectometers
Linear Response
sensors
Spectrophotometers
Sensors
Reproducibility
matrices

Keywords

  • Cu(II) sensor
  • Lipophilized nitroso-r
  • Reflectance
  • Sol-gel

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Chemistry(all)
  • Materials Science(all)
  • Physics and Astronomy(all)
  • Mathematics(all)

Cite this

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abstract = "An optical chemical sensor for Cu(II) ion, based on reflectance measurement of lipophilized nitroso-r (NRS) reagent immobilized in sol-gel matrix has been developed. The reaction between immobilized reagent with Cu(II) occurred at pH 3.0 and gave a linear response to the Cu(II) concentration in the range of 7.87 × 10-5 - 1.57 × 10-3 M with a limit of detection (LOD) of 2.22 × 10-5 M. The sensor showed a good reproducibility with RSD value of 6.3{\%} for 3.15 × 10-4 M Cu(II) and 5.9{\%} for 1.57 × 10-3 M while the response time was fixed at 10 min by using kinetic approach. The sensor could be regenerated with 0.2 M HCl solution. The results obtained for Cu(II) determination in tap water sample were in good agreement with those obtained using atomic absorption spectrophotometer (AAS).",
keywords = "Cu(II) sensor, Lipophilized nitroso-r, Reflectance, Sol-gel",
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AU - Wan Khalid, Wan Elina Faradilla

AU - Ahmad, Musa

AU - Lee, Yook Heng

PY - 2014

Y1 - 2014

N2 - An optical chemical sensor for Cu(II) ion, based on reflectance measurement of lipophilized nitroso-r (NRS) reagent immobilized in sol-gel matrix has been developed. The reaction between immobilized reagent with Cu(II) occurred at pH 3.0 and gave a linear response to the Cu(II) concentration in the range of 7.87 × 10-5 - 1.57 × 10-3 M with a limit of detection (LOD) of 2.22 × 10-5 M. The sensor showed a good reproducibility with RSD value of 6.3% for 3.15 × 10-4 M Cu(II) and 5.9% for 1.57 × 10-3 M while the response time was fixed at 10 min by using kinetic approach. The sensor could be regenerated with 0.2 M HCl solution. The results obtained for Cu(II) determination in tap water sample were in good agreement with those obtained using atomic absorption spectrophotometer (AAS).

AB - An optical chemical sensor for Cu(II) ion, based on reflectance measurement of lipophilized nitroso-r (NRS) reagent immobilized in sol-gel matrix has been developed. The reaction between immobilized reagent with Cu(II) occurred at pH 3.0 and gave a linear response to the Cu(II) concentration in the range of 7.87 × 10-5 - 1.57 × 10-3 M with a limit of detection (LOD) of 2.22 × 10-5 M. The sensor showed a good reproducibility with RSD value of 6.3% for 3.15 × 10-4 M Cu(II) and 5.9% for 1.57 × 10-3 M while the response time was fixed at 10 min by using kinetic approach. The sensor could be regenerated with 0.2 M HCl solution. The results obtained for Cu(II) determination in tap water sample were in good agreement with those obtained using atomic absorption spectrophotometer (AAS).

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