JOURNAL OF CHILEAN CHEMICAL SOCIETY

Vol 63 No 4 (2018): Journal of the Chilean Chemical Society
Original Research Papers

PRECONCENTRATION AND SEPARATION OF ULTRA-TRACE AMOUNTS OF MERCURY(II) USING ULTRASOUND-ASSISTED CLOUD POINT-MICRO SOLID PHASE EXTRACTION BASED ON MODIFIED SILICA AEROGEL WITH [1-(3,5-DICHOLOROPHENYL)-3(2-ETHOXYPHENYL)] TRIAZENE

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  • Shiva Motahar,
  • Mohammad Saber-Tehrani,
  • Parviz Aberoomand Azar,
  • Fariba Tadayon
Shiva Motahar
Department of chemistry, Science and Research Branch, Islamic Azad University
Mohammad Saber-Tehrani
Department of chemistry, Science and Research Branch, Islamic Azad University
Parviz Aberoomand Azar
Department of chemistry, Science and Research Branch, Islamic Azad University
Fariba Tadayon
Department of chemistry, North Tehran Branch, Islamic Azad University
Published January 9, 2019
Keywords
  • Mercury(II),
  • Triazene,
  • Ultrasound-assisted cloud point-micro solid phase extraction,
  • silica aerogel
How to Cite
Motahar, S., Saber-Tehrani, M., Aberoomand Azar, P., & Tadayon, F. (2019). PRECONCENTRATION AND SEPARATION OF ULTRA-TRACE AMOUNTS OF MERCURY(II) USING ULTRASOUND-ASSISTED CLOUD POINT-MICRO SOLID PHASE EXTRACTION BASED ON MODIFIED SILICA AEROGEL WITH [1-(3,5-DICHOLOROPHENYL)-3(2-ETHOXYPHENYL)] TRIAZENE. Journal of the Chilean Chemical Society, 63(4). Retrieved from https://www.jcchems.com/index.php/JCCHEMS/article/view/914

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Abstract

In this study, a separation-preconcentration procedure, ultrasound-assisted cloud point-micro solid phase extraction (USA-CP-MSPE) with modified silica aerogel, was developed for the determination of Hg (II) from water samples- modified silica aerogel (SA) adsorbent coupled with metal chelating ligands of [1-(3,5-dicholorophenyl)-3(2-ethoxyphenyl)] triazene (DCPEPT). The adsorbent was characterized by fourier transform infrared spectra (FTIR) and scanning electron microscope (SEM). Some effective factors that influence the microextraction efficiency were investigated and optimized. Desorption study showed that over 96.25 % of Hg(II) could be desorbed from SA-DCPEPT with 1M KBr solution. The influences of some cations and anions on Hg(II) recoveries were also examined. An enhancement factor of 110 was achieved with 1mL sample. The detection limit for mercury(II) ions was 1.5 ng L−1. This method is a simple, fast, accurate, highly stable and selective method which has successfully been applied to the speciation of mercury in water samples.

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