A new electrochemical sensor based on task-specific ionic liquids-modified palm shell activated carbon for the determination of mercury in water samples

In this study, a potentiometric sensor composed of palm shell activated carbon modified with trioctylmethylammonium thiosalicylate (TOMATS) was used for the potentiometric determination of mercury ions in water samples. The proposed potentiometric sensor has good operating characteristics towards Hg...

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Published inSensors (Basel, Switzerland) Vol. 14; no. 7; pp. 13102 - 13113
Main Authors Abu Ismaiel, Ahmed, Aroua, Mohamed Kheireddine, Yusoff, Rozita
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 21.07.2014
MDPI
Subjects
Activated carbon
Carbon - chemistry
Cationic
Electrochemical Techniques - instrumentation
Electrodes
ion selective electrode
ionic liquid
Ionic Liquids - chemistry
Ions - chemistry
Limit of Detection
mercury
Mercury (metal)
Mercury - chemistry
Palm
palm shell activated carbon
Pollutants
Potentiometry - methods
Scientific imaging
Selectivity
Sensors
Shells
TOMATS
Water - analysis
Water - chemistry
Kuala Lumpur Malaysia
Malaysia
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Abstract In this study, a potentiometric sensor composed of palm shell activated carbon modified with trioctylmethylammonium thiosalicylate (TOMATS) was used for the potentiometric determination of mercury ions in water samples. The proposed potentiometric sensor has good operating characteristics towards Hg (II), including a relatively high selectivity; a Nernstian response to Hg (II) ions in a concentration range of 1.0 × 10(-9) to 1.0 × 10(-2) M, with a detection limit of 1 × 10(-10) M and a slope of 44.08 ± 1.0 mV/decade; and a fast response time (~5 s). No significant changes in electrode potential were observed when the pH was varied over the range of 3-9. Additionally, the proposed electrode was characterized by good selectivity towards Hg (II) and no significant interferences from other cationic or anionic species.
AbstractList In this study, a potentiometric sensor composed of palm shell activated carbon modified with trioctylmethylammonium thiosalicylate (TOMATS) was used for the potentiometric determination of mercury ions in water samples. The proposed potentiometric sensor has good operating characteristics towards Hg (II), including a relatively high selectivity; a Nernstian response to Hg (II) ions in a concentration range of 1.0 × 10−9 to 1.0 × 10−2 M, with a detection limit of 1 × 10−10 M and a slope of 44.08 ± 1.0 mV/decade; and a fast response time (~5 s). No significant changes in electrode potential were observed when the pH was varied over the range of 3–9. Additionally, the proposed electrode was characterized by good selectivity towards Hg (II) and no significant interferences from other cationic or anionic species.
In this study, a potentiometric sensor composed of palm shell activated carbon modified with trioctylmethylammonium thiosalicylate (TOMATS) was used for the potentiometric determination of mercury ions in water samples. The proposed potentiometric sensor has good operating characteristics towards Hg (II), including a relatively high selectivity; a Nernstian response to Hg (II) ions in a concentration range of 1.0 × 10-9 to 1.0 × 10-2 M, with a detection limit of 1 × 10-10 M and a slope of 44.08 ± 1.0 mV/decade; and a fast response time (~5 s). No significant changes in electrode potential were observed when the pH was varied over the range of 3-9. Additionally, the proposed electrode was characterized by good selectivity towards Hg (II) and no significant interferences from other cationic or anionic species.
In this study, a potentiometric sensor composed of palm shell activated carbon modified with trioctylmethylammonium thiosalicylate (TOMATS) was used for the potentiometric determination of mercury ions in water samples. The proposed potentiometric sensor has good operating characteristics towards Hg (II), including a relatively high selectivity; a Nernstian response to Hg (II) ions in a concentration range of 1.0 10-9 to 1.0 10-2 M, with a detection limit of 1 10-10 M and a slope of 44.08 plus or minus 1.0 mV/decade; and a fast response time (~5 s). No significant changes in electrode potential were observed when the pH was varied over the range of 3-9. Additionally, the proposed electrode was characterized by good selectivity towards Hg (II) and no significant interferences from other cationic or anionic species.
In this study, a potentiometric sensor composed of palm shell activated carbon modified with trioctylmethylammonium thiosalicylate (TOMATS) was used for the potentiometric determination of mercury ions in water samples. The proposed potentiometric sensor has good operating characteristics towards Hg (II), including a relatively high selectivity; a Nernstian response to Hg (II) ions in a concentration range of 1.0 × 10 −9 to 1.0 × 10 −2 M, with a detection limit of 1 × 10 −10 M and a slope of 44.08 ± 1.0 mV/decade; and a fast response time (∼5 s). No significant changes in electrode potential were observed when the pH was varied over the range of 3–9. Additionally, the proposed electrode was characterized by good selectivity towards Hg (II) and no significant interferences from other cationic or anionic species.
Author Abu Ismaiel, Ahmed
Aroua, Mohamed Kheireddine
Yusoff, Rozita
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  email: ryusoff@um.edu.my
  organization: Chemical Engineering Department, University of Malaya, Kuala Lumpur 50603, Malaysia. ryusoff@um.edu.my
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Snippet In this study, a potentiometric sensor composed of palm shell activated carbon modified with trioctylmethylammonium thiosalicylate (TOMATS) was used for the...
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StartPage 13102
SubjectTerms Activated carbon
Carbon - chemistry
Cationic
Electrochemical Techniques - instrumentation
Electrodes
ion selective electrode
ionic liquid
Ionic Liquids - chemistry
Ions - chemistry
Limit of Detection
mercury
Mercury (metal)
Mercury - chemistry
Palm
palm shell activated carbon
Pollutants
Potentiometry - methods
Scientific imaging
Selectivity
Sensors
Shells
TOMATS
Water - analysis
Water - chemistry
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Title A new electrochemical sensor based on task-specific ionic liquids-modified palm shell activated carbon for the determination of mercury in water samples
URI https://www.ncbi.nlm.nih.gov/pubmed/25051034
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Volume 14
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