A novel 1,10-phenanthroline-sensitive membrane sensor for potentiometric determination of Hg(II) and Cu(II)cations

Sayed A.M. Marzouk; Wadie T. Al-Ariqui; Saad S.M. Hassan

doi:10.1007/s00216-003-1755-y

A novel 1,10-phenanthroline-sensitive membrane sensor for potentiometric determination of Hg(II) and Cu(II)cations

Sayed A.M. Marzouk, Wadie T. Al-Ariqui, Saad S.M. Hassan

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

Preparation, characterization, and applications of a 1,10-phenanthrolinium cation (phenH⁺)-sensitive potentiometric sensor are described. The sensor incorporates a liquid polymeric membrane consisting of phenH-tetraphenylborate, nitrophenyloctyl ether, and poly(vinyl chloride) as ion exchanger, plasticizer, and polymeric support, respectively. The sensor exhibits a fast and Nernstian response to phenH⁺ over the concentration range of 6×10^-6-2×10^-4M with a monovalent cationic slope of 58.0± 0.5 mV/log[phenH⁺] in acetate buffer of pH 4.2. The sensor is successfully applied to the monitoring of the potentiometric titration of Hg(II) and Cu(II) ions with phen solution in the presence of citrate and acetate buffers of pH 4.2, respectively. Sharp inflection breaks (90-180 mV) at 1:1 (metal:phen reaction) are obtained in the presence of chloride and thiocyanate background. This stoichiometry is explained by the formation of insoluble [HgCl₂(phen)], [Hg(SCN) ₂(phen)], and [Cu(SCN)₂(phen)] complexes. Optimization of each titration and the effect of foreign ions are evaluated. The method offers the advantages of adequate sensitivity, accuracy, and selectivity for the determination of mercury and copper in pharmaceutical, rock, and tea samples. The results are in good agreement with those obtained using the standard atomic absorption spectrometric and United States Pharmacopeial methods.

Original language	English
Pages (from-to)	1186-1192
Number of pages	7
Journal	Analytical and Bioanalytical Chemistry
Volume	375
Issue number	8
DOIs	https://doi.org/10.1007/s00216-003-1755-y
Publication status	Published - Apr 2003
Externally published	Yes

Keywords

1,10-Phenanthroline
Copper in tea, Mercury in pharmaceuticals
Determination of Hg(II) and Cu(II)
Polymeric membrane sensors
Potentiometric titration

ASJC Scopus subject areas

Analytical Chemistry
Biochemistry

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10.1007/s00216-003-1755-y

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title = "A novel 1,10-phenanthroline-sensitive membrane sensor for potentiometric determination of Hg(II) and Cu(II)cations",

abstract = "Preparation, characterization, and applications of a 1,10-phenanthrolinium cation (phenH+)-sensitive potentiometric sensor are described. The sensor incorporates a liquid polymeric membrane consisting of phenH-tetraphenylborate, nitrophenyloctyl ether, and poly(vinyl chloride) as ion exchanger, plasticizer, and polymeric support, respectively. The sensor exhibits a fast and Nernstian response to phenH+ over the concentration range of 6×10-6-2×10-4M with a monovalent cationic slope of 58.0± 0.5 mV/log[phenH+] in acetate buffer of pH 4.2. The sensor is successfully applied to the monitoring of the potentiometric titration of Hg(II) and Cu(II) ions with phen solution in the presence of citrate and acetate buffers of pH 4.2, respectively. Sharp inflection breaks (90-180 mV) at 1:1 (metal:phen reaction) are obtained in the presence of chloride and thiocyanate background. This stoichiometry is explained by the formation of insoluble [HgCl2(phen)], [Hg(SCN) 2(phen)], and [Cu(SCN)2(phen)] complexes. Optimization of each titration and the effect of foreign ions are evaluated. The method offers the advantages of adequate sensitivity, accuracy, and selectivity for the determination of mercury and copper in pharmaceutical, rock, and tea samples. The results are in good agreement with those obtained using the standard atomic absorption spectrometric and United States Pharmacopeial methods.",

keywords = "1,10-Phenanthroline, Copper in tea, Mercury in pharmaceuticals, Determination of Hg(II) and Cu(II), Polymeric membrane sensors, Potentiometric titration",

author = "Marzouk, {Sayed A.M.} and Al-Ariqui, {Wadie T.} and Hassan, {Saad S.M.}",

year = "2003",

month = apr,

doi = "10.1007/s00216-003-1755-y",

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T1 - A novel 1,10-phenanthroline-sensitive membrane sensor for potentiometric determination of Hg(II) and Cu(II)cations

AU - Marzouk, Sayed A.M.

AU - Al-Ariqui, Wadie T.

AU - Hassan, Saad S.M.

PY - 2003/4

Y1 - 2003/4

N2 - Preparation, characterization, and applications of a 1,10-phenanthrolinium cation (phenH+)-sensitive potentiometric sensor are described. The sensor incorporates a liquid polymeric membrane consisting of phenH-tetraphenylborate, nitrophenyloctyl ether, and poly(vinyl chloride) as ion exchanger, plasticizer, and polymeric support, respectively. The sensor exhibits a fast and Nernstian response to phenH+ over the concentration range of 6×10-6-2×10-4M with a monovalent cationic slope of 58.0± 0.5 mV/log[phenH+] in acetate buffer of pH 4.2. The sensor is successfully applied to the monitoring of the potentiometric titration of Hg(II) and Cu(II) ions with phen solution in the presence of citrate and acetate buffers of pH 4.2, respectively. Sharp inflection breaks (90-180 mV) at 1:1 (metal:phen reaction) are obtained in the presence of chloride and thiocyanate background. This stoichiometry is explained by the formation of insoluble [HgCl2(phen)], [Hg(SCN) 2(phen)], and [Cu(SCN)2(phen)] complexes. Optimization of each titration and the effect of foreign ions are evaluated. The method offers the advantages of adequate sensitivity, accuracy, and selectivity for the determination of mercury and copper in pharmaceutical, rock, and tea samples. The results are in good agreement with those obtained using the standard atomic absorption spectrometric and United States Pharmacopeial methods.

AB - Preparation, characterization, and applications of a 1,10-phenanthrolinium cation (phenH+)-sensitive potentiometric sensor are described. The sensor incorporates a liquid polymeric membrane consisting of phenH-tetraphenylborate, nitrophenyloctyl ether, and poly(vinyl chloride) as ion exchanger, plasticizer, and polymeric support, respectively. The sensor exhibits a fast and Nernstian response to phenH+ over the concentration range of 6×10-6-2×10-4M with a monovalent cationic slope of 58.0± 0.5 mV/log[phenH+] in acetate buffer of pH 4.2. The sensor is successfully applied to the monitoring of the potentiometric titration of Hg(II) and Cu(II) ions with phen solution in the presence of citrate and acetate buffers of pH 4.2, respectively. Sharp inflection breaks (90-180 mV) at 1:1 (metal:phen reaction) are obtained in the presence of chloride and thiocyanate background. This stoichiometry is explained by the formation of insoluble [HgCl2(phen)], [Hg(SCN) 2(phen)], and [Cu(SCN)2(phen)] complexes. Optimization of each titration and the effect of foreign ions are evaluated. The method offers the advantages of adequate sensitivity, accuracy, and selectivity for the determination of mercury and copper in pharmaceutical, rock, and tea samples. The results are in good agreement with those obtained using the standard atomic absorption spectrometric and United States Pharmacopeial methods.

KW - 1,10-Phenanthroline

KW - Copper in tea, Mercury in pharmaceuticals

KW - Determination of Hg(II) and Cu(II)

KW - Polymeric membrane sensors

KW - Potentiometric titration

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SN - 1618-2642

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JO - Analytical and Bioanalytical Chemistry

JF - Analytical and Bioanalytical Chemistry

IS - 8

ER -

A novel 1,10-phenanthroline-sensitive membrane sensor for potentiometric determination of Hg(II) and Cu(II)cations

Abstract

Keywords

ASJC Scopus subject areas

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