Extraction spectrophotometric determination of mercury(II) using thiacrown ethers and Bromocresol Green

Bahruddin Saad; Salah M. Sultan

doi:10.1016/0039-9140(95)01514-C

Extraction spectrophotometric determination of mercury(II) using thiacrown ethers and Bromocresol Green

Bahruddin Saad, Salah M. Sultan^*

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

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

34 Scopus citations

Abstract

A reasonably sensitive and highly selective spectrophotometric method for the determination of mercury(II) is proposed. The method is based on the extraction of the ion-associate formed by a mercury(II) thiacrown ether cationic complex with Bromocresol Green as the anionic counter-ion using chloroform as the extracting solvent. The effect of thiacrown ethers of different cavity sizes, namely 1,4,7,10,13-pentathiacyclopentadecane (PTP) and 1,4,7,10,13,16-hexathiacyclooctadecane (HTO), the thiacrown ether concentration, the extracting solvent, the bromocresol green concentration and the aqueous phase pH on the extraction were investigated. Measurement of the absorbance at the λ_max (420 nm) of the extracted ion-associate reveals that Beer's law is obeyed over 0.5-12.0 ppm mercury(II) for both ligands. Slight interference from copper(II) and cadmium(II) is exhibited by the PTP ligand, while HTO is negligibly affected by these metal ions. Strong interference from silver(I) is evident for both ligands while alkali, alkaline earth and other transition metals tested posed negligible interference. Analysis of mercury in synthetic complex mixtures was satisfactory.

Original language	English
Pages (from-to)	1349-1354
Number of pages	6
Journal	Talanta
Volume	42
Issue number	10
DOIs	https://doi.org/10.1016/0039-9140(95)01514-C
State	Published - Oct 1995

Bibliographical note

Funding Information:
One of us (B. Saad) is indebted to the King Fahd University of Petroleum and Minerals for a post-doctoral fellowship and to the Universiti Sains Malaysia, Penang for granting leave of absence.

ASJC Scopus subject areas

Analytical Chemistry

Access to Document

10.1016/0039-9140(95)01514-C

Cite this

@article{7c6ccc26363249eb8858e7b48452c81e,

title = "Extraction spectrophotometric determination of mercury(II) using thiacrown ethers and Bromocresol Green",

abstract = "A reasonably sensitive and highly selective spectrophotometric method for the determination of mercury(II) is proposed. The method is based on the extraction of the ion-associate formed by a mercury(II) thiacrown ether cationic complex with Bromocresol Green as the anionic counter-ion using chloroform as the extracting solvent. The effect of thiacrown ethers of different cavity sizes, namely 1,4,7,10,13-pentathiacyclopentadecane (PTP) and 1,4,7,10,13,16-hexathiacyclooctadecane (HTO), the thiacrown ether concentration, the extracting solvent, the bromocresol green concentration and the aqueous phase pH on the extraction were investigated. Measurement of the absorbance at the λmax (420 nm) of the extracted ion-associate reveals that Beer's law is obeyed over 0.5-12.0 ppm mercury(II) for both ligands. Slight interference from copper(II) and cadmium(II) is exhibited by the PTP ligand, while HTO is negligibly affected by these metal ions. Strong interference from silver(I) is evident for both ligands while alkali, alkaline earth and other transition metals tested posed negligible interference. Analysis of mercury in synthetic complex mixtures was satisfactory.",

author = "Bahruddin Saad and Sultan, \{Salah M.\}",

note = "Funding Information: One of us (B. Saad) is indebted to the King Fahd University of Petroleum and Minerals for a post-doctoral fellowship and to the Universiti Sains Malaysia, Penang for granting leave of absence.",

year = "1995",

month = oct,

doi = "10.1016/0039-9140(95)01514-C",

language = "English",

volume = "42",

pages = "1349--1354",

journal = "Talanta",

issn = "0039-9140",

number = "10",

}

TY - JOUR

T1 - Extraction spectrophotometric determination of mercury(II) using thiacrown ethers and Bromocresol Green

AU - Saad, Bahruddin

AU - Sultan, Salah M.

N1 - Funding Information: One of us (B. Saad) is indebted to the King Fahd University of Petroleum and Minerals for a post-doctoral fellowship and to the Universiti Sains Malaysia, Penang for granting leave of absence.

PY - 1995/10

Y1 - 1995/10

N2 - A reasonably sensitive and highly selective spectrophotometric method for the determination of mercury(II) is proposed. The method is based on the extraction of the ion-associate formed by a mercury(II) thiacrown ether cationic complex with Bromocresol Green as the anionic counter-ion using chloroform as the extracting solvent. The effect of thiacrown ethers of different cavity sizes, namely 1,4,7,10,13-pentathiacyclopentadecane (PTP) and 1,4,7,10,13,16-hexathiacyclooctadecane (HTO), the thiacrown ether concentration, the extracting solvent, the bromocresol green concentration and the aqueous phase pH on the extraction were investigated. Measurement of the absorbance at the λmax (420 nm) of the extracted ion-associate reveals that Beer's law is obeyed over 0.5-12.0 ppm mercury(II) for both ligands. Slight interference from copper(II) and cadmium(II) is exhibited by the PTP ligand, while HTO is negligibly affected by these metal ions. Strong interference from silver(I) is evident for both ligands while alkali, alkaline earth and other transition metals tested posed negligible interference. Analysis of mercury in synthetic complex mixtures was satisfactory.

AB - A reasonably sensitive and highly selective spectrophotometric method for the determination of mercury(II) is proposed. The method is based on the extraction of the ion-associate formed by a mercury(II) thiacrown ether cationic complex with Bromocresol Green as the anionic counter-ion using chloroform as the extracting solvent. The effect of thiacrown ethers of different cavity sizes, namely 1,4,7,10,13-pentathiacyclopentadecane (PTP) and 1,4,7,10,13,16-hexathiacyclooctadecane (HTO), the thiacrown ether concentration, the extracting solvent, the bromocresol green concentration and the aqueous phase pH on the extraction were investigated. Measurement of the absorbance at the λmax (420 nm) of the extracted ion-associate reveals that Beer's law is obeyed over 0.5-12.0 ppm mercury(II) for both ligands. Slight interference from copper(II) and cadmium(II) is exhibited by the PTP ligand, while HTO is negligibly affected by these metal ions. Strong interference from silver(I) is evident for both ligands while alkali, alkaline earth and other transition metals tested posed negligible interference. Analysis of mercury in synthetic complex mixtures was satisfactory.

UR - https://www.scopus.com/pages/publications/0029424165

U2 - 10.1016/0039-9140(95)01514-C

DO - 10.1016/0039-9140(95)01514-C

M3 - Article

AN - SCOPUS:0029424165

SN - 0039-9140

VL - 42

SP - 1349

EP - 1354

JO - Talanta

JF - Talanta

IS - 10

ER -

Extraction spectrophotometric determination of mercury(II) using thiacrown ethers and Bromocresol Green

Abstract

Bibliographical note

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this