Applicability of cloud point extraction for the separation trace amount of lead ion in environmental and biological samples prior to determination by flame atomic absorption spectrometry

A sensitive cloud point extraction procedure(CPE) for the preconcentration of trace lead prior to its determination by flame atomic absorption spectrometry (FAAS) has been developed. The CPE method is based on the complex of Pb(II) ion with 1-(2-pyridylazo)-2-naphthol (PAN), and then entrapped in th...

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Main Authors: Sayed Zia Mohammadi, Tayebeh Shamspur, Daryoush Afzali, Mohammad Ali Taher, Yar Mohammad Baghelani
Format: Article
Language:English
Published: Elsevier 2016-09-01
Series:Arabian Journal of Chemistry
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S1878535211001869
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spelling doaj-9dafbd2b7f6a42669720c9b9f5b844ea2020-11-24T23:50:22ZengElsevierArabian Journal of Chemistry1878-53522016-09-019S1S610S61510.1016/j.arabjc.2011.07.003Applicability of cloud point extraction for the separation trace amount of lead ion in environmental and biological samples prior to determination by flame atomic absorption spectrometrySayed Zia Mohammadi0Tayebeh Shamspur1Daryoush Afzali2Mohammad Ali Taher3Yar Mohammad Baghelani4Department of Chemistry, Payame Noor University, Bam, IranDepartment of Chemistry, Shahid Bahonar University, Kerman, IranInternational Center for Science, High Technology & Environmental Sciences, Kerman, IranDepartment of Chemistry, Shahid Bahonar University, Kerman, IranDepartment of Chemistry, Payame Noor University, Kerman, IranA sensitive cloud point extraction procedure(CPE) for the preconcentration of trace lead prior to its determination by flame atomic absorption spectrometry (FAAS) has been developed. The CPE method is based on the complex of Pb(II) ion with 1-(2-pyridylazo)-2-naphthol (PAN), and then entrapped in the non-ionic surfactant Triton X-114. The main factors affecting CPE efficiency, such as pH of sample solution, concentration of PAN and Triton X-114, equilibration temperature and time, were investigated in detail. A preconcentration factor of 30 was obtained for the preconcentration of Pb(II) ion with 15.0 mL solution. Under the optimal conditions, the calibration curve was linear in the range of 7.5 ng mL−1–3.5 μg mL−1 of lead with R2 = 0.9998 (n = 10). Detection limit based on three times the standard deviation of the blank (3Sb) was 5.27 ng mL−1. Eight replicate determinations of 1.0 μg mL−1 lead gave a mean absorbance of 0.275 with a relative standard deviation of 1.6%. The high efficiency of cloud point extraction to carry out the determination of analytes in complex matrices was demonstrated. The proposed method has been applied for determination of trace amounts of lead in biological and water samples with satisfactory results.http://www.sciencedirect.com/science/article/pii/S1878535211001869Cloud point extractionPreconcentrationLead determination
collection DOAJ
language English
format Article
sources DOAJ
author Sayed Zia Mohammadi
Tayebeh Shamspur
Daryoush Afzali
Mohammad Ali Taher
Yar Mohammad Baghelani
spellingShingle Sayed Zia Mohammadi
Tayebeh Shamspur
Daryoush Afzali
Mohammad Ali Taher
Yar Mohammad Baghelani
Applicability of cloud point extraction for the separation trace amount of lead ion in environmental and biological samples prior to determination by flame atomic absorption spectrometry
Arabian Journal of Chemistry
Cloud point extraction
Preconcentration
Lead determination
author_facet Sayed Zia Mohammadi
Tayebeh Shamspur
Daryoush Afzali
Mohammad Ali Taher
Yar Mohammad Baghelani
author_sort Sayed Zia Mohammadi
title Applicability of cloud point extraction for the separation trace amount of lead ion in environmental and biological samples prior to determination by flame atomic absorption spectrometry
title_short Applicability of cloud point extraction for the separation trace amount of lead ion in environmental and biological samples prior to determination by flame atomic absorption spectrometry
title_full Applicability of cloud point extraction for the separation trace amount of lead ion in environmental and biological samples prior to determination by flame atomic absorption spectrometry
title_fullStr Applicability of cloud point extraction for the separation trace amount of lead ion in environmental and biological samples prior to determination by flame atomic absorption spectrometry
title_full_unstemmed Applicability of cloud point extraction for the separation trace amount of lead ion in environmental and biological samples prior to determination by flame atomic absorption spectrometry
title_sort applicability of cloud point extraction for the separation trace amount of lead ion in environmental and biological samples prior to determination by flame atomic absorption spectrometry
publisher Elsevier
series Arabian Journal of Chemistry
issn 1878-5352
publishDate 2016-09-01
description A sensitive cloud point extraction procedure(CPE) for the preconcentration of trace lead prior to its determination by flame atomic absorption spectrometry (FAAS) has been developed. The CPE method is based on the complex of Pb(II) ion with 1-(2-pyridylazo)-2-naphthol (PAN), and then entrapped in the non-ionic surfactant Triton X-114. The main factors affecting CPE efficiency, such as pH of sample solution, concentration of PAN and Triton X-114, equilibration temperature and time, were investigated in detail. A preconcentration factor of 30 was obtained for the preconcentration of Pb(II) ion with 15.0 mL solution. Under the optimal conditions, the calibration curve was linear in the range of 7.5 ng mL−1–3.5 μg mL−1 of lead with R2 = 0.9998 (n = 10). Detection limit based on three times the standard deviation of the blank (3Sb) was 5.27 ng mL−1. Eight replicate determinations of 1.0 μg mL−1 lead gave a mean absorbance of 0.275 with a relative standard deviation of 1.6%. The high efficiency of cloud point extraction to carry out the determination of analytes in complex matrices was demonstrated. The proposed method has been applied for determination of trace amounts of lead in biological and water samples with satisfactory results.
topic Cloud point extraction
Preconcentration
Lead determination
url http://www.sciencedirect.com/science/article/pii/S1878535211001869
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