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Determination of Nano Amounts of Copper in Environmental, Biological, and Water Samples Via Cloud Point Extraction and Spectrophotometry

Determination of Nano Amounts of Copper in Environmental, Biological, and Water Samples Via Cloud... AbstractA cloud point extraction procedure was presented for the preconcentration and determination of copper(II) ion in various real samples. After complexation by amino-4-(3-nitrophenylazo)pyridine-3-ol, (ANPAP), copper(II) ions was quantitatively recovered in Triton X-114 after centrifugation. 0.4 mL of ethanol acidified with 1.0 M HNO3 was added to the surfactant-rich phase prior to its analysis by specrophotometry at λmax 618. The influence of analytical parameters including complexing agent, Triton X-114, buffer solutions, bath temperature, heating time, centrifuge rate and time were optimized. Under the optimum conditions, the calibration curve is linear for the concentration range of 4.0-115 ng mL-1. The detection and quantification limits of the method were 1.20 and 3.94 ng mL-1 of Cu(II) ion. The enhancement factor of 250 was achieved for 100 mL samples containing the analyte with RSDs were 31.25%. The interference effect of some anions and cations was also tested. The method was applied to determine of copper in environmental, water and biological samples. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Analytical Chemistry Letters Taylor & Francis

Determination of Nano Amounts of Copper in Environmental, Biological, and Water Samples Via Cloud Point Extraction and Spectrophotometry

Amin, Alaa S.; Kassem, Mohammed A.
Analytical Chemistry Letters , Volume 6 (6): 14 – Nov 1, 2016
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Determination of Nano Amounts of Copper in Environmental, Biological, and Water Samples Via Cloud Point Extraction and Spectrophotometry

Amin, Alaa S.; Kassem, Mohammed A.
Analytical Chemistry Letters , Volume 6 (6): 14 – Nov 1, 2016

Abstract

AbstractA cloud point extraction procedure was presented for the preconcentration and determination of copper(II) ion in various real samples. After complexation by amino-4-(3-nitrophenylazo)pyridine-3-ol, (ANPAP), copper(II) ions was quantitatively recovered in Triton X-114 after centrifugation. 0.4 mL of ethanol acidified with 1.0 M HNO3 was added to the surfactant-rich phase prior to its analysis by specrophotometry at λmax 618. The influence of analytical parameters including complexing agent, Triton X-114, buffer solutions, bath temperature, heating time, centrifuge rate and time were optimized. Under the optimum conditions, the calibration curve is linear for the concentration range of 4.0-115 ng mL-1. The detection and quantification limits of the method were 1.20 and 3.94 ng mL-1 of Cu(II) ion. The enhancement factor of 250 was achieved for 100 mL samples containing the analyte with RSDs were 31.25%. The interference effect of some anions and cations was also tested. The method was applied to determine of copper in environmental, water and biological samples.

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Publisher
Taylor & Francis
Copyright
© 2016 Har Krishan Bhalla & Sons
ISSN
2230-7532
eISSN
2229-7928
DOI
10.1080/22297928.2017.1279568
Publisher site
See Article on Publisher Site

Abstract

AbstractA cloud point extraction procedure was presented for the preconcentration and determination of copper(II) ion in various real samples. After complexation by amino-4-(3-nitrophenylazo)pyridine-3-ol, (ANPAP), copper(II) ions was quantitatively recovered in Triton X-114 after centrifugation. 0.4 mL of ethanol acidified with 1.0 M HNO3 was added to the surfactant-rich phase prior to its analysis by specrophotometry at λmax 618. The influence of analytical parameters including complexing agent, Triton X-114, buffer solutions, bath temperature, heating time, centrifuge rate and time were optimized. Under the optimum conditions, the calibration curve is linear for the concentration range of 4.0-115 ng mL-1. The detection and quantification limits of the method were 1.20 and 3.94 ng mL-1 of Cu(II) ion. The enhancement factor of 250 was achieved for 100 mL samples containing the analyte with RSDs were 31.25%. The interference effect of some anions and cations was also tested. The method was applied to determine of copper in environmental, water and biological samples.

Journal

Analytical Chemistry Letters – Taylor & Francis

Published: Nov 1, 2016

Keywords: Copper determination; Cloud point extraction; Spectrophotometry; Triton X-114; Azo compound; Environmental; Water and biological analysis

References

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