A reliable method of quantification of trace copper in beverages with and without alcohol by spectrophotometry after cloud point extraction
A new cloud point extraction (CPE) method was developed for the separation and preconcentration of copper (II) prior to spectrophotometric analysis. For this purpose, 1-(2,4-dimethylphenyl) azonapthalen-2-ol (Sudan II) was used as a chelating agent and the solution pH was adjusted to 10.0 with borat...
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Sociedade Brasileira de Química
2013-01-01
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doaj-75289700abe3421cb4f3c082be1b51062020-11-24T20:44:05ZengSociedade Brasileira de QuímicaQuímica Nova1678-70642013-01-013681146115410.1590/S0100-40422013000800012S0100-40422013000800012A reliable method of quantification of trace copper in beverages with and without alcohol by spectrophotometry after cloud point extractionRamazan Gürkan0Nail Altunay1Cumhuriyet UniversityCumhuriyet UniversityA new cloud point extraction (CPE) method was developed for the separation and preconcentration of copper (II) prior to spectrophotometric analysis. For this purpose, 1-(2,4-dimethylphenyl) azonapthalen-2-ol (Sudan II) was used as a chelating agent and the solution pH was adjusted to 10.0 with borate buffer. Polyethylene glycol tert-octylphenyl ether (Triton X-114) was used as an extracting agent in the presence of sodium dodecylsulphate (SDS). After phase separation, based on the cloud point of the mixture, the surfactant-rich phase was diluted with acetone, and the enriched analyte was spectrophotometrically determined at 537 nm. The variables affecting CPE efficiency were optimized. The calibration curve was linear within the range 0.285-20 µg L-1 with a detection limit of 0.085 µg L-1. The method was successfully applied to the quantification of copper in different beverage samples.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000800012&lng=en&tlng=encopperbeverage samplescloud point extraction |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ramazan Gürkan Nail Altunay |
spellingShingle |
Ramazan Gürkan Nail Altunay A reliable method of quantification of trace copper in beverages with and without alcohol by spectrophotometry after cloud point extraction Química Nova copper beverage samples cloud point extraction |
author_facet |
Ramazan Gürkan Nail Altunay |
author_sort |
Ramazan Gürkan |
title |
A reliable method of quantification of trace copper in beverages with and without alcohol by spectrophotometry after cloud point extraction |
title_short |
A reliable method of quantification of trace copper in beverages with and without alcohol by spectrophotometry after cloud point extraction |
title_full |
A reliable method of quantification of trace copper in beverages with and without alcohol by spectrophotometry after cloud point extraction |
title_fullStr |
A reliable method of quantification of trace copper in beverages with and without alcohol by spectrophotometry after cloud point extraction |
title_full_unstemmed |
A reliable method of quantification of trace copper in beverages with and without alcohol by spectrophotometry after cloud point extraction |
title_sort |
reliable method of quantification of trace copper in beverages with and without alcohol by spectrophotometry after cloud point extraction |
publisher |
Sociedade Brasileira de Química |
series |
Química Nova |
issn |
1678-7064 |
publishDate |
2013-01-01 |
description |
A new cloud point extraction (CPE) method was developed for the separation and preconcentration of copper (II) prior to spectrophotometric analysis. For this purpose, 1-(2,4-dimethylphenyl) azonapthalen-2-ol (Sudan II) was used as a chelating agent and the solution pH was adjusted to 10.0 with borate buffer. Polyethylene glycol tert-octylphenyl ether (Triton X-114) was used as an extracting agent in the presence of sodium dodecylsulphate (SDS). After phase separation, based on the cloud point of the mixture, the surfactant-rich phase was diluted with acetone, and the enriched analyte was spectrophotometrically determined at 537 nm. The variables affecting CPE efficiency were optimized. The calibration curve was linear within the range 0.285-20 µg L-1 with a detection limit of 0.085 µg L-1. The method was successfully applied to the quantification of copper in different beverage samples. |
topic |
copper beverage samples cloud point extraction |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000800012&lng=en&tlng=en |
work_keys_str_mv |
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