A novel, environmentally friendly dispersive liquid–liquid microextraction procedure for the determination of copper

2011 ◽  
Vol 99 (1) ◽  
pp. 40-45 ◽  
Author(s):  
Jana Škrlíková ◽  
Vasil Andruch ◽  
Ioseph S. Balogh ◽  
Lívia Kocúrová ◽  
Lajos Nagy ◽  
...  
Keyword(s):  
Environmentally Friendly ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction ◽  
Determination Of Copper

A Simple and Rapid Dispersive Liquid–Liquid Microextraction Based on Solidification of Floating Organic Drop Method Combined with Flame Atomic Absorption Spectrometry for Preconcentration and Determination of Copper

2013 ◽  
Vol 96 (2) ◽  
pp. 441-446 ◽  
Author(s):  
Mohammad Mirzaei ◽  
Mansoureh Behzadi
Keyword(s):  
Complex Formation ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Flame Atomic Absorption ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction ◽  
Determination Of Copper

Abstract A simple and rapid dispersive liquid–liquid microextraction based on solidification of floating organic drop method prior to flame atomic absorption spectrometry was developed for preconcentration and determination of copper. In this technique, simultaneous complex formation and extraction was performed with rapid injection of a mixture containing ethanol, 1-undecanol, and 1-(2-pyridylazo)-2-naphthol into a water sample spiked with Cu(II). After centrifugation, the test tube was cooled in an ice bath, and solidified extract transferred into a conical vial. Finally, it was dissolved into ethanol and copper concentration was determined. Some effective parameters of extraction and complex formation, such as extraction and disperser solvent type and volume, pH, concentration of the chelating agent, salt effect, and extraction time, were optimized. Under the optimum conditions, the calibration graph was linear in the range of 0.50 ng/mL to 0.30 μg/mL, with an LOD of 0.16 ng/mL. The RSD for 10 replicate measurements of 50.0 ng/mL of copper was ±1.4%. Two certified reference materials were analyzed, and the determined values were in good agreement with the certified values.

Multivariate optimization of a dispersive liquid-liquid microextraction method for determination of copper and manganese in coconut water by FAAS

2021 ◽  
pp. 130473
Author(s):  
Joabes Santos Trindade ◽  
Valfredo Azevedo Lemos ◽  
Uillian Mozart Ferreira da Mata Cerqueira ◽  
Cleber Galvao Novaes ◽  
Sulene Alves Araujo ◽  
...  
Keyword(s):  
Coconut Water ◽  
Multivariate Optimization ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction ◽  
Determination Of Copper
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