Comparison of ultrasound-assisted, surfactant-assisted and conventional dispersive liquid–liquid microextraction coupled with flame atomic absorption spectrometry for the determination of copper

2013 ◽  
Vol 5 (21) ◽  
pp. 6030 ◽  
Author(s):  
Xiaodong Wen ◽  
Min Fan ◽  
Deqing Yang ◽  
Min Li ◽  
Chunyan Li ◽  
...  
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Flame Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Flame Atomic Absorption ◽  
Ultrasound Assisted ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction ◽  
Determination Of Copper ◽  
Surfactant Assisted

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.

scholarly journals Surfactant-Assisted Emulsification and Surfactant-Based Dispersive Liquid–Liquid Microextraction Method for Determination of Cu(II) in Food and Water Samples by Flame Atomic Absorption Spectrometry

2019 ◽  
Vol 102 (5) ◽  
pp. 1516-1522 ◽  
Author(s):  
Abdullah Taner Bi·şgi·n
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Flame Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Flame Atomic Absorption ◽  
Preconcentration Factor ◽  
Dispersive Liquid Liquid Microextraction ◽  
Triton X ◽  
Liquid Microextraction ◽  
Surfactant Assisted

Abstract Background: Copper (Cu) is an essential metal for humans at certain concentrations. However, it can be toxic at higher concentrations. Therefore, determination of Cu content of foodstuff is important. Objective: The aim of the study was to develop a simple, economical, and environmentally friendly surfactant-mediated extraction method for the determination of Cu using surfactants and flame atomic absorption spectrometry (FAAS). Methods: A nonionic surfactant-assisted emulsification and surfactant-based dispersive liquid–liquid microextraction method was developed for the separation, preconcentration, and determination of Cu by FAAS. Triton X-15 nonionic surfactant, which is insoluble in water, was used as an extractive agent. Triton X-114 (TX-114) nonionic water-soluble surfactant was used as a disperser solvent. Dithizone was used as a complexing agent for complexation of Cu(II) at pH 4. Results: The detection and quantitation limits of the method were determined as 1.61 and 3.82 μg/L, respectively. The preconcentration factor was obtained as 50. Relative SD based on 10 replicates was obtained as 3.7%. Accuracy of the developed method was proved using certified standard reference materials. Cu(II) content of edible mushroom samples was determined between 12 and 19 μg/g. Recoveries were obtained between 96 and 101%. Conclusions: The developed surfactant-assisted emulsification and surfactant-based dispersive liquid–liquid microextraction method has represented the wide linear ranges, low detection limit, and high preconcentration factor for Cu ions. Highlights: TX-114 surfactant was used as both sticking agent and disperser solvent. The method does not require expert personnel and high operational costs. The method is environmentally friendly because mainly surfactants and low-toxicity organic solvents are used in the recommended procedure.

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