scholarly journals Evaluation of Mercury Concentrations in Groundwater Samples of Coal Field Using a Matrix-less Cloud Point Extraction Procedure Prior to Analysis by Cold Vapor Atomic Absorption Spectrometry

2016 ◽  
Vol 37 (5) ◽  
pp. 184-189
Author(s):  
Jamshed Ali ◽  
Mustafa Tuzen
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Cloud Point ◽  
Cloud Point Extraction ◽  
Extraction Procedure ◽  
Absorption Spectrometry ◽  
Coal Field ◽  
Cold Vapor ◽  
Groundwater Samples ◽  
Cold Vapor Atomic Absorption

Cloud Point Extraction and Flame Atomic Absorption Spectrometry Determination of Lead (II) in Environmental and Food Samples

2012 ◽  
Vol 95 (6) ◽  
pp. 1797-1802 ◽  
Author(s):  
Mustafa Soylak ◽  
Erkan Yilmaz ◽  
Mehrorang Ghaedi ◽  
Mortaza Montazerozohori ◽  
Marjan Sheibani
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Cloud Point ◽  
Flame Atomic Absorption Spectrometry ◽  
Cloud Point Extraction ◽  
Extraction Procedure ◽  
Absorption Spectrometry ◽  
Bath Temperature ◽  
Flame Atomic Absorption ◽  
Triton X

Abstract A cloud point extraction procedure for the preconcentration of Pb2+ in various samples following complexation with 2,2-(1E,1′E)-1,1′-(2,2′-azanediylbis(ethane-2,1-diyl)bis(azan-1-yl-1-ylidene)) bis(ethan-1-yl-1-ylidene)diphenol in Triton X-114 after centrifugation is reported. A 0.5 mL portion of methanol acidified with 1.0 M HNO3 was added to the surfactant-rich phase prior to analysis by flame atomic absorption spectrometry. The influence of analytical parameters—including pH, concentrations of ligand, Triton X-114, and HNO3, bath temperature, heating time, and centrifugation rate and time—were optimized, and the effect of the matrix ions on the recovery of Pb2+ was investigated. An LOD of 1.9 ng/mL along with a preconcentration factor of 50 with RSD of 1.0% for Pb2+ were achieved. The proposed procedure was applied to the analysis of various real samples.

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