Comparison of ultrasound-assisted extraction, microwave-assisted acid leaching and reflux for the determination of arsenic, cadmium and copper in contaminated soil samples by electrothermal atomic absorption spectrometry

2002 ◽  
Vol 17 (7) ◽  
pp. 739-742 ◽  
Author(s):  
Ari Väisänen ◽  
Reijo Suontamo
Keyword(s):  
Contaminated Soil ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Acid Leaching ◽  
Absorption Spectrometry ◽  
Soil Samples ◽  
Ultrasound Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Ultrasound Assisted

scholarly journals Flow-Injection Flame Atomic Absorption Spectrometric Determination of Trace Amounts of Cadmium in Solid and Semisolid Milk Products Coupling a Continuous Ultrasound-Assisted Extraction System with the Online Preconcentration on a Chelating Aminomethylphosphoric Acid Resin

2006 ◽  
Vol 89 (1) ◽  
pp. 185-191 ◽  
Author(s):  
Sheila Cancela ◽  
M Carmen Yebra
Keyword(s):  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Acid Extraction ◽  
Ultrasound Assisted Extraction ◽  
Milk Products ◽  
Flame Atomic Absorption ◽  
Assisted Extraction ◽  
Ultrasound Assisted

Abstract A new sensitive and low-cost method that combines continuous acid extraction, online preconcentration, and flame atomic absorption spectrometry for cadmium determination at g levels in solid and semisolid milk products is described. A continuous ultrasound-assisted extraction system is used to carry out the dynamic acid extraction step. The acid extract is preconcentrated online on a minicolumn packedwith a chelating resin (Chelite P,with aminomethylphosphoric acid groups), and the retained cadmium is elutedwith hydrochloric acid and continuously monitored by flame atomic absorption spectrometry. An experimental design (Plackett-Burman 263/16) is used to optimize the continuous extraction and the preconcentration step. The method allowed a total sampling frequency of 28 samples/h. A good precision of the whole procedure (3.0% relative standard deviation) for a cheese sample containing 0.103 0.004 g/g Cd (dry mass), a high enrichment factor (20.5), and detection and quantification limits of 0.014 and 0.067 g/g, respectively, for a 60 mg of sample were obtained with this methodology. The method was successfully applied to the determination of trace amounts of cadmium in solid and semisolid milk products, such as cheese and yogurt samples.

Ultrasound assisted extraction for the determination of mercury in sediment samples employing cold vapour atomic absorption spectrometry

2016 ◽  
Vol 8 (35) ◽  
pp. 6554-6559 ◽  
Author(s):  
Danilo J. Leao ◽  
Mario M. Silva Junior ◽  
Jucelino B. Silva Junior ◽  
Daiane A. F. de Oliveira ◽  
Antonio F. S. Queiroz ◽  
...  
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Extraction Procedure ◽  
Absorption Spectrometry ◽  
Ultrasound Assisted Extraction ◽  
Sediment Samples ◽  
Assisted Extraction ◽  
Cold Vapour ◽  
Ultrasound Assisted

An extraction procedure involving ultrasound assisted radiation was proposed for the determination of mercury in river sediment samples using cold vapour atomic absorption spectrometry (CV AAS).

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