Ultrasound-assisted extraction of Pb, Cd, Cr, Mn, Fe, Cu, Zn from edible oils with tetramethylammonium hydroxide and EDTA followed by determination using graphite furnace atomic absorption spectrometer

2019 ◽  
Vol 294 ◽  
pp. 384-389 ◽  
Author(s):  
R. Manjusha ◽  
R. Shekhar ◽  
Sunil Jai Kumar
Keyword(s):  
Atomic Absorption ◽  
Edible Oils ◽  
Graphite Furnace ◽  
Tetramethylammonium Hydroxide ◽  
Atomic Absorption Spectrometer ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Graphite Furnace Atomic Absorption ◽  
Ultrasound Assisted ◽  
Absorption Spectrometer

Optimization of Ultrasound-Assisted Extraction of Cr, Cu, Zn, Cd, and Pb from Sediment, Followed by FAAS and GFAAS Analysis

2016 ◽  
Vol 99 (1) ◽  
pp. 252-259 ◽  
Author(s):  
Aparecida M S Mimura ◽  
Marcone A L Oliveira ◽  
Virginia S T Ciminelli ◽  
Julio C J Silva
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Matrix Effects ◽  
Graphite Furnace ◽  
Absorption Spectrometry ◽  
Ultrasound Assisted Extraction ◽  
Flame Atomic Absorption ◽  
Assisted Extraction ◽  
Graphite Furnace Atomic Absorption ◽  
Standard Additions

Abstract An ultrasound method for simultaneous extraction of Cr, Cu, Zn, Cd, and Pb from sediment, and determination by flame atomic absorption spectrometry (FAAS) and graphite furnace atomic absorption spectrometry (GFAAS) was proposed. The experimental results obtained using analytical curves and the method of standard additions agreed at a confidence level of 95% for all the analytes, as determined by FAAS and GFAAS, indicating no significant matrix effects. Recoveries ranged from 80.1 to 93.7% (certified reference material) and from 89 to 107% (spike tests). The LOD and LOQ results from the method were consistent with the techniques used (FAAS and GFAAS), with high analytical throughput. The proposed method was then used to determine Cr, Cu, Zn, Cd, and Pb in river sediment samples from Rio Doce, Minas Gerais, Brazil. The results indicated levels below those permitted by Brazilian legislation for all the analytes, with the exception of Cr.

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