Methodology for Hg determination in honey using cloud point extraction and cold vapour-inductively coupled plasma optical emission spectrometry

2010 ◽  
Vol 2 (2) ◽  
pp. 180-185 ◽  
Author(s):  
Fernanda dos Santos Depoi ◽  
Fabrina R. S. Bentlin ◽  
Dirce Pozebon
Keyword(s):  
Cloud Point ◽  
Inductively Coupled Plasma ◽  
Cloud Point Extraction ◽  
Optical Emission ◽  
Optical Emission Spectrometry ◽  
Emission Spectrometry ◽  
Inductively Coupled ◽  
Plasma Optical Emission Spectrometry ◽  
Cold Vapour

Preconcentration of aluminum by dual-cloud point extraction and its determination by inductively coupled plasma-optical emission spectrometry

2021 ◽  
Vol 17 ◽  
Author(s):  
Wael I. Mortada ◽  
Sarah Alharthi
Keyword(s):  
Gallic Acid ◽  
Cloud Point ◽  
Inductively Coupled Plasma ◽  
Cloud Point Extraction ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Icp Oes ◽  
Inductively Coupled ◽  
Plasma Optical Emission Spectrometry ◽  
Triton X

Background: The combination of cloud point extraction (CPE) with inductively coupled plasma-optical emission spectrometry (ICP OES) is limited due to the effect of organic diluent and surfactant on the signal. Method: dual-CPE process (d-CPE) was presented for the enrichment of aluminum (Al3+), before determination by ICP OES, to exclude the effect of surfactant and organic solvent on the ICP OES signal. The analyte was firstly extracted into Triton X-114 rich phase as a gallic acid complex. In the second step, Al3+ was back extracted into an aqueous phase of HNO3 that was introduced into ICP OES. The effects of pH, concentrations of gallic acid and Triton X-114, incubation temperature and time, centrifugation conditions and the concomitant ions were evaluated. Results: The method displayed good analytical characteristics at the optimum conditions. An enrichment factor of 49.5 was achieved. The linear calibration graph was obtained from 1.0 to 1000 µg L-1 and the detection limit was 0.31 µg L-1 . The relative standard deviation was 2.3% (50 µg L-1 Al3+, n = 10). Quantitative recoveries ranging from 96.0 to 100% were obtained for spiked water and geological samples. This procedure was used efficiently for preconcentration and quantification of Al3+ in various samples by ICP OES. Conclusion: The presented procedure is simple, rapid, accurate, and safe. It can be used for the determination of Al3+ by ICP OES in samples with complicated matrices.

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