Determination of copper in sugarcane spirit by flame atomic absorption spectrometry using a ternary solvent mixture (water-ethanol-acetone)

Souza, João Carlos de; Toci, Aline Theodoro; Beluomini, Maísa Azevedo; Eiras, Sebastião de Paula

doi:10.26850/1678-4618eqj.v42.1.2017.p33-39

Cited by 4 publications

(3 citation statements)

References 27 publications

(27 reference statements)

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“…Gibbs–Rozemboon ternary diagram for biodiesel‐propan‐1‐ol‐water (KCl 0.1 mol L −1 ) solvent system was constructed (by the phase titration technique) aiming at setting composition ranges for complete miscibility , . Pairs of miscible solvents were titrated with a third solvent at room temperature to the point of opalescence, characterized by the appearance of an emulsion in the titrated medium .…”

Section: Methodsmentioning

confidence: 99%

Study of the Electrochemical Behavior of Biodiesel Microemulsion

et al. 2017

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Microemulsions have become a widely employed technique for the control of biodiesel quality but are still poorly understood as regard to their electrochemical behavior. In this work, we report the fundamental importance associated with the knowledge of electrochemical behavior of microemulsions composed of water in the presence of a supporting electrolyte, soybean biodiesel and propan‐1‐ol as consolute, along with the ferrocyanide–ferricyanide redox system applied as probe. The voltammetric results showed that for different compositions of microemulsions, variation in peak currents and change in system reversibility as well as in the electron transfer process were clearly noted. Furthermore, through the study of the diffusion coefficient, three different types of microemulsions including Oil/Water, Bicontinuous, and Water/Oil were successfully identified. Electrochemical impedance spectroscopy studies were also carried out aiming at obtaining more information regarding the electrode/solution interface. All the studies performed demonstrated that different types of microemulsions were formed upon exerting a direct influence on the electrochemical behavior of the redox probe. These results, in essence, point to the possibility of choosing a more suitable and advantageous microemulsion type for the development of an analytical method, as in the case, for example, of the microemulsions ME‐2 and ME‐3 which presented high voltammetric response in redox probe oxidation.

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Section: Methodsmentioning

confidence: 99%

Study of the Electrochemical Behavior of Biodiesel Microemulsion

et al. 2017

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“…This raises the need for devising and implementing increasingly rigorous, technologically advanced vinification processes aimed at obtaining standardized wine products with proven quality in terms of physicochemical and sensorial properties. In this context, the monitoring and control of the beverage through physical-chemical analysis is found to be of paramount importance (Souza et al 2016a;Souza et al 2017Souza et al , 2019.…”

Section: Introductionmentioning

confidence: 99%

Influence of vinification process over the composition of volatile compounds and sensorial characteristics of greek wines

et al. 2021

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Wine is one of the most traditional consumed alcoholic beverages in the world. Millions of wine enthusiasts worldwide duly appreciate a wine of excellent quality in terms of physicochemical and sensorial properties. Different classes of wines have different volatile compositions and sensorial properties, which can be altered, depending on the vinification process and use of additives. Among the widely employed additives in wine production is sulfite (SO 2 ). The popularity of sulfite lies in its ability to preserve the flavor and freshness of wine; however, depending on the quantity, sulfite can pose serious health risks to consumers and affect the quality of the drink. The present study evaluated and compared the compositions of volatile compounds and sensorial properties of sparkling and traditional wines (with and without SO 2 ) produced from Greek grapes 'Grechetto', 'Greco bianco' and 'Greco di tufo'. The results obtained of the composition of volatile compounds in these wines pointed to differences between SO 2 -containing, SO 2 -free and sparkling wines, with different amounts of compounds such as alcohols, esters, fatty acids, phenols and differences in sensorial properties. The 'Grechetto' wine, prepared without SO 2 , exhibited greater quality, better volatile composition, and better sensorial properties compared to the wines produced with SO 2 .

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“…The quantification of metallic specie is important for product quality control, observing the inorganic composition assurance and the presence of toxic elements to humans [5]. These determinations are routinely performed by flame atomic absorption spectrometry (F AAS), [6][7][8][9], inductively coupled plasma mass spectrometry (ICP-MS) [10], electrothermal atomic absorption spectrometry ET AAS [2,4,11,12,13] and UV-Vis spectrophotometry [14,15]. However, the energy dispersive X-ray fluorescence spectrometry (EDXRF) has not been explored for determination of inorganic species in sugar cane spirit.…”

Section: Introductionmentioning

confidence: 99%

Magnetic solid phase microextraction using CoFe2O4 nanoparticles for determination of Cu, Cd, Pb and V in sugar cane spirit samples by energy dispersive X-ray fluorescence spectrometry

Almeida¹,

Meira²,

Dias³

et al. 2019

Br J Anal Chem

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Determination of Cu, Cd, Pb and V in sugar cane spirit samples by EDXRF after preconcentration using CoFe 2 O 4 A method for the determination of Cu, Cd, Pb and V in Brazilian sugarcane spirit ("cachaça" in Brazil) using CoFe 2 O 4 nanoparticles impregnated with 1-(2-pyridylazo)-naphthol (PAN) for extraction of the metals with posterior determination by X-ray fluorescence spectrometry directly in the solid phase is described. The recommended conditions for extraction were: pH 6.0 (1.0 mol L −1 hexamethylenetetramine (HMTA)/ nitric acid buffer solution); sample volume, 25 mL; and nanoparticle mass, 100 mg. The precisions for the determination of each element, expressed as relative standard deviations (RSD) of standard solutions containing 0.20 mg L −1 of each analyte, were 1.5, 1.8, 1.2 and 2.9% (n = 10), respectively. Limits of detection of 0.032, 0.038, 0.016 and 0.028 mg L-1 were obtained for Cu, Cd, Pb and V, respectively. Addition and recovery tests were performed, and the results ranged from 97 to 115% for Cu, 85 to 115% for Cd, 85 to 99% for Pb and 85 to 110% for V. The method was successfully applied in extraction and determination of Cd, Pb, Cu and V in sugar cane spirit samples from Brazil.

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Determination of copper in sugarcane spirit by flame atomic absorption spectrometry using a ternary solvent mixture (water-ethanol-acetone)

Cited by 4 publications

References 27 publications

Study of the Electrochemical Behavior of Biodiesel Microemulsion

Study of the Electrochemical Behavior of Biodiesel Microemulsion

Influence of vinification process over the composition of volatile compounds and sensorial characteristics of greek wines

Magnetic solid phase microextraction using CoFe2O4 nanoparticles for determination of Cu, Cd, Pb and V in sugar cane spirit samples by energy dispersive X-ray fluorescence spectrometry

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