Continuous flow system for lead determination by faas in spirituous beverages with solid phase extraction and on-line copper removal

Peña, Yaneira Petit de; Paredes, Boris; Rondón, Wendy; Burguera, M.; Burguera, J.L.; Rondón, Carlos; Carrero, Pablo; Capote, Tarcisio

doi:10.1016/j.talanta.2004.05.053

Cited by 24 publications

(2 citation statements)

References 17 publications

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“…La legislación colombiana no regula el contenido de plomo en aguardientes, sin embargo, en Europa se establece que el nivel de plomo permitido es de 0,3mg/L, en cambio en EE.UU y Canadá es de 0,1 a 0,2mg/L respectivamente (Petit de Peña et al, 2004), por lo cual los niveles de plomo para el ñeque de los corregimientos y municipios del Departamento de Bolívar están fuera de los parámetros de calidad internacionales. Nuevamente este es un dato preocupante, ya que la presencia de plomo en estas concentraciones es inaceptable debido a que estos metales pesados impiden la absorción de vitaminas y de otros minerales en el organismo (López-Naranjo et al, 2013).…”

Section: Análisis De Resultadosunclassified

Caracterización del Ñeque, Bebida Alcohólica elaborada Artesanalmente en la Costa Caribe Colombiana

2015

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El objetivo de la presente investigación fue determinar el contenido de etanol, metanol y metales pesados en el ñeque, una bebida alcohólica a base de caña de azúcar producida artesanalmente en la Costa Caribe colombiana. Para la elaboración de ñeque se disuelve panela (zumo de caña de azúcar) en agua hasta llegar a una densidad de un grado Baumé. Esta solución se fermenta aproximadamente siete días, obteniendo un mosto. Luego se destila obteniéndose como destilado la bebida alcohólica. El contenido de etanol y metanol se determinó por cromatografía de gases. La identificación de metales se utilizó mediante la metodología de plasma acoplado inductivamente a espectroscopia de emisión atómica. Las concentraciones de etanol, cobre y plomo están por sobre los límites permisibles para este tipo de bebidas alcohólicas.

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Section: Análisis De Resultadosunclassified

Caracterización del Ñeque, Bebida Alcohólica elaborada Artesanalmente en la Costa Caribe Colombiana

2015

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“…Amberlites (XAD) [13,14], silica gel [15,16], bio-adsorbents [17,18], carbon nanotubes [19,20] and zeolites [21,22] have been used for preconcentration of trace metals [23], after complex formation of metal to facilitate retention on the adsorbent material., such as 8-hidroquinoline [24], APDC [21], 1-(2-Pyridylazo)-2-naphthol (PAN) [25], ammonium diethyldithiophosphate (DDTP) [26], for ion exchange and/or complexation of metal ions has been applied to extraction-complexation of metal ions. Petit et al [27] developed an on-line FI system for the preconcentration of Cu 2+ onto a mini-column packed with synthetic zeolites; APDC was used to form neutral chelate of the metal, which is then eluted with MIBK and determined by FAAS. Preconcentration factors of copper ranging from 35 -125 for Na-LTA and 30 -65 for Na-FAU were readily achieved, related to the direct introduction of aqueous solutions into an atomic absorption spectrometer.…”

Section: Introductionmentioning

confidence: 99%

Linde Type a Zeolite and Type Y Faujasite as a Solid-Phase for Lead, Cadmium, Nickel and Cobalt Preconcentration and Determination Using a Flow Injection System Coupled to Flame Atomic Absorption Spectrometry

Peña¹,

Rondón²

2013

AJAC

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In this work, a flow injection analysis (FIA) method for the trace determination of lead, cadmium, nickel and cobalt in natural waters by formation of neutral chelates with ammonium pyrrolidine dithiocarbamate (APDC) was developed. The neutral chelates formed was retained in a mini-column packed with Linde type A zeolite (LTA) and type Y Faujasite zeolite (FAU) and then eluted with methyl isobutyl ketone (MIBK) to flame atomic absorption spectrometry (EAA) for its detection. Physicochemical characterization of this zeolite was carried out by Fourier Transform infrared spectroscopy and attenuated total reflectance (FTIR and IR-ATR), scanning electron microscopy and energy dispersive X-ray microanalysis (SEM-EDX) and X-ray power diffraction (XRD). Then, a FIA configuration was used with a column preconcentration system coupled to the detection system at room temperature (22?C). The detection limit and the relative standard deviation for 5 determinations of different solutions of Pb²⁺, Co²⁺, Ni²⁺and Cd²⁺ for FAU and LTA zeolite were calculated. The sampling frequency ranged from 18-35 h^-¹ and preconcentration factors from 21-250 were achieved, for a sample volume of 6 mL using 20 mg of sorbents, indicating a high retention of the analytes on the zeolites material. The recoveries obtained in natural waters samples were close to 100% for all ions metal using synthetic zeolites, confirming the applicability of the method. The isotherm models of Langmuir, Scatchard, Freundlich and Dubinin-Radushkevich were used to study the equilibrium data, indicating that successfully followed the Freundlich and Dubinin-Radushkevich (D-R) isotherms at low metal ion concentration. The Freundlich parameter n varied between 0.35-1.01, whereas D-

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Voltammetric Monitoring and Speciation of Copper Ions in Italian “Grappa” with Platinum Microelectrodes

Baldo

Daniele

2006

Electroanalysis

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A linear sweep voltammetric (LSV) investigation and the anodic stripping voltammetric (ASV) detection of copper ions in ethanol-water mixtures and grappa samples are reported. The measurements are carried out by using platinum microdisk electrodes. Ethanol-water mixtures with ethanol content in the range 40 -100 vol%, commercially available and raw grappa samples having ethanol content in the above range are examined. From LSV measurements of copper (II) ions added to the samples, the formation of intermediate copper (I) soluble species, which are stabilized mainly by the naturally occurring organic compounds present in the real samples, is observed. The analysis of LSV and ASV current responses against added Cu 2þ ions provides linear trends over the concentration range 5 Â 10 À5 À 5 Â 10 À3 M and 5 Â 10 À7 À 5 Â 10 À5 M, respectively. The sensitivity depends on the ethanol content in the mixture and, as expected, it is the higher the lower the viscosity of the medium. In particular, it varies from 1.54 to 3.53 nA mM À1 and from 0.114 to 0.263 nA mM À1 for LSV and ASV measurements, respectively, upon changing the ethanol content from 40 to 100 vol%. In the same range of ethanol content, detection limits obtained by ASV vary from 0.27 to 0.15 mM, respectively. Labile or total copper contents in the grappa samples are determined by ASV measurements performed in the untreated matrices or in the samples acidified with 0.1 M HClO 4 , respectively. Finally, acidification of the samples with different amounts of HClO 4 allows also some speciation investigations to be performed.

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Continuous flow system for lead determination by faas in spirituous beverages with solid phase extraction and on-line copper removal

Cited by 24 publications

References 17 publications

Caracterización del Ñeque, Bebida Alcohólica elaborada Artesanalmente en la Costa Caribe Colombiana

Caracterización del Ñeque, Bebida Alcohólica elaborada Artesanalmente en la Costa Caribe Colombiana

Linde Type a Zeolite and Type Y Faujasite as a Solid-Phase for Lead, Cadmium, Nickel and Cobalt Preconcentration and Determination Using a Flow Injection System Coupled to Flame Atomic Absorption Spectrometry

Voltammetric Monitoring and Speciation of Copper Ions in Italian “Grappa” with Platinum Microelectrodes

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