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Artículo

Eco-friendly sonoluminescent determination of free glycerol in biodiesel samples.

Diniz, Paulo Henrique Gonçalves Dias; Pistonesi, Marcelo Fabian; Araújo, Mario César Ugulino de; Fernández Band, Beatriz SusanaIcon
Fecha de publicación: 04/2013
Editorial: Elsevier
Revista: Talanta
ISSN: 0039-9140
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Química Analítica

Resumen

This paper proposes a flow-batch methodology for the determination of free glycerol in biodiesel that is notably eco-friendly, since non-chemical reagents are used. Deionized water (the solvent) was used alone for glycerol (sample) extractions from the biodiesel. The same water was used to generate water-cavitation sonoluminescence signals, which were modulated by the quenching effect associated with the amount of extracted glycerol. The necessarily reproducible signal generation was achieved by using a simple and inexpensive piezoelectric device. A linear response was observed for glycerol within the 0.001–100 mg/L range, equivalent to 0.004–400 mg/kg free glycerol in biodiesel. The lowest measurable concentration of free glycerol was estimated at 1.0 µg/L. The selectivity of the proposed method was confirmed by comparing the shape and retention of both real and calibration samples to standard solution chromatograms, presenting no peaks other than glycerol. All samples (after extraction) are greatly diluted; this minimizes (toward non-detectability) potential interference effects. The methodology was successfully applied to biodiesel analysis at a high sampling rate, with neither reagent nor solvent (other than water), and with minimum waste generation. The results agreed with the reference method (ASTM D6584-07), at a 95% confidence level.
Palabras clave: Flow Batch , Glycerol , Online Extraction , Sonoluminescence
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/5417
URL: http://www.sciencedirect.com/science/article/pii/S0039914013002919
DOI: http://dx.doi.org/ 10.1016/j.talanta.2013.04.009
DOI: http://dx.doi.org/10.1016/j.talanta.2013.04.009
Colecciones
Articulos(CCT - BAHIA BLANCA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - BAHIA BLANCA
Articulos(INQUISUR)
Articulos de INST.DE QUIMICA DEL SUR
Citación
Diniz, Paulo Henrique Gonçalves Dias ; Pistonesi, Marcelo Fabian; Araújo, Mario César Ugulino de ; Fernández Band, Beatriz Susana; Eco-friendly sonoluminescent determination of free glycerol in biodiesel samples.; Elsevier; Talanta; 114; 4-2013; 38-42
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