No full-text available
To read the full-text of this research,
you can request a copy directly from the authors.
Concentración de metanol en algunas bebidas alcohólicas comercializadas en Venezuela por medio de la técnica GC-FID
Abstract
Gas chromatography technique with flame ionization detector (GC-FID) has been employed for the quantification of methanol in diverse alcoholic drinks of legal (Cocuy, Superior and Antioqueño) and clandestine (Miche, Chuchuguaza and Cacique Arco de Palo) sale in Venezuela by using the internal standard method. Additionally, the ethanol content was quantified to validate the analysis by direct comparison with the value reported for the commercially available Cocuy. The methanol concentration was found between 76.8 and 2456.8 ppm. According to these results, the methanol concentration in 44% of the samples analyzed exceeds the permitted limit (250 ppm) indicated in the Venezuelan legal regulation COVENIN 3362-2001.
The optimization of processes for the production of fruit distillates is essential to ensure high product quality, comply with current regulations, and promote the development of the agro-industrial sector. The objective of this study was to evaluate the physicochemical properties of a mango distillate (Mangifera indica L.), varieties Kent and Alphonso, in order to optimize its production process, the fruits underwent controlled fermentation and subsequent distillation, during which volatile compounds and heavy metals were analyzed. The results showed significant differences between both varieties in terms of the concentration of ethyl acetate and furfural, which influence the sensory profile of the distillate. Methanol concentrations and other harmful compounds remained within regulatory limits. However, the copper concentration exceeded the limit allowed by the Peruvian Technical Standard (5 mg.L-1), while zinc levels remained within safe parameters according to the WHO. This study demonstrates that, with adjustments in process control, mango distillate has the potential to be a high sensory quality product suitable for commercialization.
A number of solid organic compounds, mostly aromatic hydrocarbons, have been investigated for use as internal standards in quantitative GC. Retention times at various temperatures on five commonly used columns have been determined. The data obtained have proven useful for choosing an internal standard when needed for the determination of a new drug by GC.
Clinical observations on 10 cases of methanol poisoning, with particular reference to ocular manifestations, are reported. Four patients stated that they had blurring of vision, one of these also had a temporary loss of the lower parts of the visual fields and another one visual hallucinations. Hyperaemia or oedema of the optic discs were found in 5 patients. Two of the patients died, another was severely ill and suffered from impaired vision for a long period of time afterwards. In none of the surviving patients detectable remaining damage to the retina could be revealed by recording the a- and the b-waves of the electroretinogram. Recording of the visual evoked responses showed that one patient had transient subnormal amplitudes in one eye. However, on follow-up registrations all of the patients had values within normal limits. The results of the investigation show a considerable individual variation in susceptibility to methanol poisoning.
Tesis para obtener el título de Licenciado en Ciencias Químicas. Facultad de Ciencias Naturales y Matemática
- K Rodas
K Rodas. Determinación de metanol en bebidas alcohólicas por
cromatografía de gases. Tesis para obtener el título de
Licenciado en Ciencias Químicas. Facultad de Ciencias
Naturales y Matemática. Universidad de el Salvador. Ciudad
Universitaria, San Salvador (El Salvador). 75 pp. (2008).
Determinación de metanol en bebidas alcohólicas fermentadas tradicionales y populares de mayor consumo en dos regiones de la República de Guatemala por cromatografía de gases. Tesis para obtener el título de Química Farmacéutica
- L Sánchez
L Sánchez. Determinación de metanol en bebidas alcohólicas
fermentadas tradicionales y populares de mayor consumo en dos
regiones de la República de Guatemala por cromatografía de
gases. Tesis para obtener el título de Química Farmacéutica).
Cuantificación del contenido de metanol en tres bebidas alcohólicas tradicionales producidas, en diferentes localidades en el Canton Echeandia Provincia Bolívar. Tesis para obtener el título de Ingeniero Agroindustrial
- Y Cuenca
- Collay
Y Cuenca, L Collay. Cuantificación del contenido de metanol en
tres bebidas alcohólicas tradicionales producidas, en diferentes
localidades en el Canton Echeandia Provincia Bolívar. Tesis para
obtener el título de Ingeniero Agroindustrial. Facultad de
Ciencias Agropecuarias, Recursos Naturales y del Ambiente.
Estandarización de los parámetros de validación de un método analítico para cuantificar la concentración de metanol en bebidas alcohólicas utilizando cromatografía de gases. Tesis para obtener el título de Ingeniero Bioquímico
- D Luna
D Luna. Estandarización de los parámetros de validación de un
método analítico para cuantificar la concentración de metanol en
bebidas alcohólicas utilizando cromatografía de gases. Tesis para
obtener el título de Ingeniero Bioquímico. Facultad de Ciencias
e Ingeniería de Alimentos. Universidad Técnica de Ambato.
Ambato (Ecuador). 90 pp. (2012).
Norma venezolana Cocuy Pecayero
- Y Adan
- S Acosta
- M Aguilar
- M Díaz
- M Espinoza
- G Espinoza
- P Gonzalez
- Oropeza
- Rosas
Y Adan, S Acosta, S Aguilar, M Díaz, M Espinoza, M Espinoza,
G Gonzalez, P Oropeza, L Rosas. Norma venezolana Cocuy
Pecayero, COVENIN 3662:2001. FONDONORMA. Caracas
Venezuela. 1-9 (2001).
Alcohol y atención primaria de la salud: informaciones clínicas básicas para la identificación y el manejo de riesgos y problemas
- P Anderson
- Gual
- Colon
P Anderson, A Gual, J Colon. Alcohol y atención primaria de la
salud: informaciones clínicas básicas para la identificación y el
manejo de riesgos y problemas. Washington, D.C.: Organización
Panamericana de la Salud © (2008).