Examinando por Autor "Huamán Ñaupa, Mario Amadeo"

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    Identificación de metanol y la concentración del alcohol de 70° en las diferentes marcas comercializadas en el Mercado Central – Lima 2023
    (Universidad Privada Norbert Wiener, 2023-12-07) Huamán Ñaupa, Mario Amadeo; Félix Véliz, Luis Miguel Visitación
    This study uses a descriptive observational method, a quantitative approach, and an analytical, non-experimental descriptive design. Its objective is to evaluate the presence of methanol and the concentration of alcohol in 70° medicinal alcohol from different brands sold in the central market of Lima in August 2023. The methodology used consisted of a random probabilistic sampling of 20 one-liter samples of 70° medicinal alcohol. These were purchased from both pharmaceutical locations (Sample B: 10 samples from pharmacies and drugstores) and other commercial stores (Sample A: 10 samples from street vendors, shopping centers, and small shops). Methanol was identified using chromotropic acid as a reagent, in accordance with Peruvian Technical Standard (NTP) 211.007:2014 for sensory evaluation. Physicochemical determinations (density, pH, alcohol concentration) were conducted according to the United States Pharmacopeia (UPS) and NTP 211.007:2014. Positive results for methanol were found in 90% of samples from commercial stores and 20% of samples from pharmaceutical locations. The alcohol concentration results were all below 70°, with an average of 59° in commercial stores and 68° in pharmaceutical locations. The study concluded that a significant difference exists in the identification of methanol in 70° medicinal alcohol sold in commercial stores versus pharmaceutical locations. Similarly, there is a significant difference in the alcoholic concentration of the 70° medicinal alcohol sold in these two types of locations in Lima - Cercado, August 2023.