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  • 1
    Publication Date: 2024-04-11
    Description: The validation of the Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD) was carried out. In the first, a potassium acid phthalate standard and a spectrophotometric detection method were used, and for the second, the reading of samples was implemented by membrane electrode, a standard glutamic acid-glucose solution and incubation for 5 days at 20 ± 1ºC. Parameters were determined as linearity, precision, accuracy, sensitivity, limit of detection and quantification. It was demonstrated through experimental design and statistical procedures that methods can be used with sensitivity and confidence. Detection and quantification limits of 46.2 and 100 mg/L for COD and 2.78 and 4.71 mg / L for BOD were reached. In both tests a coefficient of variation for repeatability and reproducibility between 0.001 - 0.055% and 0.001 - 0.022% was evidenced; in accuracy, error and recovery percentages were obtained between 0.04 - 3.39% and 95.0 and 103% respectively.
    Description: Published
    Description: Se realizó la validación de la Demanda Química de Oxígeno (DQO) y Demanda Bioquímica de Oxígeno (DBO). En la primera se utilizó estándar de ftalato ácido de potasio y un método de detección espectrofotométrico y para la segunda, se implementó la lectura de muestras por electrodo de membrana, una solución estándar de glucosa-ácido glutámico e incubación por cinco días a 20±1ºC. Se determinaron parámetros como linealidad, precisión, exactitud, sensibilidad, límite de detección y cuantificación. Se demostró mediante el diseño experimental y los procedimientos estadísticos que se pueden emplear los métodos con sensibilidad y confianza. Se alcanzaron límites de detección y cuantificación de 46.2 y 100 mg/L para DQO y 2.78 y 4.71 mg/L para DBO. En ambas pruebas se evidenció un coeficiente de variación para repetibilidad y reproducibilidad entre el 0.001 - 0.055% y 0.001 – 0.022%; en la exactitud se obtuvieron porcentajes de error y recuperación entre el 0.04 – 3.39% y 95.0 y 103% respectivamente.
    Keywords: Agua residual ; Biodegradabilidad ; Calidad de agua ; Método de validación ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TQ Environmental science, engineering and technology::TQS Sanitary and municipal engineering::TQSR Waste treatment and disposal
    Language: Spanish
    Format: application/pdf
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