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- W1574108270 abstract "Se compararon dos procedimientos analiticos para la determinacion del contenido de carbono organico, con el objeto de sustituir la valoracion por la tecnica colorimetrica, en el metodo de combustion humeda de Walkley-Black. La valoracion esta sujeta a errores operacionales debido a la dificultad en la deteccion del punto final. Por su parte la tecnica colorimetrica tiene la ventaja de un menor consumo de reactivos y de reducir las fuentes de error. Se escogieron tres muestras de suelo con contenido de materia organica bajo, medio y alto. Se efectuaron tres repeticiones diarias por muestra, durante treinta dias no continuos. Los parametros estadisticos: media, coeficiente de variacion, coeficiente de correlacion y prueba de media, aplicados a los resultados obtenidos, permitieron detectar que no existen diferencias significativas entre procedimientos. Estos resultados permiten concluir que el metodo de la valoracion puede sustituirse por el metodo colorimetrico. Palabras Claves: Materia organica, analisis cuantitativo, colorimetria, valoracion. Abstract Two analytical procedures to determine the soil organic car-bon content were compared in order to decide whether the titration technique could be changed by the colorimetric one in the wet combustion method of Walkley-Black. The titration is always dependent on the final point of the indicator. On the other hand the colorimetric technique consumes less reactive and comprises fewer error sources than the titration. Three soil samples were taken with high, medium and low organic matter content. Three daily repetitions for sample were performed for thirty no continuous days. The statistical parameters: mean, variation coefficient, correlation coefficient and mean test were applied to the final results. There was no significant difference between techniques. In conclusion, the titration technique can be changed for the colorimeter technique. Key Words: Organic matter, quantitative analysis, colorimetry, titration." @default.
- W1574108270 created "2016-06-24" @default.
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- W1574108270 date "2011-11-09" @default.
- W1574108270 modified "2023-09-24" @default.
- W1574108270 title "DETERMINACIÓN DE CARBONO ORGÁNICO EN MUESTRAS DE SUELOS MEDIANTE DOS PROCEDIMIENTOS ANALÍTICOS" @default.
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