Validación de métodos analíticos para: DBO, DQO, nitritos, sólidos totales, cloruros y dureza total para análisis de aguas naturales, aguas de consumo humano y aguas residuales en el laboratorio de ingeniería ambiental (Laboratorios UTPL)

Abstract

The methodology of this research is mainly based on the use of standardized methods published in Standard Methods 2012, was used to validate the Eurachem Guide as reference. A colorimetric method was used for testing COD and nitrites, which used a spectrophotometer DR-800 Hach, likewise for total hardness and chloride was resorted volumetric methods to in which color change in the sample showed the completion of the degree, for total solids was applied a gravimetric method in which water evaporates in the sample and by difference in weights is obtained the amount of solids in the sample, and to BOD were available a respirometric method, using OxiTop team VELP brand. The validation process as the development of the analytical procedure, were performed in order to comply with the technical requirements specified in ISO / IEC: 17025 for the Accreditation of Laboratories UTPL.