The implementation of a test method ensures the analytical reliability of the test result, reason why the present paper deals with the implementation of the analytical method described in the Standard Methods 3111 D - Direct Nitrous Oxide - Acetylene Flame Method for the determination of barium in the matrix of wastewater, using an atomic absorption spectrometer. It is implementation has the approach of the system of management of quality of testing laboratories ISO/IEC 17025: 2005, being evaluated statistical parameters: accuracy (trueness and precision), method detection limit, quantification limit, working range, linearity, sensitivity and robustness. 

This paper defines the criterion of quality assurance results for the determination of barium by the method Standard Methods 3111 D - Direct Nitrous Oxide - Acetylene Flame Method by atomic absorption spectrometry, estimated for individuals Shewhart control limits for accuracy and precision parameters. The study was conducted for wastewater 

This paper aims to estimate the measurement uncertainty of the method Standard Methods 3111 D - Direct Nitrous Oxide - Acetylene Flame Method for the determination of barium in the wastewater matrix by atomic absorption spectrometry, using a model estimation uncertainty factors as requested by the guideline INDECOPI-acr-09 CRT-D, low approach quality management system of testing laboratories ISO / IEC 17025:2005. 

El presente trabajo define como criterio de aseguramiento de calidad de resultados, para la determinación de Bario por el método Standard Methods 3111 D - Direct Nitrous Oxide - Acetylene Flame Method por espectrometría de absorción atómica, los límites de control estimados de cartas de control individuales Shewhart para los parámetros de veracidad y precisión.El estudio se realizó enagua residual.

El presente trabajo tiene como objetivo estimar la incertidumbre de medición del método Standard Methods 3111 D –Direct Nitrous Oxide-Acetylene Flame Method para la determinación de bario en la matriz de agua residual por espectrometría de absorción atómica, utilizando un modelo de estimación de incertidumbre por factores de acuerdo a lo solicitado por la directriz de INDECOPI CRT-acr-09-D, bajo en enfoque del sistema de gestión de calidad de laboratorios de ensayos ISO/IEC 17025:2005.

La implementación de un método de ensayo asegura la confiabilidad analítica del resultado de ensayo, razón por la cual el presente trabajo aborda la implementación del método analítico descrito en el Standard Methods 3111 D - Direct Nitrous Oxide - Acetylene Flame Method para la determinación de bario, en la matriz de agua residual, utilizando un espectrómetro de absorción atómica. Está implementación tiene el enfoque del sistema de gestión de calidad de laboratorios de ensayo ISO/IEC 17025:2005, siendo los parámetros estadísticos evaluados: la exactitud (veracidad y precisión), límite de detección del método, límite de cuantificación, rango de trabajo, linealidad, sensibilidad y robustez.

The implementation of a test method ensures the analytical reliability of the test result, reason why the present paper deals with the implementation of the analytical method described in the Standard Methods 3111 D - Direct Nitrous Oxide - Acetylene Flame Method for the determination of barium in the matrix of wastewater, using an atomic absorption spectrometer. It is implementation has the approach of the system of management of quality of testing laboratories ISO/IEC 17025: 2005, being evaluated statistical parameters: accuracy (trueness and precision), method detection limit, quantification limit, working range, linearity, sensitivity and robustness. 

This paper defines the criterion of quality assurance results for the determination of barium by the method Standard Methods 3111 D - Direct Nitrous Oxide - Acetylene Flame Method by atomic absorption spectrometry, estimated for individuals Shewhart control limits for accuracy and precision parameters. The study was conducted for wastewater.

This paper aims to estimate the measurement uncertainty of the method Standard Methods 3111 D - Direct Nitrous Oxide - Acetylene Flame Method for the determination of barium in the wastewater matrix by atomic absorption spectrometry, using a model estimation uncertainty factors as requested by the guideline INDECOPI-acr-09 CRT-D, low approach quality management system of testing laboratories ISO / IEC 17025:2005.