In chemical analysis, matrix refers to the components of a sample other than the analyte of interest. The matrix can have a considerable effect on the way the analysis is conducted and the quality of the results are obtained; such effects are called matrix effects. For example, the ionic strength of the solution can have an effect on the activity coefficients of the analytes. The most common approach for accounting for matrix effects is to build a calibration curve using standard samples with known analyte concentration and which try to approximate the matrix of the sample as much as possible. This is especially important for solid samples where there is a strong matrix influence. In cases with complex or unknown matrices, the standard addition method can be used. In this technique, the re

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  • En el análisis químico, la matriz se refiere a los componentes de una muestra que no sea el analito​ de interés. La matriz puede tener un efecto considerable en la forma en que se realiza el análisis y la calidad de los resultados obtenidos; tales efectos son llamados efectos de matriz.​ Por ejemplo, la fuerza iónica de la solución puede tener un efecto sobre los coeficientes de actividad de los analitos.​​ El enfoque más común para contabilizar los efectos de la matriz es construir una curva de calibración utilizando muestras estándar con una concentración de analito conocida y que intente aproximar la matriz de la muestra tanto como sea posible.​ Esto es especialmente importante para muestras sólidas donde hay una fuerte influencia de la matriz.​ En casos con matrices complejas o desconocidas, se puede utilizar el método de adición estándar.​ En esta técnica, la respuesta de la muestra se mide y se registra, por ejemplo, utilizando un electrodo selectivo para el analito. Luego, se agrega un pequeño volumen de solución estándar y la respuesta se mide nuevamente. Idealmente, la adición estándar debería aumentar la concentración de analito en un factor de 1.5 a 3, y se deberían promediar varias adiciones. El volumen de la solución estándar debe ser lo suficientemente pequeño como para perturbar lo menos posible la matriz. (es)
  • In chimica analitica la matrice o matrice del campione è quell'insieme di composti che formano il campione tranne l'analita. Una matrice può contenere o meno interferente, nel qual caso, se possibile, è meglio separarli o estrarre l'analita. L'effetto di interferenza della matrice sull'analisi chimica dell'analita è chiamato effetto matrice. (it)
  • In chemical analysis, matrix refers to the components of a sample other than the analyte of interest. The matrix can have a considerable effect on the way the analysis is conducted and the quality of the results are obtained; such effects are called matrix effects. For example, the ionic strength of the solution can have an effect on the activity coefficients of the analytes. The most common approach for accounting for matrix effects is to build a calibration curve using standard samples with known analyte concentration and which try to approximate the matrix of the sample as much as possible. This is especially important for solid samples where there is a strong matrix influence. In cases with complex or unknown matrices, the standard addition method can be used. In this technique, the response of the sample is measured and recorded, for example, using an electrode selective for the analyte. Then, a small volume of standard solution is added and the response is measured again. Ideally, the standard addition should increase the analyte concentration by a factor of 1.5 to 3, and several additions should be averaged. The volume of standard solution should be small enough to disturb the matrix as little as possible. (en)
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  • In chimica analitica la matrice o matrice del campione è quell'insieme di composti che formano il campione tranne l'analita. Una matrice può contenere o meno interferente, nel qual caso, se possibile, è meglio separarli o estrarre l'analita. L'effetto di interferenza della matrice sull'analisi chimica dell'analita è chiamato effetto matrice. (it)
  • In chemical analysis, matrix refers to the components of a sample other than the analyte of interest. The matrix can have a considerable effect on the way the analysis is conducted and the quality of the results are obtained; such effects are called matrix effects. For example, the ionic strength of the solution can have an effect on the activity coefficients of the analytes. The most common approach for accounting for matrix effects is to build a calibration curve using standard samples with known analyte concentration and which try to approximate the matrix of the sample as much as possible. This is especially important for solid samples where there is a strong matrix influence. In cases with complex or unknown matrices, the standard addition method can be used. In this technique, the re (en)
  • En el análisis químico, la matriz se refiere a los componentes de una muestra que no sea el analito​ de interés. La matriz puede tener un efecto considerable en la forma en que se realiza el análisis y la calidad de los resultados obtenidos; tales efectos son llamados efectos de matriz.​ Por ejemplo, la fuerza iónica de la solución puede tener un efecto sobre los coeficientes de actividad de los analitos.​​ El enfoque más común para contabilizar los efectos de la matriz es construir una curva de calibración utilizando muestras estándar con una concentración de analito conocida y que intente aproximar la matriz de la muestra tanto como sea posible.​ Esto es especialmente importante para muestras sólidas donde hay una fuerte influencia de la matriz.​ En casos con matrices complejas o descono (es)
rdfs:label
  • Matrix (chemical analysis) (en)
  • Matriz (análisis químico) (es)
  • Matrice (chimica) (it)
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