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Hybrid Petroleum Institute - Absorción atómica

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Espectroscopía de absorción atómica

 

La técnica de absorción atómica en flama funciona de la siguiente manera:

1. La muestra en forma líquida es aspirada a través de un tubo capilar y conducida a un nebulizador donde ésta se desintegra y forma un rocío o pequeñas gotas de líquido.
2. Las gotas formadas son conducidas a una flama, donde se produce una serie de eventos que originan la formación de átomos. Estos átomos absorben cualitativamente la radiación emitida por la lámpara y la cantidad de radiación absorbida está en función de su concentración.
3. La señal de la lámpara una vez que pasa por la flama llega a un monocromador, que tiene como finalidad el discriminar todas las señales que acompañan la línea de interés.
4. Esta señal de radiación electromagnética llega a un detector o transductor y pasa a un amplificador y por último a un sistema de lectura en el cual se puede saber la composición de cada elemento que forma la muestra.