Determinación del contenido de nitrógeno en péptidos farmacéuticos activos
La determinación de nitrógeno y proteína total en los productos farmacéuticos se describe en las secciones 2.5.9 y 2.5.33 de la Farmacopea Europea (Ph. Eur.) (método 7) [1, 2]. En la Farmacopea de Estados Unidos (USP), la determinación de nitrógeno se describe en la sección 461 [3]. En ellas se especifican las diferentes técnicas de titulación. La Ph. Eur. usa la titulación inversa en presencia de la solución mixta del indicador rojo de metilo y la USP utiliza la titulación potenciométrica en ácido bórico.
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