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Artículo

Determination of the Band Broadening Function in Size Exclusion Chromatography with Light-scattering Detection

Yossen, Mariana MatildeIcon ; Vega, Jorge RubenIcon ; Chang, Taihyun; Meira, Gregorio RaulIcon
Fecha de publicación: 01/2012
Editorial: Taylor
Revista: Journal Of Liquid Chromatography And Related Technologies
ISSN: 1082-6076
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Ingeniería Química

Resumen

This work describes the determination of the band broadening function (BBF) in a size exclusion chromatograph fitted with 2 mixed-gel columns, a light scattering (LS) detector, and a differential refractometer (DR). The raw data were the chromatograms of 4 narrow polystyrene standards. First, the interdetector volume shift was indirectly estimated from its upper and lower limiting values. Then, for each of the standards, their ‘‘local’’ BBFs were estimated by application of an existing theoretical method. Each local BBF is an assumed elution-volume invariant in the narrow ranges of the analyzed standards and is represented by an exponentially-modified Gaussian of standard deviation rBB and exponential decay sBB. Finally, a ‘‘global’’ BBF (valid for the complete fractionation range) was interpolated from the local BBF parameters. For increasing elution volumes, the global BBF exhibits an increasing rBB and a decreasing sBB. In addition, the asymmetry factor [sBB=rBB] and the global variance [r2 BB þ s2 BB] both decrease with elution volume.
Palabras clave: Band Broadening , Differential Refractometer And Light Scattering Detector , Interdetector Volume , Hplc And Sec
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/18790
URL: http://www.tandfonline.com/doi/abs/10.1080/10826076.2011.597061
DOI: http://dx.doi.org/10.1080/10826076.2011.597061
Colecciones
Articulos(INTEC)
Articulos de INST.DE DES.TECNOL.PARA LA IND.QUIMICA (I)
Citación
Yossen, Mariana Matilde; Vega, Jorge Ruben; Chang, Taihyun; Meira, Gregorio Raul; Determination of the Band Broadening Function in Size Exclusion Chromatography with Light-scattering Detection; Taylor; Journal Of Liquid Chromatography And Related Technologies; 35; 1; 1-2012; 79-94
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