A method of separating free target analyte from protein-bound target analyte is described. Such can include obtaining an aqueous sample containing a target analyte in a free form (free target analyte) and the target analyte in a protein-bound form (protein-bound target analyte), passing the aqueous sample through a size exclusion chromatography matrix with a molecular weight cut off sufficient to allow the free target analyte to permeate into pores of the size exclusion chromatography matrix and exclude the protein-bound target analyte, whereupon the free target analyte adheres to and is immobilized by the size exclusion chromatography matrix and the protein-bound target analyte does not adhere to by the size exclusion chromatography matrix, separating the free target analyte from the protein-bound analyte by removing the protein-bound target analyte from the size exclusion chromatography matrix, and eluting the free target analyte from the size exclusion chromatography matrix with an organic solvent.
描述了一种分离游离目标分析物和蛋白结合目标分析物的方法。这种方法可以包括获得含有游离形式的目标分析物(游离目标分析物)和蛋白结合形式的目标分析物(蛋白结合目标分析物)的
水样,将
水样通过尺寸排阻层析基质,该基质的分子量截距足以使游离目标分析物渗透到尺寸排阻层析基质的孔隙中,并排除蛋白结合目标分析物、在此情况下,游离的目标分析物附着在尺寸排阻色谱基质上并被尺寸排阻色谱基质固定,而蛋白结合的目标分析物不附着在尺寸排阻色谱基质上,通过从尺寸排阻色谱基质中去除蛋白结合的目标分析物来分离游离的目标分析物和蛋白结合的分析物,并用有机溶剂从尺寸排阻色谱基质中洗脱游离的目标分析物。