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- W1963670137 abstract "The application of capillary electrophoresis (CE) in combination with indirect UV detection for the qualitative and quantitative analysis of synthetic low-molecular-mass heparin fragments, at low pH, is described. It is demonstrated that, in contrast to direct UV detection, with indirect UV detection the signal obtained for various synthetic heparin pentasaccharides is nearly independent of their molecular structure. Moreover, the sensitivity of indirect UV detection is at least one order of magnitude higher than that of direct UV detection. CE-indirect UV detection for the qualitative and quantitative analysis of low-molecular-mass glycosaminoglycans was achieved by using 5 mM 5-sulphosalisylic acid, pH 3 or 5 mM 1,2,4-tricarboxybenzoic acid, pH 3.5 as electrophoresis buffer and chromophore. The technique is exemplified by the analysis of three pharmaceutical preparations of synthetic heparin pentasaccharides. The method employing indirect UV detection was validated with respect to repeatability, limit of detection, limit of quantitation, linearity, accuracy and ruggedness. In the indirect detection mode, the limit of detection for synthetic pentasaccharides is below 5 fmol, whereas the limit of quantitation is about 25 fmol. The method shows excellent repeatability and is linear in the femtomole-picomole range. Finally, it is demonstrated that the method is suitable for the analysis of various types of glycosaminoglycans." @default.
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- W1963670137 date "1994-08-01" @default.
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- W1963670137 title "Indirect UV detection as a non-selective detection method in the qualitative and quantitative analysis of heparin fragments by high-performance capillary electrophoresis" @default.
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- W1963670137 doi "https://doi.org/10.1016/0021-9673(94)87085-3" @default.
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