A new method is described for the analysis of copper (Cu) containing ceruloplasmin (Cp) in human serum. The method uses immunoaffinity plus size-exclusion chromatography (SEC) to separate Cp from other proteins and from inorganic ions, with inductively coupled plasma mass spectrometry (ICP-MS) detection of 63Cu and 65Cu to identify the protein. A reference serum certified for Cp was used to est...

Study of Band Broadening occurring in Size Exclusion Chromatography (SEC) is reported using very narrow PS standards obtained and characterised by Temperature Gradient Interaction Chromatography (TGIC). Chromatograms are fitted by Exponentially Modified Gaussian functions (EMG) and mapping of band broadening is obtained for different column sets. Interpretation of the skewing of the chromatogra...

Hyphenating High Temperature High Performance Liquid Chromatography (HT-HPLC) with High Temperature Size Exclusion Chromatography (HT-SEC) (High Temperature Two Dimensional Liquid Chromatography (HT-HPLC x HT-SEC or HT 2D-LC)) leads to an isocratic elution in the second dimension, which in turn enables to use IR detector (quantitative detection) for monitoring the eluting polymers. Experimental...

High resolution HPLC techniques such as affinity chromatography (AC), ion exchange chromatography (IEC), and size exclusion chromatography (SEC) were used successfully for separations of hydrophobic plasma membrane glycoproteins. We have tested a lot of commercially available columns for IEC and SEC and performed the purification of the crude plasma membrane extract with the most suitable colum...

The use of chromatographic stationary phases or solvent modifiers to modulate diffusion properties in NMR experiments is now well established. Their use can be to improve resolution in the diffusion domain or to provide an insight into analyte-modifier interactions and hence the chromatography process. Here we extend previous work using size-exclusion chromatographic (SEC) stationary phases to ...

Size exclusion chromatography (SEC) is well established for mAb aggregate analysis. As the technique has been used since the early days of mAb development for pharmaceutical purposes, various method improvements have evolved. For instance, the benefits of arginine on analytical SEC of mAb aggregate samples are well-known. Herein, we present how SEC of mAb aggregate samples may take advantage of...

The compositions of paradoxin and taipoxin (PDx and TPx, respectively) were investigated using size exclusion chromatography (SEC) and nano-electrospray ionization mass spectrometry (nano-ESI-MS). The elution profiles from size exclusion chromatography of the venoms from Oxyuranus microlepidotus and Oxyuranus scutellatus were similar. Fractions corresponding to the trimeric toxins were treated ...

■ ■ Robust method development to facilitate a successful SE-UPLC method transfer IN T RO DU C T IO N Size-exclusion chromatography (SEC) has been the predominant technique for the analysis of biotherapeutic protein aggregation, or high molecular weight forms (HMW), an important degradation pathway that has been found to correlate with undesired immunogenic effects and/or decreased efficacy.1,2 ...

Size exclusion chromatography (SEC) is an important technique for the characterization of high molecular substances such as proteins or polymers. It is the standard method to determine and quantify aggregation levels for protein-based pharmaceuticals and is generally required for regulatory approval. This Application Note describes a simple and sensitive method for the quantitative analysis of ...