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Analytical techniques

 

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Native liquid chromatography coupled to mass spectrometric analysis for the assessment of higher order structures of proteins

28 April 2020 | By

The accurate measurement of the molecular mass of proteins is an essential component of protein characterisation. In this article, Ioannis Papayannopoulos discusses the applications of native protein chromatography coupled to mass spectrometry to enable the characterisation of tertiary structures and non-covalent interactions.

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Application of liquid chromatography in characterisation of lipid nanoparticle-based oligonucleotides

28 April 2020 | By , , ,

Duplex oligonucleotides (OGN) with lipid nanoparticles (LNPs) as delivery vehicles for different therapeutic indications are of great interest in pharma, exemplified by the recent approval of Onpattro from Alnylam Pharmaceuticals. Liquid chromatography is an essential analytical technique in the characterisation of LNPs containing OGNs. This brief review is intended to…

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Expert view: Sterility testing of challenging samples

27 April 2020 | By

While membrane filtration is often straightforward, some sample types can be challenging. These include difficult-to-filter viscous oils, water-in-oil emulsions and fatty base ointments as well as samples containing substances that inhibit microbial growth.