Multi-detector
hydrodynamic chromatography of colloids: following in Hamish Small's footsteps.
Heliyon 2021;
7:e06691. [PMID:
33997367 PMCID:
PMC8102424 DOI:
10.1016/j.heliyon.2021.e06691]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 03/02/2021] [Accepted: 03/30/2021] [Indexed: 11/24/2022] Open
Abstract
Hamish Small, scientist extraordinaire, is best known as the inventor of both ion chromatography and hydrodynamic chromatography (HDC). The latter has experienced a renaissance during the last decade-plus, thanks principally to its coupling to a multiplicity of physicochemical detection methods and to the structural and compositional information this provides. Detection methods such as light scattering (both multi-angle static and dynamic), viscometry, and refractometry can combine to yield insight into macromolecular or colloidal size, structure, shape, and molar mass, all as a function of one another and continuously across a sample's chromatogram. It was the author's great fortune to have known Hamish during the last decade of his life, before his passing in 2019. Here, a brief personal recollection is followed by an introduction to HDC and its application, in quadruple-detector packed-column mode, to the analysis of a commercial colloidal silica with an elongated shape.
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