Development of a silica monolith modified with Fe3O4 nano‐particles in centrifugal spin column format for the extraction of phosphorylated compounds |
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Authors: | Ali Alwy Sarah P Clarke Dermot F Brougham Brendan Twamley Brett Paull Blánaid White Damian Connolly |
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Institution: | 1. Irish Separation Science Cluster, National Centre for Sensor Research, Dublin City University, Glasnevin, Dublin, Ireland;2. National Institute for Cellular Biotechnology, School of Chemical Sciences, Dublin City University, Dublin, Ireland;3. School of Chemical Sciences, Dublin City University, Glasnevin, Dublin, Ireland;4. School of Chemistry, Trinity College Dublin, Dublin, Ireland;5. Australian Centre for Research on Separation Science, School of Chemistry, University of Tasmania, Tasmania, Australia;6. Pharmaceutical and Molecular Biotechnology Research Centre, Department of Chemical and Life Sciences, Waterford Institute of Technology, Waterford, Ireland |
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Abstract: | In this study, citrate‐stabilised iron oxide nano‐particles (~16 nm) have been immobilised on commercial silica monolithic centrifugal spin columns (MonoSpin) for the extraction of phosphorylated compounds. Two alternative strategies were adopted involving either direct electrostatic attachment to an aminated MonoSpin (single‐layer method) in the first instance, or the use of a layer‐by‐layer method with poly(diallyldimethylammonium) chloride. Field‐emission scanning electron spectroscopy and energy‐dispersive X‐ray spectroscopy was used for confirming notably higher coverage of nano‐particles using the layer‐by‐layer method (2.49 ± 0.53 wt%) compared with the single‐layer method (0.43 ± 0.30 wt%). The modified monolith was used for the selective separation/extraction of adenosine monophosphate, adenosine diphosphate and adenosine triphosphate with elution using a phosphate buffer. A reversed‐phase liquid chromatographic assay was used for confirming that adenosine, as a non‐phosphorylated control was not retained on the modified MonoSpin devices, whereas recovery of 80% for adenosine monophosphate, 86% for adenosine diphosphate and 82% for adenosine triphosphate was achieved. |
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Keywords: | Centrifugal spin columns Iron oxide Nano particles Nucleotide extraction Silica monoliths |
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