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DBS direct elution: optimizing performance in high-throughput quantitative LC–MS/MS analysis. Bioanalysis 2015; 7:2003-17. [DOI: 10.4155/bio.15.120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Background: Automated DBS direct elution techniques eliminate the manual extraction burden of DBS bioanalysis, offer good quantitative performance, the ability to eliminate hematocrit-based assay bias, and, previous reports have demonstrated that significant increases in assay sensitivity compared with manual DBS extraction are possible. Results: An investigation into elucidating parameters for optimized generic DBS direct elution for high sample throughput quantitative bioanalytical applications is presented for the first time. Generic direct elution conditions were identified that enabled LC–MS/MS assay sensitivity to be maximized while retaining acceptable chromatographic performance. Conclusion: Compared with generic conventional DBS manual extraction, assay sensitivity was demonstrated to be increased up to 33-fold across four representative small molecule compounds, using the recommended direct elution conditions.
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Abu-Rabie P, Denniff P, Spooner N, Chowdhry BZ, Pullen FS. Investigation of Different Approaches to Incorporating Internal Standard in DBS Quantitative Bioanalytical Workflows and Their Effect on Nullifying Hematocrit-Based Assay Bias. Anal Chem 2015; 87:4996-5003. [DOI: 10.1021/acs.analchem.5b00908] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Paul Abu-Rabie
- Bioanalytical
Science and Toxicokinetics, Drug Metabolism and Pharmacokinetics,
Platform Technologies and Sciences, GlaxoSmithKline Research and Development, Ware, SG12 0DP, United Kingdom
- Faculty
of Engineering and Science, University of Greenwich, Medway Campus, Chatham Maritime, Kent ME4 4TB, United Kingdom
| | - Philip Denniff
- Bioanalytical
Science and Toxicokinetics, Drug Metabolism and Pharmacokinetics,
Platform Technologies and Sciences, GlaxoSmithKline Research and Development, Ware, SG12 0DP, United Kingdom
| | - Neil Spooner
- Bioanalytical
Science and Toxicokinetics, Drug Metabolism and Pharmacokinetics,
Platform Technologies and Sciences, GlaxoSmithKline Research and Development, Ware, SG12 0DP, United Kingdom
| | - Babur Z. Chowdhry
- Faculty
of Engineering and Science, University of Greenwich, Medway Campus, Chatham Maritime, Kent ME4 4TB, United Kingdom
| | - Frank S. Pullen
- Faculty
of Engineering and Science, University of Greenwich, Medway Campus, Chatham Maritime, Kent ME4 4TB, United Kingdom
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