In-silico optimisation of two-dimensional high performance liquid chromatography for the determination of Australian methamphetamine seizure samples
Andrighetto, Luke, Burns, Niki K., Stevenson, Paul, Pearson, James, Henderson, Luke, Bowen, Christopher and Conlan, Xavier 2016, In-silico optimisation of two-dimensional high performance liquid chromatography for the determination of Australian methamphetamine seizure samples, Forensic science international, vol. 266, pp. 511-516, doi: 10.1016/j.forsciint.2016.07.016.
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In-silico optimisation of two-dimensional high performance liquid chromatography for the determination of Australian methamphetamine seizure samples
In-silico optimisation of a two-dimensional high performance liquid chromatography (2D-HPLC) separation protocol has been developed for the interogation of methamphetamine samples including model, real world seizure, and laboratory synthesised samples. The protocol used Drylab® software to rapidly identify the optimum separation conditions from a library of chromatography columns. The optimum separation space was provided by the Phenomonex Kinetex PFP column (first dimension) and an Agilent Poroshell 120 EC-C18 column (second dimension). To facilitate a rapid 2D-HPLC analysis the particle packed C18 column was replaced with a Phenomenex Onyx Monolithic C18 withought sacrificing separation performance. The Drylab® optimised and experimental separations matched very closely, highlighting the robust nature of HPLC simulations. The chemical information gained from an intermediate methamphetamine sample was significant and complimented that generated from a pure seizure sample. The influence of the two-dimensional separation on the analytical figures of merit was also investigated. The limits of detection for key analytes in the second dimension determined for methamphetamine (4.59 × 10-⁴ M), pseudoephedrine (4.03 × 10-4 M), caffeine (5.16 × 10-⁴ M), aspirin (9.32 × 10-4 M), paracetamol (5.93 × 10-4 M) and procaine (2.02 × 10-3 M).
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