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These samples were compared to the appropriate standards.

They then tested recovery and precision data from several samples: drugs including ketamine, d­ 4-ketamine, buprenorphine, d 3-buprenorphine, norbuprenorphine, and d 3-norprenorphine, spiked in either horse serum or bovine plasma, and Vitamin B samples contained in a vitamin-fortified breakfast shake, infant formula, and a fortified sports recovery drink. The researchers tested the ability of the dual head version of the MPS autosampler, equipped with the GERSTEL mVORX, mVAP, centrifuge and Universal Filtration Options (depending on the requirements of the extraction protocols). The team’s results were presented last summer at the American Society for Mass Spectrometry (ASMS) Conference on Mass Spectrometry and Allied Topics, in St. Analytical chemists have been looking for a way to automate these processes to increase throughput and reduce exposure to solvents, without compromising data quality.Ī GERSTEL team found that the same X-Y-Z coordinate autosamplerused for sample introduction in GC/MS or LC/MS/MS can also perform liquid-liquid sample preparation procedures, using a single instrument and accompanying software. Liquid-liquid extractions have traditionally been performed manually, including the time-consuming steps of partitioning by relative solubility and the use of hazardous organic solvents. GERSTEL Instrumentation Shutdown Procedures.