Comparison of different approaches for direct coupling of solid-phase microextraction to mass spectrometry for drugs of abuse analysis in plasma.

"Declaration of competing interest The authors declare that there are no conflicts of interest. Declaration of competing interest"

"We would like to thank Shimadzu Scientific Instruments (Columbia, MD, USA) and Shimadzu Corporation (Kyoto, Japan) for providing Shimadzu LCMS 8060 MS with a PESI ionization interface used in this work, as well as for their financial support. We would also like to thank Restek Corporation for providing the commercial CBS blades. Finally, we are grateful to the Natural Science and Engineering Research Council (NSERC) of Canada for their financial support through the Industrial Research Chair program. This study was also financially supported by the 10.13039/501100004442National Science Centre, Poland (Grant No.: 2020/04/X/NZ9/01281). Wei Zhou: Formal analysis, Investigation, Methodology, Validation, Visualization, Writing - Reviewing & Editing; Martyna N. Wieczorek: Methodology, Validation, Writing - Reviewing & Editing; Runshan W. Jiang: Methodology, Investigation; Janusz Pawliszyn: Conceptualization, Funding acquisition, Methodology, Supervision, Project administration, Writing - Reviewing & Editing."