Pipette tip micro‐solid phase extraction (octyl‐functionalized hybrid silica monolith) and ultra‐high‐performance liquid chromatography‐tandem mass spectrometry to determine cannabidiol and tetrahydrocannabinol in plasma samples - Cruz, Jonas Carneiro; Miranda, Luís Felippe Cabral; Queiroz, Maria Eugênia Costa (Journal of Separation Science, 2021)