LCGC North America Application Note Alert Having trouble viewing this email? Click here Comprehensive Screen of Acidic/Neutral/Basic Drugs from Blood and Urine Describes the highly retentive, universal nature of UCT’s polymeric Styre Screen® HLD sorbent for the analysis of acidic, neutral, and basic compounds in blood and urine Extraction of Loperamide and N-Desmethyl Loperamide from Blood Outlines a simple three-step method for the extraction of Loperamide and its main metabolite, N-desmethyl Loperamide, from blood using Clean Screen® XCEL SPE|columns. Quantitative Analysis of Benzodiazepines in Whole Blood by QuEChERS and LC–MS/MS This application describes an easy, fast, and effective method using QuEChERS for the quantitative analysis of benzodiazepines in whole blood. In-Well Hydrolysis Using UCT’s Refine™ Ultra-Filtration Technology UCT’s Refine™ Ultra-Filtration Technology allows for sample precipitation and filtration to occur simultaneously in the individual column or well. Analysis of Fentanyl and Designer Fentanyl Derivatives in Urine Using SPE and HPLC–MS/MS Presented is a rapid, three step SPE procedure, that includes a concentration step, for the identification and quantification of fentanyl and its urinary analogs. A Modified QuEChERS Approach for Liver Extractions This method outlines a modified QuEChERS based procedure that has been optimized to extract various drug compounds from liver prior to analysis by LC–MS.