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Extraction of AM2201 Metabolites in Urine Using: 200 mg Clean Screen® Extraction Column
Jeffery Hackett, PhD and Albert A. Elian, MS, UCT, Inc.
This method describes the efficient use of Clean Screen® THC SPE columns for the extraction and analysis of a newer synthetic cannabinoid (AM2201) metabolite from human urine. This method produces high recoveries and low matrix effects.
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A Solid Phase Extraction Method for the Analysis of Psilocin and Psilocybin in Urine
Jeffery Hackett, PhD and Albert A.Elian, MS, UCT, Inc.
This method describes the efficient extraction and analysis of the hallucinogenic compounds psilocybin and psilocin from human urine using Clean Screen® DAU SPE columns and LC–MS-MS. The analysis covered a linear range from 10 ng/mL to 1000 ng/mL with average recoveries of the individual cannabinoids found to be >85%.
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Extraction of THC, THC-OH, THC-COOH in Whole Blood Using 200 mg Clean Screen® Extraction Column
Jeffery Hackett, PhD and Albert A. Elian, MS, UCT, Inc.
This method is used for the extraction of THC, THC-OH, and THC-COOH in whole blood. LC–MS-MS instrumentation is used for analysis with a linear range of 1 ng/mL to 100 ng/mL with average recoveries of individual cannabinoids found to be greater than 95%.
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ChloroFiltr®: A Novel Sorbent for Chlorophyll Removal Using QuEChERS
Xiaoyan Wang, UCT, Inc.
Spinach and other highly pigmented vegetables contain chlorophylls, carotenoids, xanthophylls, and anthocyanin, which are frequently coextracted with pesticides. This application describes the use of a unique sorbent, ChloroFiltr®, for extracting pesticides, including planar pesticides, while reducing chlorophyll in sample extracts. Samples were analysed by LC–MS-MS with excellent pesticide recoveries.
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A Summary of US FDA LIB 4465: Collaboration of the QuEChERS Procedure for the Multiresidue Determination of Pesticides in Raw Agricultural Commodities by LC–MS-MS
Don Shelly, UCT, Inc.
This application demonstrates an effective tool for screening 173 multiclass pesticide residues in fruits and vegetables. The pesticide residues are quantitated against a single level calibration and can be completed in less than 20 min, with overall accuracy of 105% and RSD of 3% obtained.
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Determination of Pesticide Residues in Marijuana and Tea by QuEChERS and LC-MS-MS
Xiaoyan Wang, UCT, Inc.
Various pesticides can be rapidly determined in dried tea leaves or marijuana using this simple method. Samples are hydrated in water and then extracted by QuEChERS and dSPE cleanup using PSA and ChloroFiltr®. Results are determined by LC-MS-MS.
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Determination of Carbonyl Compounds in Water by Dinitrophenylhydrazine Derivatization and HPLC-UV
Don Shelly, UCT, Inc.
This application describes a method for the determination of free carbonyl compounds and aldehydes in water. A measured volume of sample is buffered to pH 3 and derivatized at 40 °C for 1 h using 2,4-dinitrophenylhydrazine. The derivatives are extracted by SPE with 2000 mg of C18, eluted with ethanol and detected by HPLC.
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Extraction and Determination of Acids, Bases, and Neutrals in Water Using Mixed-Mode Solid-Phase Extraction
Xiaoyan Wang, UCT, Inc.
A reliable, efficient method has been developed for EPA Method 8270 using a novel SPE sorbent with GC–MS detection. A wide range of 138 analytes including acids, bases, and neutrals, and very polar compounds can be analyzed using this method. This method eliminates the consumption of large quantities of solvent and multiple extractions at differing pH values.
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