MIPs logo MIPdatabase      Special issue call for papers   
Custom Search
Reference type: Journal
Authors: Nestic M, Babic S, Pavlovic DM, Sutlovic D
Article Title: Molecularly imprinted solid phase extraction for simultaneous determination of Δ 9-tetrahydrocannabinol and its main metabolites by gas chromatography-mass spectrometry in urine samples.
Publication date: 2013
Journal: Forensic Science International
Volume: 231
Issue: (1-3)
Page numbers: 317-324.
DOI: 10.1016/j.forsciint.2013.06.009
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0379073813003319

Abstract: In presented paper analytical method based on solid-phase extraction using molecularly imprinted polymer and gas chromatography-mass spectrometry has been developed and validated for the confirmation of THC, THC-OH and THC-COOH in urine samples. Non-covalent molecularly imprinted polymers of THC-OH were prepared using different functional monomers (methacrylic acid, 4-vinylpyridine, and 2-hydroxyethyl methacrylate), ethylene glycol dimethacrylate as a cross-linker and 2,2'-azobis-isobutyronitrile as an initiator of radical polymerization. Analytes were extracted from urine samples using prepared polymer sorbent with highest binding selectivity and capability. Before extraction, urine samples were hydrolyzed with alkaline. Elution was performed with chloroform:ethyl acetate (60:40, v/v). Dry extracts were silylated with BSTFA + 1% TMCS. Detection and quantification were performed using gas chromatography-mass spectrometry in single ion recording mode. The developed method was linear over the range from LOQ to 150 ng mL-1 for all three analytes. For THC, THC-OH and THC-COOH LOD was 2.5, 1 and 1 ng mL-1, and LOQ was 3, 2 and 2 ng mL-1, respectively. The precision, accuracy, recovery and matrix effect were investigated at 5, 25 and 50 ng mL-1. In the investigated concentration range recoveries were 71.9% for THC, 78.6% for THC-OH and 75.2% for THC-COOH. Matrix effect was not significant (< 10%) for all analytes in the concentration range from 5 ng mL-1 to 50 ng mL-1. Extraction recovery on non-imprinted polymer was relatively high indicating high non-specific binding. Optimized and validated method was applied to 15 post-mortem urine samples
Template and target information: Δ 9-tetrahydrocannabinol, THC, cannabinoids, THC-OH, THC-COOH
Author keywords: Cannabis, molecularly imprinted solid phase extraction, Gas chromatography-mass spectrometry, Biological sample

  Eat, sleep, imprint, repeat shirt  SMI logo mug  Man of proper-tea mug in blue


Join the Society for Molecular Imprinting
Logo of the Society for Molecular Imprinting

New items RSS feed
new items RSS feed  View latest updates

Sign-up for e-mail updates:
Choose between receiving an occasional newsletter or more frequent e-mail alerts.
Click here to go to the sign-up page.

Is your name elemental or peptidic? Enter your name and find out by clicking either of the buttons below!
Other products you may like:
view listings for MIP books on eBay:

Mickey Mouse 90th Anniversary banner