MIPs logo MIPdatabase      MIP2018 Conference website
Custom Search
Reference type: Journal
Authors: Drabova L, Pulkrabova J, Kalachova K, Tomaniova M, Kocourek V, Hajslova J
Article Title: Rapid determination of polycyclic aromatic hydrocarbons (PAHs) in tea using two-dimensional gas chromatography coupled with time of flight mass spectrometry.
Publication date: 2012
Journal: Talanta
Volume: 100
Page numbers: 207-216.
DOI: 10.1016/j.talanta.2012.07.081
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0039914012006704

Abstract: A simple, fast, and cost effective sample preparation procedure has been developed and validated for the determination of 15+1 European Union Polycyclic Aromatic Hydrocarbons (15+1 EU PAHs) in dried tea leave samples. Based on a critical assessment of several sample extraction/clean-up approaches, the method based on the ethyl acetate extraction followed by the use of PAHs dedicated cartridges with molecularly imprinted polymers (MIPs) has been found as an optimal alternative in terms of time demands and obtained good extract purity. For the final identification/quantification of target PAHs, two dimensional gas chromatography coupled to a time-of-flight mass spectrometry (GCxGC-TOFMS) was used. The performance characteristics of the overall analytical method for individual PAHs determined at three spiking levels (0.5, 2.5 and 5 μg kg-1) were in following ranges: limits of quantitation (LOQs) 0.05 - 0.2 μg kg-1, repeatabilities 2 - 9%, and recoveries 73 - 103%. The recoveries achieved by the newly developed sample preparation procedure when employed for naturally contaminated sample (''incurred'' PAHs) were comparable to those obtained by other routinely used approaches employing sonication and/or pressurised liquid extraction for sample analytes isolation. The validated method was subsequently used for the determination of selected genotoxic PAHs in 36 samples of black and green tea obtained from the Czech retail market. The levels of σPAH4 (sum of benzo[a]anthracene (BaA), chrysene (CHR), benzo[b]fluoranthene (BbFA) and benzo[a]pyrene (BaP)) in black and green tea leaves ranged from 7.4 to 700 μg kg-1 and from 4.5 to 102 μg kg-1, respectively. Contamination of tested tea samples by BaP was in the range of 0.2 - 152 μg kg-1.
Template and target information: polycyclic aromatic hydrocarbons, PAHs, benzo[a]anthracene, BaA, chrysene, CHR, benzo[b]fluoranthene, BbFA, benzo[a]pyrene, BaP
Author keywords: Dried tea leaves, polycyclic aromatic hydrocarbons, PAHs, Molecularly imprinted polymers, MIPs, GCxGC-TOFMS


  I love MISPE mug  multi MIPs logo mug  American periodic table patriotic shirt

Molecules Special Issue call     Sensors Special Issue call






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:
US listings   UK listings

Searching for Molecular Imprinting books on Amazon.com:
Molecular Imprinting
Imprinted Polymers
Polymer Chemistry
Organic Chemistry
Biosensors

Find what you need at Amazon.com

Lab supplies from Amazon