Journal
TALANTA
Volume 85, Issue 1, Pages 282-289Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2011.03.060
Keywords
Molecularly imprinted polymers; Atrazine; Reversible addition-fragmentation chain transfer; Precipitation polymerization
Categories
Funding
- National Natural Science Foundation of China [20975089]
- Chinese Academy of Sciences [KZCX2-EW-206]
- Department of Science and Technology of Shandong Province of China [2008GG20005005]
- Department of Science and Technology of Yantai City of China [2010158]
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Controlled/living free radical polymerization (CLRP) has been accepted as an effective technique in preparation of polymers because of its inherent advantages over traditional free radical polymerization. In this work, reversible addition-fragmentation chain transfer (RAFT) polymerization, the ideal candidate for CLRP, was applied to prepare atrazine molecularly imprinted polymers (MIPs) by precipitation polymerization. The resultant RAFT-MIPs demonstrated uniform spherical shape with rough surface containing significant amounts of micropores, leading to an improvement in imprinting efficiency compared with that of the MIPs prepared by traditional precipitation polymerization (TR-MIPs). The maximum binding capacities of the RAFT-MIPs and TR-MIPs were 2.89 mg g(-1) and 1.53 mg g(-1). respectively. The recoveries ranging from 81.5% to 100.9% were achieved by one-step extraction by using RAFT-MIPs for preconcentration and selective separation of atrazine in spiked lettuce and corn samples. These results provided the possibility for the separation and enrichment of atrazine from complicated matrices by RAFT-MIPs. (C) 2011 Elsevier B.V. All rights reserved.
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