Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/64329
Title: On-line monitoring imidacloprid and thiacloprid in celery juice using quartz crystal microbalance
Authors: Bi, X. 
Yang, K.-L. 
Issue Date: 15-Jan-2009
Citation: Bi, X., Yang, K.-L. (2009-01-15). On-line monitoring imidacloprid and thiacloprid in celery juice using quartz crystal microbalance. Analytical Chemistry 81 (2) : 527-532. ScholarBank@NUS Repository.
Abstract: In this article, we report a quartz crystal microbalance (QCM)-based detection method which allows the identification and quantification of two neonicotinoid pesticides, imidacloprid and thiacloprid, in aqueous solutions and celery juice. To achieve high selectivity, molecular imprinted monolayers (MIMs), which can either recognize 1 μM of imidacloprid or 1 μM of thiacloprid, are prepared from alkanethiols self-assembled on QCM sensor chips with preadsorbed templates (either imidacloprid or thia-cloprid). Our experimental results show that the detection limit can be improved by using alkanethiols having longer hydrocarbon chains. For example, MIMs prepared from hexadecanethiol have dissociation constants 2-5 times smaller than those prepared from octanethiol. To detect two neonicotinoids in vegetable samples simultaneously, we also develop a new type of MIM with two different templates. A single QCM decorated with this MIM can respond to 10 μM of imidacloprid and 10 μM thiacloprid in celery juice in a real-time manner. © 2009 American Chemical Society.
Source Title: Analytical Chemistry
URI: http://scholarbank.nus.edu.sg/handle/10635/64329
ISSN: 00032700
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

34
checked on Mar 13, 2018

WEB OF SCIENCETM
Citations

30
checked on May 9, 2018

Page view(s)

34
checked on Jun 29, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.