Please use this identifier to cite or link to this item:
|Title:||On-line monitoring imidacloprid and thiacloprid in celery juice using quartz crystal microbalance|
|Authors:||Bi, X. |
|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|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Mar 13, 2018
WEB OF SCIENCETM
checked on May 9, 2018
checked on Jun 29, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.