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- Title
Poly(allylamine hydrochloride) Functionalized Multiwalled Carbon Nanotube Modified Carbon Paste Electrode as Acetylcholinesterase Biosensor Transducer.
- Authors
Çevik, Serdar; Timur, Suna; Anik, Ülkü
- Abstract
In this work, a sensitive, practical and reliable acetylthiocholine (ATCh) biosensor based on poly(allylamine hydrochloride) functionalized multiwalled carbon nanotube (PAH/MWCNT) was fabricated and used for pesticide detection. As far as we know, this is the first work that constitutes the usage of PAH and MWCNT for ATCh biosensor. The developed system was characterized by using scanning electron microscopy, electrochemical impedance spectroscopy and cyclic voltammetry. The influence of parameters such as enzyme amount and pH were examined and a linearity between 5×10−5 M−2.0×10−3 M for ATCh was obtained. The proposed biosensor was applied for a model pesticide, monocrotophos, detection. The analytical curve showed an excellent linearity in the monocrotophos concentration range of 1-25 pg/mL with an incubation time of 5 min. Limit of detection and limit of quantification values were calculated as 0.88 and 2.9 pg/mL, respectively. The system was also applied for detection of monocrotophos in grape, tomatoe, tap and mineralized water samples and promising recovery values were obtained.
- Subjects
ELECTRIC properties of multiwalled carbon nanotubes; PERFORMANCE of carbon electrodes; CHOLINERGIC receptors; BIOSENSORS; ALLYLAMINES; SCANNING electron microscopy; IMPEDANCE spectroscopy
- Publication
Electroanalysis, 2013, Vol 25, Issue 10, p2377
- ISSN
1040-0397
- Publication type
Article
- DOI
10.1002/elan.201300260