Abstract
The sensitive detection of iprobenfos (IBF) and edifenphos (EDI) was successfully conducted by using a new aptamer-based colorimetric multi-aptasensor. The dissociation constants of this multi-target aptamer to both iprobenfos and edifenphos were found to be 1.67. μM and 38. nM, respectively, according to the isothermal calorimetry assay. The aptamer EIA2 was selective to only IBF and EDI, confirmed by AuNP assays. By using this multi-aptasensor, both pesticides IBF and EDI can be eventually detected in a range from 10. nM to 5. nM, respectively. This multi-aptasensor was successfully implemented in spiked rice samples and the accuracies of this AuNP-based multi-aptasensor were around 80 and 90% in spiked paddy and polished rice samples, respectively. This aptamer EIA2 could be applied not only for the detection of pesticides from real samples in agriculture field as POC, but also can be used as a bioreceptor for other types of aptasensors.
| Original language | English |
|---|---|
| Pages (from-to) | 60-66 |
| Number of pages | 7 |
| Journal | Analytica Chimica Acta |
| Volume | 868 |
| DOIs | |
| Publication status | Published - 2015 Apr 8 |
Bibliographical note
Funding Information:This research was supported by Advanced Production Technology Development Program , Ministry of Agriculture, Food and Rural Affairs and the National Research Foundation of Korea (NRF) grant funded by the Korean Government (No. 2013R1A1A2021531 ).
Publisher Copyright:
© 2015 Elsevier B.V.
Keywords
- Atpamer
- Colorimetric
- Edifenphos
- Iprobenfos
- Multi-aptasensor
ASJC Scopus subject areas
- Analytical Chemistry
- Biochemistry
- Environmental Chemistry
- Spectroscopy