Abstract
A technique was developed for simultaneous detection of fenitrothion (FNT) and chlorpyrifos-methyl (CLT) using a photonic suspension array based on silica colloidal crystal beads (SCCBs). The SCCBs were encoded with the characteristic reflection peak originating from the stop-band of colloidal crystal. This approach avoids the bleaching, fading or potential interference seen when encoding by fluorescence. SCCBs with a nanopatterned surface had increased biomolecule binding capacity and improved stability. Under optimal conditions, the proposed suspension array allowed simultaneous detection of the selected pesticides in the ranges of 0.25 to 1024 ng/mL and 0.40 to 735.37 ng/mL, with the limits of detection (LODs) of 0.25 and 0.40 ng/mL, respectively. The suspension array was specific and had no significant cross-reactivity with other chemicals. The mean recoveries in tests in which samples were spiked with target standards were 82.35% to 109.90% with a standard deviation within 9.93% for CLT and 81.64% to 108.10% with a standard deviation within 8.82% for FNT. The proposed method shows a potentially powerful capability for fast quantitative analysis of pesticide residues.
Highlights
Organophosphorus pesticides are environmental pollutants in agricultural and non-agricultural products
The European Union Commission (EU) has set maximum residue limits (MRLs) to control levels of pesticide residues and many countries have established legal directives and monitoring programs to supervise whether or not pesticide residues are compliant with the statutory maximum residue levels
We report on a photonic suspension array based on silica colloidal crystal beads (SCCBs) for multiplex detection of organophosphorus pesticides
Summary
Organophosphorus pesticides are environmental pollutants in agricultural and non-agricultural products. They have been widely used in agriculture to protect crops against insect damage, as well as in the household to control a number of ecoparasites in domestic animals [1]. They are used to protect turf and ornamental plants. The development of a rapid, inexpensive, sensitive and high sample throughput analytical method for detection of pesticides is of particular significance and necessity
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
