Development of selective electrochemical interface based on MXENE and molecularly imprinted polydopamine for detection of chlorpyrifos | |
| Author | Wararuk Pumngam |
| Call Number | AIT Thesis no.FB-22-04 |
| Subject(s) | Chlorpyrifos Electrochemical sensors |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Food Engineering and Bioprocess Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Chlorpyrifos (CHL) is an insecticide primarily used in agriculture and . CHL residue has been found in various fruit and vegetable products. As pesticides are known to have carcinogenic, cytotoxic, genotoxic, teratogenic and immunotoxic effect, their residue should be strictly limited below Maximum Residue Limit (MRL) .An effective method to detect and monitor CHL residue in agricultural products is strongly desirable. This study attempted to develop a novel electrochemical sensor for CHL detection. Screen-printed carbon electrode (SPCE) was coated with MXene and molecularly imprintedpolydopamine in the presence of chlorpyrifos as the template via electropolymerization. Key parameters including concentration of MXene and template, polymerization cycles, and elution time were optimized. Electrochemical detection of chlorpyrifos was performed by Different Pulse Voltammetry (DPV) in 5 mM K3Fe(CN)6 in 1 M KCl solution and characterized by SEM-EDX and EIS. The calibration curve showed a range of linear relationships from 1 x 10-11 to 1x10-5 M. Limit of detection (LOD) and limit of quantification (LOQ) was 1.52 x 10-12 and 7.00 x 10-10 M, respectively. The recovery percentage of CHL in orange juice was detected from 84.79 ± 8.26 % to 110.17 ± 9.43 %. |
| Year | 2022 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Food Engineering and Bioprocess Technology (FB) |
| Chairperson(s) | Loc Thai Nguyen;Suwussa Bamrungsap (Co-Chairperson) |
| Examination Committee(s) | Anal, Anil Kumar;Salin, Krishna R. |
| Scholarship Donor(s) | Royal Thai Government Fellowship |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2022 |