Hong, Sihui; She, Yongxin; Cao, Xiaolin; Wang, Miao; He, Yahui; Zheng, Lufei; Wang, Shanshan; Abd El-Aty, A. M.; Hacimuftuoglu, Ahmet; Yan, Mengmeng; Wang, Jing published the artcile< A novel CdSe/ZnS quantum dots fluorescence assay based on molecularly imprinted sensitive membranes for determination of triazophos residues in cabbage and apple>, Reference of 3290-92-4, the main research area is cadmium selenium zinc sulfide quantumdot fluorescence triazofos sensitive membrane; CdSe/ZnS QDs probe; cabbage and apple; fluorescence assay; imprinted array film; triazophos.
In the present study we have developed a direct competitive CdSe/ZnS quantum dot (QD) fluorescence assay based on micro-array-imprinted membranes for the determination of triazophos in cabbage and apple. The imprinted membranes were directly synthesized on the surface of a 96-well plate by thermal polymerization using triadimefon as the dummy template. Under optimal conditions, the assay showed an excellent linear response over the concentration ranges of 0.1-10,000μg L-1 with a good coefficient of determination (R2= 0.982). The sensitivity (IC50) and limit of detection (LOD, expressed as IC15) of the developed assay were 3.63 mg L-1 and 0.31μg L-1, resp. The applicability of the developed approach was tested for detecting triazophos in incurred samples. The method showed excellent recoveries (109.6-118.9%) and relative standard deviations (RSDs) between 9.9 and 19.5%. The obtained results correlated well with those obtained by LC-MS/MS (R2= 0.9995). The competitive assay using CdSe/ZnS QDs as fluorescence-labeled probe showed good sensitivity, steady and fast response, and excellent anti-interference ability compared to conventional fluorescence-quenching methods. Finally, the feasibility of the proposed methodol. was successfully applied for detection of triazophos in real samples.
Frontiers in Chemistry (Lausanne, Switzerland) published new progress about Apple. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Reference of 3290-92-4.
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