A sensitive fluorescent assay for the determination of parathion-methyl using AHNSA probe with MnO2 nanosheets

Review of 2D MnO2 Nanosheets as FRET-Based Nanodot Fluorescence Quenchers in Chemosensing Applications

“…Similarly, Qiu and co-workers constructed a fluorescence assay for the detection and estimation of parathion−methyl (PM) by using 4-amino-3-hydroxy-1-naphthalenesulfonic acid (AHNSA, a commercially available fluorophore; Table 3, entry 11) and MnO 2 NSs via FRET and estimated the LOD of 0.18 ng/mL. 169 Chen and Xiao's group developed a single-particle enumeration method for the detection of AChE activity based on the FRET between fluorescent conjugated polymer nanoparticles (FCPNPs) prepared by the nanoprecipitation method using the fluorescent polymer PFBT and amphiphilic copolymer PSMA. 170 Recently, Liu et al designed a ratiometric fluorescence immunoassay via FRET comprising MnO 2 NSs, OPD, and fluorescent carbon nanoparticles (FCNPs) for the detection of α-fetoprotein (AFP) enzyme.…”

“…Besides carbon-based nanodots, several fluorescent materials were also used in conjugation with MnO 2 NSs to detect various analytes via FRET (Table ). − …”

Construction of a logic gate computation and visual test paper for methyl paraoxon assay based on a fluorescent europium–organic framework

“…Thus, to overcome these shortcomings, the application of fluorescence methods has surged owing to their high sensitivity, dexterity, low cost and simple operation. [14][15][16][17][18][19][20] Among them, biosensors utilizing bio-enzymes as recognition elements are the most commonly employed fluorescence sensing systems. [18][19][20] However, although biosensors have the potential to offer excellent sensitivity and selectivity, their lack of stability, low anti-interference ability and cumbersome testing procedure hinder their practical application.…”

“…[14][15][16][17][18][19][20] Among them, biosensors utilizing bio-enzymes as recognition elements are the most commonly employed fluorescence sensing systems. [18][19][20] However, although biosensors have the potential to offer excellent sensitivity and selectivity, their lack of stability, low anti-interference ability and cumbersome testing procedure hinder their practical application. Thus, the development of more convenient approaches for monitoring DMNP with the aid of rapid, reliable, portable and environment-friendly methods is significant.…”

Density-adjusted liquid-phase microextraction with smartphone digital image colorimetry to determine parathion-methyl in water, fruit juice, vinegar, and fermented liquor

“…Organophosphate pesticides have been widely applied in agricultural production since their discovery. 1 Parathion-methyl is a widely used organophosphate pesticide 2 that is related to acute toxicity through inhibiting the enzyme acetylcholinesterase in the nervous system. 3 Parathion-methyl is also classified as a toxicity category I (extremely toxic) insecticide by the WHO and U.S. EPA with a median lethal dose (LD 50 ) value of <5 mg kg −1 .…”