کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5008693 | 1462037 | 2018 | 7 صفحه PDF | دانلود رایگان |
- A molecular imprinted polymer was synthesized for recognition of 3-Phenoxybenzaldehyde with dual functional monomers.
- A colorimetric detection method was developed based on molecular imprinted polymer.
- The proposal method can be used to detect the total pyrethroid pesticides with naked eyes.
A simple colorimetric method was developed for the detection of 3-Phenoxybenzaldehyde (3-PBD), the metabolite of pyrethroid pesticides, based on surface molecularly imprinted polymer (MIP). In this method, MIP layer was coated on the surface of monodispersed silica nanoparticles via sol-gel process with 3-Aminopropyltriethoxysilane (APTES) and phenyltrimethoxysilane (PTES) as monomers. Compare with single functional monomer, APTES and PTES can interact with 3-PBD mainly by hydrogen bonding and Ï-Ï staking interaction, which makes the synthetic MIPs show better affinity and absorption capacity towards target than that of signal functional monomer. After eluted from MIP nanoparticles, the 3- PBD resulted in a distinctive color fading by potassium permanganate reduction. Taking advantage of this phenomenon, the 3- PBD could be detected by recording the absorption of potassium permanganate solution with MIPs as the recognition element. The MIPs, synthesized under various conditions, were characterized by fourier transform infrared spectrometry and scanning electro microscopy. Meanwhile, their absorption performance were also investigated. Under the optimum condition, the proposed method exhibited a linear concentration range of 3-PBD from 0.1 μg mLâ1 to 1 μg mLâ1 with a lower detection limit of 0.052 μg mLâ1 (S/N = 3). Moreover, this method was further used to detect 3-PBD in real samples form river water, fruit juice, and beverage. Satisfactory recovery was achieved in the range of 90.0 â¼Â 98.9%, which clearly demonstrating the potential value of this strategy in the detection of total pyrethroid pesticides.
Journal: Sensors and Actuators B: Chemical - Volume 254, January 2018, Pages 417-423