novel magnetic nano sorbent modified with tannic acid for micro magnetic solid phase extraction of herbicides and determination by corona discharge ion mobility spectrometry

Design and constructing proper magnetic silica core shell nanoparticles modified with tannic acid are coupled with corona discharge ion mobility spectrometry for high efficiency extraction and determination of trace amount of herbicides. several techniques such as ft-ir, sem, dls, vsm, xrd and edx have been used to verify the structural characterization of the magnetic nano sorbent. micro magnetic solid phase extraction followed by corona discharge ion mobility spectrometry, μ-mspe-cd-ims was applied as low-cost, rapid, sensitive, and selective procedure for detection and quantitation of haloxyfop-methyl, oxyfluorfen and trifluralin in garlic, onion, soy bean, soil and agricultural waste water samples. the effective parameters of the procedure were optimized; sorbent amount 5 mg, extraction time 20 minutes, desorption agent methanol, volume desorption agent 50 μl, desorption time 2 minutes, ph 7, salt addition 0% and temperature of solution 20⁰c were achieved. lod, rsd, lrd, and extraction recovery of the procedure were obtained (0.45-0.61 ppb), (<5.62%), (1.5-100 ppb), and (92-98%), respectively.