Abstract
A simazine sensing system, composed of column packed with a molecularly imprinted polymer (Sim‐MIP) and an electrochemical analyzer, was scaled down in order to easily determine the concentration of simazine, an environmentally restricted chemical, in tap water. In order to enhance the detection limit, the ratio of the eluent (dilution rate) in the electrolyte was optimized to 10%. A new in‐house built column size with ∅ = 1.5 mm was prepared, and 3 mg of Sim‐MIP particles was packed in the column. During the sensing process, 90% of the simazine loaded to the column was collected by elution. The reductive current of simazine was determined up to 1–10 μM. Solid phase extraction through the Sim‐MIP column enabled simazine to be selectively detected from a mixed aqueous solution containing structural analogues in the range of 10–40 nM. Whether the concentration of simazine in tap water had reached environmentally restricted levels (10–40 nM) was determined within 1 hour using this system.
Highlights
Triazine herbicides have been widely used to effectively increase the quantity of agricultural produce
We investigated the preparation of an imprinted polymer for simazine (SimMIP) from methacrylic acid (MAA) and ethylene glycol dimethacrylate (EDMA) as a sensor receptor for the construction of a simazine sensing system [8]
The sensing system was constructed from Sim-molecularly imprinted polymers (MIPs) particles packed in a column for the selective collection of simazine and an Journal of Sensors electrochemical analyzer, in which an amalgamated gold electrode was used as the working electrode in place of a dropping mercury electrode [10]
Summary
Triazine herbicides have been widely used to effectively increase the quantity of agricultural produce. The sensing system was constructed from Sim-MIP particles packed in a column for the selective collection (solid phase extraction) of simazine and an Journal of Sensors electrochemical analyzer, in which an amalgamated gold electrode was used as the working electrode in place of a dropping mercury electrode [10]. For the detection of 10 nM simazine, a large volume (10 L) of 100 nmol simazine sample solution was applied to the column and eluted to a volume of 10 mL and electrochemically analyzed. The system was scaled down by constructing an in-house built disposable column to realize a practical monitoring system.The optimum sensing system enabled simazine at environmentally restricted concentrations in tap water to be monitored within a time frame of 1 hour
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
