Eco-friendly sugarcane bagasse-based biochar alginate beads as green sorbents for rapid and highly efficient...

In this work, an environmentally method was proposed for the trace determination of benzoylureas by high performance liquid chromatography system after micro-solid phase extraction method. Sugarcane bagasse-based biochar alginate beads as were employed as sorbent material. The synthesized material was characterized. The univariate optimization approach was performed to determine optimum conditions for both preparation of sugarcane bead adsorbents and micro-solid phase extraction procedure. Under optimal conditions, the limit of detection was found to be in the range of 1.0 - 2.0 μg L^-1 and the linearity was obtained between 3.0 and 400 μg L^-1 with coefficient of determination greater than 0.99. The applicability of the investigated method was evaluated with recovery studies by spiking experiments in tea samples. The acceptable recovery results between 72.1 and 121.1 % by applying matrix matching calibration showed that the proposed analytical approach is feasible for the determination of benzoylurea insecticides in tea matrices.