Solid phase extraction of carbamate pesticides with banana peel derived hierarchical porous carbon prior to high performance liquid chromatography

Abstract

In this work, biomass derived hierarchical porous carbon (BHPC) was prepared via a facile, cost-effective and green route by carbonizing banana peel waste. Textural characterization shows that the material possesses hierarchical pores and a large Brunauer–Emmett–Teller surface area of 561.8 m² g⁻¹. The BHPC was used as a solid phase extraction sorbent for the enrichment of carbamate pesticides from cucumber and watermelon samples coupled with high-performance liquid chromatography with a diode array detector. Under the optimal conditions, good linearity was obtained in the concentration range of 0.2–80.0 ng g⁻¹ for propoxur and bassa, and 0.5–80 ng g⁻¹ for isoprocarb, with a correlation coefficient (r) larger than 0.9969. The limits of detection of the method were in the range of 0.05–0.20 ng g⁻¹. The results show that BHPC has great potential to be applied for the isolation and preconcentration of organic analytes from complex matrices.