Dual-template imprinted polymers for class-selective solid-phase extraction of seventeen triazine herbicides and metabolites in agro-products.

•The dual-template imprinting strategy was introduced to synthesize MIP for triazine herbicides and metabolites.•The obtained DMIP possessed multiple types of recognition sites for chloro-, thiomethyl- and methoxy- triazines.•DMIP was successfully applied for class-selective extraction of 17 triazine herbicides and metabolites from agro-products.•A high sensitive and accurate DMIP-SPE-LC/MS-MS method was developed and validated.•DMIP-SPE was demonstrated to be reliable, highly class-selective, and cost effective for sample pre-treatment technique.