Enhancing enrichment ability of Co-Al- layered double hydroxides-mixed matrix membrane microextraction by deep eutectic solvent for analysis of warfarin in biological samples and its quantification via high-performance liquid chromatography-ultraviolet detection

•Co-Al LDH- MMM-DES was used for the extraction and determination of some of warfarin.•Co-Al LDH was synthesized and immobilized on the inner surface of HF.•The method allows combining of extraction, clean-up and preconcentration in one step.•The method can be directly used in relatively complicated samples.•The method is effective, sensitive, cost-effective and have wide LDRs and low LODs.