Validation of an UHPLC/DAD method for the determination of cannabinoids in seized materials: Analysis of 213 samples sold in Belgian CBD shops.

•A method was successfully validated for the determination of major cannabinoids in plant material.•It was then applied to 213 samples seized in CBD shops.•Half of the products were exceeding the legal threshold of 0.2% THC + THC-A.•Large discrepancies were observed between labeled and measured CBD concentration.•Large discrepancies were observed for a same same strain sold in various CBD shop.