[Preparation of magnetic metal-organic frameworks-polydopamine for extraction and detection of cationic dyes from water samples in a fishery].

@Z67D for the two dyes were 777 and 688, respectively. The extraction performance was largely unaffected even after the new material was reused 10 times. The method was applied successfully for the adsorption and detection of the above mentioned two dyes in fishpond water. The spiking recoveries of the two cationic dyes ranged from 82.0% to 109.0%, and the RSD was lower than 2.9%.