synthesis and identification of meta-(4-bromobenzyloxy) benzaldehyde thiosemicarbazone (mbbotsc) as novel ligand for cadmium extraction by ultrasound assisted-dispersive-ionic liquid-liquid micro extraction method

In this research, meta-(4-bromobenzyloxy) benzaldehyde thiosemicarbazone (mbbotsc) as a novel ligand was synthesized from the reaction between meta-(4-bromobenzyloxy) benzaldehyde and thiosemicarbazide under basic condition in water and ethanol as solvents. ligand has the ability to chelate ions and therefore, it was used to form a complex and extract ions. then, the cadmium ions in water and wastewater samples were separated based on mbbotsc by ultrasound assisted-dispersive-ionic liquid-liquid microextraction method (usa-d-illme) before determination by at-f-aas. the mbbotsc ligand was added to the mixture of the ionic liquid/acetone (il/ac, [omim][pf6]) and then injected by syringe to 50 ml of water samples at ph 6-7. the sample was put into the ultrasonic accessory for 5 minutes, after complexation (ligand-cd; rs…cd….rs), the water sample was centrifuged for 3 min for phase separation.  due to complexation and back-extraction of cd in liquid phase, the amount of cd ions in the water samples was determined by at-f-aas . in optimized conditions, the linear ranges and lod for 50 ml of water samples were obtained 1-36 μg l-1 and 0.3 μg l-1, respectively (mean rsd= 1.26%). the validation results were successfully achieved by spiking real samples and using et-aas.