Evaluation of two core–shell (Ag2S@- and Bi2S3@-) sensors based on a metal–organic framework (NH2-MIL-125-Ti)/polyaniline for the electroanalysis of uric acid in urine samples

Chemical sensors for the determination of uric acid (UA) in human urine samples have been developed using a composite material based on two core–shells (Ag 2 S@- and Bi 2 S 3 @-) coated with a metal–organic framework (NH 2 -MIL-125-Ti) and polyaniline (PANI).