A STUDYING SYNTHESIS OF A CHELATE-FORMING SORBENT BASED ON UREA-FORMALDEHYDE AND DIPHENYLCARBAZONE : STUDYING SYNTHESIS OF A CHELATE-FORMING SORBENT BASED ON UREA-FORMALDEHYDE AND DIPHENYLCARBAZONE . (2024). Indian Journal of Chemistry (IJC), 63(6), 579-585. https://doi.org/10.56042/ijc.v63i6.9006