EXTRACTION-SPECTROPHOTOMETRIC STUDY OF THE SYSTEM NICKEL(II) – HALOGENASEMERCAPTOPHENOL -AMINOPHENOL – WATER – CHLOROFORM

A.Z. Zalov, Z.G. Asgarova, Z.Z. Yakhshieva, U.B. Abasguliyeva, Sh.A. Mamedova , P.F. Нuseynova