Fig. 2From: Spectrophotometric determination of Cu(II) in soil and vegetable samples collected from Abraha Atsbeha, Tigray, Ethiopia using heterocyclic thiosemicarbazoneAbsorption spectra of: a reagent (3-APT) versus blank; b Cu(II)–3-APT complex versus reagent, [Cu(II)] = 1 × 10−3 M, [3-APT] = 1 × 10−2 M, pH 9.0Back to article page