Fig. 1From: Spectrophotometric determination of Cu(II) in soil and vegetable samples collected from Abraha Atsbeha, Tigray, Ethiopia using heterocyclic thiosemicarbazoneAbsorption spectra of: a reagent (2-APT) versus blank; b Cu(II)–2-APT complex versus reagent, [Cu(II)] = 1 × 10−4 M, [2-APT] = 1 × 10−2 M, pH 9.0Back to article page