Fig. 3From: Spectrophotometric determination of Cu(II) in soil and vegetable samples collected from Abraha Atsbeha, Tigray, Ethiopia using heterocyclic thiosemicarbazoneEffect of pH on the absorbance of Cu(II)–2-APT complex at a wavelength of 370 nm; [Cu(II)] = 1 × 10−4 M; [2-APT] = 1 × 10−2 MBack to article page