. 2022 Nov 16;7(47):42819–42827. doi: 10.1021/acsomega.2c04747

Table 3. Performance Characteristics of Zn²⁺ Spectrophotometric Determination (ΔA_λ = A_λi – A_λ0, n = 6, P = 0.95).

dye	regression equation	RSD²	linear range, μmol·L^–1	LOD (3S), μmol·L^–1
3b	ΔA₆₄₀ = (0.003 ± 0.001) + (0.0103 ± 0.0001)·C_Zn, μmol·L^–1	0.999	1.0–20.0	0.43
3b	ΔA₆₀₀ = (0.005 ± 0.002) + (0.0111 ± 0.0002)·C_Zn, μmol·L^–1	0.998	1.0–20.0	0.54
4	ΔA₆₁₀ = (0.0013 ± 0.0009) + (0.0028 ± 0.0002)·C_Zn, μmol·L^–1	0.992	1.7–12.1	0.96
4	ΔA₅₉₀ = (0.002 ± 0.001) + (0.0032 ± 0.0002)·C_Zn, μmol·L^–1	0.990	1.7–12.1	0.94

Table 3. Performance Characteristics of Zn2+ Spectrophotometric Determination (ΔAλ = Aλi – Aλ0, n = 6, P = 0.95).