Fig. 3.
Effect of solution acidity adjusted by HCl or H2SO4 on the signals profiles for 1.0 μg L−1 Pb. K3Mn(CN)6 = 0.5% m/v in 1% v/v H2SO4, NaBH4 = 1% m/v in 0.1% m/v NaOH.
Effect of solution acidity adjusted by HCl or H2SO4 on the signals profiles for 1.0 μg L−1 Pb. K3Mn(CN)6 = 0.5% m/v in 1% v/v H2SO4, NaBH4 = 1% m/v in 0.1% m/v NaOH.