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. Author manuscript; available in PMC: 2018 Mar 21.
Published in final edited form as: Anal Chem. 2017 Mar 3;89(6):3345–3352. doi: 10.1021/acs.analchem.6b03894

Fig. 7.

Fig. 7

Determination of Pb in pond water. (a) ASV of pond water directly diluted 1× by acetate buffer (0.2 M, pH 5.5), with additional 0–50 ppb Pb. (b) Standard addition curve for Pb in pond water. (c) ASV of pond water spiked with 50 ppb Pb and diluted 1× by acetate buffer (0.2 M, pH 5.5). (d) Standard addition curve for pond water spiked with 50 ppb Pb. Preconcentration potential −0.8 V, time 300 s, amplitude 50 mV, period 50 ms, increment 8 mV.