Güell Raquel, Aragay Gemma, Fontàs Clàudia, Anticó Enriqueta, Merkoçi Arben
ICREA & Nanobioelectronics & Biosensors Group, Institut Català de Nanotecnologia, Bellaterra, Barcelona, Spain.
Anal Chim Acta. 2008 Oct 10;627(2):219-24. doi: 10.1016/j.aca.2008.08.017. Epub 2008 Aug 27.
Sensitive and stable monitoring of heavy metals in seawater using screen-printed electrodes (SPE) is presented. The analytical performance of SPE coupled with square wave anodic stripping voltammetry (SWASV) for the simultaneous determination of Pb and Cd in seawater samples, in the low microgL(-1) range, is evaluated. The stripping response for the heavy metals following 2min deposition was linear over the concentration range examined (10-2000microgL(-1)) with detection limits of 1.8 and 2.9microgL(-1) for Pb and Cd, respectively. The accuracy of the method was validated by analyzing metal contents in different spiked seawater samples and comparing these results to those obtained with the well-established anodic stripping voltammetry using the hanging mercury drop electrode. Moreover, a certified reference material was also used and the results obtained were satisfactory.
本文介绍了使用丝网印刷电极（SPE）对海水中重金属进行灵敏且稳定的监测。评估了SPE与方波阳极溶出伏安法（SWASV）联用在低微克/升（μg L⁻¹）范围内同时测定海水样品中Pb和Cd的分析性能。在2分钟沉积后，重金属的溶出响应在所研究的浓度范围（10 - 2000 μg L⁻¹）内呈线性，Pb和Cd的检测限分别为1.8和2.9 μg L⁻¹。通过分析不同加标海水样品中的金属含量，并将这些结果与使用悬汞滴电极的成熟阳极溶出伏安法所获得的结果进行比较，验证了该方法的准确性。此外，还使用了有证标准物质，获得的结果令人满意。
