Wang J, Tian B
Department of Chemistry, New Mexico State University, Las Cruces 88003.
Anal Chem. 1993 Jun 1;65(11):1529-32. doi: 10.1021/ac00059a008.
Gold-coated screen-printed electrodes offer reliable quantitation of trace lead in connection with potentiometric stripping analysis (PSA). Such replacement of mercury-based sensors, with gold-coated ones, avoids environmental contamination associated with the disposal of mercury electrodes in connection with large-scale screening for lead poisoning. The PSA operation obviates the need for oxygen removal, offers low background contributions, and minimizes surfactant interferences. Changes in the peak intensity and position (vs mercury-coated strips) offer new selectivity dimensions. Various experimental parameters are optimized to allow convenient monitoring of micrograms per liter lead concentrations following short deposition periods. Applicability to urine and drinking water samples is illustrated. The highly stable response of these screen-printed electrodes makes them very attractive for both single-use and multiple applications.
镀金丝网印刷电极结合电位溶出分析（PSA）可实现对痕量铅的可靠定量。用镀金电极取代汞基传感器，避免了在大规模铅中毒筛查中与汞电极处置相关的环境污染。PSA操作无需除氧，背景贡献低，并能最大程度减少表面活性剂干扰。峰强度和位置的变化（与涂汞条带相比）提供了新的选择性维度。优化了各种实验参数，以便在短沉积时间后方便地监测每升微克级的铅浓度。说明了其在尿液和饮用水样品中的适用性。这些丝网印刷电极的高度稳定响应使其在一次性和多次使用方面都极具吸引力。
