涂有膨润土-碳复合材料的铂电极作为检测铅的环境传感器。
Platinum electrode coated with a bentonite-carbon composite as an environmental sensor for detection of lead.
作者信息
Abbaspour Abdolkarim, Izadyar Anahita
机构信息
Chemistry Department, College of Sciences, Shiraz University, Hafezieh, Shiraz 71454, Iran.
出版信息
Anal Bioanal Chem. 2006 Nov;386(5):1559-65. doi: 10.1007/s00216-006-0727-4. Epub 2006 Sep 16.
A Pt wire coated with a bentonite-carbon composite in a poly(vinyl chloride) membrane was used for detection of lead. The sensor has a Nernstian slope of 29.42+/-0.50 mV per decade over a wide range of concentration, 1.0 x 10(-7) to 1.0 x 10(-3) mol L(-1) Pb(NO(3))(2). The detection limit is 5.0 x 10(-8) mol L(-1) Pb(NO(3))(2) and the electrode is applicable in the pH range 3.0-6.7. It has a response time of approximately 10 s and can be used at least for three months. The electrode has good selectivity relative to nineteen other metal ions. The practical analytical utility of the electrode is demonstrated by measurement of Pb(II) in industrial waste and river water samples.
一种在聚氯乙烯膜中涂覆有膨润土 - 碳复合材料的铂丝用于检测铅。该传感器在1.0×10⁻⁷至1.0×10⁻³mol L⁻¹Pb(NO₃)₂的宽浓度范围内具有每十倍浓度变化29.42±0.50 mV的能斯特斜率。检测限为5.0×10⁻⁸mol L⁻¹Pb(NO₃)₂，该电极适用于pH范围为3.0 - 6.7。其响应时间约为10秒，并且至少可以使用三个月。相对于其他19种金属离子，该电极具有良好的选择性。通过对工业废水和河水样品中Pb(II)的测量证明了该电极的实际分析效用。
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