Fast-Scan Deposition-Stripping Voltammetry at Carbon-Fiber Microelectrodes: Real-Time, Subsecond, Mercury Free Measurements of Copper
Fast-Scan Deposition-Stripping Voltammetry at Carbon-Fiber Microelectrodes: Real-Time, Subsecond, Mercury Free Measurements of Copper
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DOI：
10.1021/ac301358r
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发表时间：
2012-08-07
影响因子：
7.4
通讯作者：
Hashemi, Parastoo
中科院分区：
文献类型：
--
作者：
Pathirathna, Pavithra;Yang, Yuanyuan;Hashemi, Parastoo
已知水生系统中有害金属浓度升高会威胁人类健康。金属的流动性、生物利用度和毒性受化学形态的控制，这是一个动态过程。了解金属的行为是有限的，缺乏分析方法，可以提供快速，灵敏，原位测量。虽然电化学显示的承诺，它是有限的，其时间分辨率和汞修饰电极的必要性，在这封信中，我们采用快速扫描沉积-溶出伏安法在碳纤维微电极原位测量铜（II）。我们提出了一种新的，无汞的技术，可以测量铜（II）的ppb级的灵敏度在100毫秒的时间分辨率。
Elevated concentrations of hazardous metals in aquatic systems are known to threaten human health. Mobility, bioavailability, and toxicity of metals are controlled by chemical speciation, a dynamic process. Understanding metal behavior is limited by the lack of analytical methods that can provide rapid, sensitive, in situ measurements. While electrochemistry shows promise, it is limited by its temporal resolution and the necessity for Hg modified electrodes, In this letter, we apply fast-scan deposition-stripping voltammetry at carbon-fiber microelectrodes for in situ measurements of Cu(II). We present a novel, Hg-free technique that can measure Cu(II) with ppb sensitivity at 100 ms temporal resolution.