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首页> 外文期刊>Electrocatalysis >Voltammetric Determination of Pb(II) Ions at a Modified Kaolinite-Carbon Paste Electrode
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Voltammetric Determination of Pb(II) Ions at a Modified Kaolinite-Carbon Paste Electrode

机译：在改性高岭石 - 碳浆料电极下的Pb（II）离子的伏安测定

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摘要

We report a novel application of a carbon paste electrode modified with sodium dodecyl sulphate (SDS) intercalated kaolin clay for the electrochemical detection of Pb(2+)in aqueous medium using square wave voltammetry. SDS was used to modify a chemically purified kaolin clay via intercalation process to prepare a carbon paste electrode. The SDS kaolin clay was obtained by intercalation of SDS into the interlayer spaces of kaolinite in the presence of heat. The purified kaolinite and its SDS intercalate were characterised using techniques such as X-ray powder diffraction (XRD), X-ray fluorescence (XRF), thermogravimetric analysis (TGA), attenuated total reflection Fourier transform infrared (ATR-FTIR), scanning electron microscopy (SEM), BET and CHNS elemental analysis. These techniques proved the successful intercalation of SDS into the interlayer spaces of the clay adsorbent. Various parameters affecting the electrochemical detection of Pb2+ were optimised. A linear current response was obtained in the concentration range of 1-100 ppb. The limit of detection was found to be 2.48 ppb. The proposed sensor also demonstrates good reproducibility after series of 10 repetitive measurements with a relative standard deviation (RSD) of about 6.30%. The interfering effects of some ions on the detection of Pb2+ were evaluated. The proposed sensor was applied for the determination of Pb2+ in a real water sample.
机译：我们报告了用正方形波伏安法在水性介质中嵌入高癸酰硫酸钠（SDS）插层高岭土粘土的碳糊电极的新施用。 SDS用于通过嵌入方法改变化学纯化的高岭土粘土以制备碳浆料电极。通过将SDS嵌入到热量的情况下，通过将SDS插入高岭石的层间空间来获得SDS高岭土。使用诸如X射线粉末衍射（XRD），X射线荧光（XRF），热重分析（TGA），减毒的总反射傅里叶变换红外（ATR-FTIR），扫描电子，以纯化的高岭石及其SDstercalate表征表征。显微镜（SEM），BET和CHN元素分析。这些技术证明了SDS成功插入到粘土吸附剂的层间空间中。优化影响PB2 +电化学检测的各种参数。在1-100ppb的浓度范围内获得线性电流响应。发现检测限为2.48 ppb。所提出的传感器还通过约6.30％的相对标准偏差（RSD）串联10个重复测量后展示了良好的再现性。评估了一些离子对PB2 +检测的干扰效果。将所提出的传感器施用于真实水样中的PB2 +。

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