用于检测实际样品中Cr(III)的碳纳米管复合涂层铂电极。
Carbon nanotube composite coated platinum electrode for detection of Cr(III) in real samples.
作者信息
Abbaspour Abdolkarim, Izadyar Anahita
机构信息
Chemistry Department, Shiraz University, Collage of Sciences, Hafezieh, Shiraz 71454, Iran.
出版信息
Talanta. 2007 Feb 15;71(2):887-92. doi: 10.1016/j.talanta.2006.05.085. Epub 2006 Aug 1.
This paper demonstrates the application of composite multi-walled carbon nanotube (MWNT) polyvinylchloride (MWNT-PVC) based on 1,5-diphenylcarbazide as chromium ionophore in potentiometric measurement. The sensor shows a good Nernstian slope of 19.52+/-0.40mV/decade in a wide linear range concentration of 6.3x10(-8) to 1.0x10(-2)M for Cr(NO(3))(3). The detection limit of this electrode was found to be 3.2x10(-8)M of Cr(NO(3))(3) and is applicable in a pH range of 3.0-6.8. It has a short response time of about 10s. This chromium electrode has a good selectivity over 16 various metal ions. The practical analytical utility of this electrode was demonstrated by measurement of Cr(III) in drinking water and mineral water samples without any serious preliminary pre-treatment and chromium in multivitamin.
本文展示了基于1,5 - 二苯卡巴肼作为铬离子载体的复合多壁碳纳米管（MWNT）聚氯乙烯（MWNT - PVC）在电位测量中的应用。该传感器在6.3×10⁻⁸至1.0×10⁻²M的Cr(NO₃)₃宽线性浓度范围内呈现出良好的能斯特斜率，为19.52±0.40mV/十倍浓度变化。该电极对Cr(NO₃)₃的检测限为3.2×10⁻⁸M，适用于pH值3.0 - 6.8的范围。它具有约10秒的短响应时间。该铬电极对16种不同金属离子具有良好的选择性。通过对饮用水、矿泉水样品中的Cr(III)进行测量，且无需任何严格的预处理，以及对多种维生素中的铬进行测量，证明了该电极的实际分析实用性。
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