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Chiral single‐walled carbon nanotubes as chiral selectors in multimode enantioselective sensors
Chirality ( IF 2.8 ) Pub Date : 2020-11-26 , DOI: 10.1002/chir.23288 Raluca‐Ioana Stefan‐van Staden 1 , Ionela Raluca Comnea‐Stancu 1
Chirality ( IF 2.8 ) Pub Date : 2020-11-26 , DOI: 10.1002/chir.23288 Raluca‐Ioana Stefan‐van Staden 1 , Ionela Raluca Comnea‐Stancu 1
Affiliation
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Single‐walled carbon nanotube‐(7,6) chirality was used for the design of multimode enantioselective sensors using different carbon matrices such as graphene paste, graphite paste, and carbon nanopowder‐based paste. l‐ and d‐malic acids were used as model analytes. The responses of the multimode sensors were evaluated for potentiometric and differential pulse voltammetry (DPV) modes. When carbon nanopowder was used as matrix, the multimode sensor was enantioselective for d‐malic acid in the concentration range 10−3 to 10−15 mol/L for the potentiometric mode and 10−5 to 10−8 mol/L for the DPV mode. The graphite paste‐based sensor was enantioselective for l‐malic acid in the ranges: 10−10 to 10−13 for the potentiometric mode and 10−4 to 10−7 mol/L for the DPV mode. The sensors based on graphene and chiral single‐walled carbon nanotubes were enantioselective for d‐malic acid, and a response was obtained only in the DPV mode. Accordingly, the matrix influenced both the enantioselectivity and the sensitivity of the measurements. The application of the sensors was for the enantioanalysis of malic acid in wines and apple juice samples. The proposed method is fast and reliable and allows the quantification of l‐ and d‐malic acids using electrochemical methods based on different principles, from the real samples after a buffering of the samples. The enantioanalysis of malic acid in wine and juice samples was performed with high recoveries (higher than 90.00%) and low relative standard deviation (RSD) (%) values (lower than 1.00%).
中文翻译：
手性单壁碳纳米管作为多模式对映选择性传感器中的手性选择剂
单壁碳纳米管-（7,6）手性用于设计使用不同碳基质（例如石墨烯糊，石墨糊和碳纳米粉基糊）的多模对映选择性传感器。l-和d-苹果酸用作模型分析物。对多模式传感器的响应进行了电位和差分脉冲伏安（DPV）模式的评估。当使用碳纳米粉作为基质时，多模式传感器对d-苹果酸的对映体浓度范围为电位模式为10 -3至10 -15 mol / L，DPV为10 -5至10 -8 mol / L模式。基于石墨糊的传感器对l-苹果酸的范围：对于电位模式为10 -10至10 -13，对于DPV模式为10 -4至10 -7 mol / L。基于石墨烯和手性单壁碳纳米管的传感器对d-苹果酸具有对映选择性，仅在DPV模式下可获得响应。因此，基质影响了对映选择性和测量灵敏度。传感器的应用是用于葡萄酒和苹果汁样品中苹果酸的对映体分析。所提出的方法快速可靠，可以对l和d进行量化苹果酸在缓冲后使用基于不同原理的电化学方法从真实样品中提取。对葡萄酒和果汁样品中的苹果酸进行对映体分析，回收率高（高于90.00％），相对标准偏差（RSD）（％）值低（低于1.00％）。
更新日期：2020-12-11
中文翻译：
手性单壁碳纳米管作为多模式对映选择性传感器中的手性选择剂
单壁碳纳米管-（7,6）手性用于设计使用不同碳基质（例如石墨烯糊，石墨糊和碳纳米粉基糊）的多模对映选择性传感器。l-和d-苹果酸用作模型分析物。对多模式传感器的响应进行了电位和差分脉冲伏安（DPV）模式的评估。当使用碳纳米粉作为基质时，多模式传感器对d-苹果酸的对映体浓度范围为电位模式为10 -3至10 -15 mol / L，DPV为10 -5至10 -8 mol / L模式。基于石墨糊的传感器对l-苹果酸的范围：对于电位模式为10 -10至10 -13，对于DPV模式为10 -4至10 -7 mol / L。基于石墨烯和手性单壁碳纳米管的传感器对d-苹果酸具有对映选择性，仅在DPV模式下可获得响应。因此，基质影响了对映选择性和测量灵敏度。传感器的应用是用于葡萄酒和苹果汁样品中苹果酸的对映体分析。所提出的方法快速可靠，可以对l和d进行量化苹果酸在缓冲后使用基于不同原理的电化学方法从真实样品中提取。对葡萄酒和果汁样品中的苹果酸进行对映体分析，回收率高（高于90.00％），相对标准偏差（RSD）（％）值低（低于1.00％）。
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