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Nanozyme Sensor Arrays Based on Heteroatom-Doped Graphene for Detecting Pesticides.
Analytical Chemistry ( IF 6.7 ) Pub Date : 2020-05-04 , DOI: 10.1021/acs.analchem.9b05110 Yunyao Zhu 1 , Jiangjiexing Wu 1 , Lijun Han 2 , Xiaoyu Wang 1 , Wei Li 3 , Hongchao Guo 2 , Hui Wei 1, 4, 5
Analytical Chemistry ( IF 6.7 ) Pub Date : 2020-05-04 , DOI: 10.1021/acs.analchem.9b05110 Yunyao Zhu 1 , Jiangjiexing Wu 1 , Lijun Han 2 , Xiaoyu Wang 1 , Wei Li 3 , Hongchao Guo 2 , Hui Wei 1, 4, 5
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Pesticides, widely used for pest control and plant growth regulation, have posed a threat to the environment and human health. Conventional methods to analyze pesticide residues are not applied to resource-limited areas because of their high cost, complexity, and requirements for expensive instruments (such as GC/MS and LC/MS). To address these challenges, herein we fabricated colorimetric nanozyme sensor arrays based on heteroatom-doped graphene for detection of aromatic pesticides. The active sites of nanozymes could be differentially masked when different pesticides were adsorbed on the graphene, which in turn resulted in the decrease of their peroxidase-mimicking activities. On the basis of this principle, five pesticides (i.e., lactofen, fluoroxypyr-meptyl, bensulfuron-methyl, fomesafen, and diafenthiuron) from 5 to 500 μM were successfully discriminated by the sensor arrays. In addition, discrimination for different concentrations of each pesticide and different ratios of two mixed pesticides were also demonstrated. The practical application of the sensor arrays was further validated by successfully discriminating the pesticides in soil samples. This work not only provides a facile and cost-effective method to detect pesticides but also makes a positive contribution to food safety and environmental protection.
中文翻译：
基于杂原子掺杂石墨烯的纳米酶传感器阵列，用于检测农药。
广泛用于害虫控制和植物生长调节的农药对环境和人类健康构成了威胁。由于农药残留的高成本，复杂性以及对昂贵仪器（例如GC / MS和LC / MS）的要求，因此无法将常规方法用于农药残留分析。为了解决这些挑战，本文中我们基于杂原子掺杂的石墨烯制造了用于检测芳香族农药的比色纳米酶传感器阵列。当不同的农药被吸附在石墨烯上时，纳米酶的活性位点可以被不同地掩盖，从而导致其过氧化物酶模拟活性的降低。根据这一原则，五种农药（即乳芬，氟吡喃-甲基，苄嘧磺隆，氟美沙芬，传感器阵列已成功分辨出5至500μM的二甲亚砜和二苯噻隆）。此外，还证明了对每种农药的不同浓度和两种混合农药的不同比例的区分。通过成功地区分土壤样品中的农药，进一步验证了传感器阵列的实际应用。这项工作不仅为检测农药提供了一种简便且经济高效的方法，而且为食品安全和环境保护做出了积极贡献。
更新日期：2020-05-04
中文翻译：
基于杂原子掺杂石墨烯的纳米酶传感器阵列，用于检测农药。
广泛用于害虫控制和植物生长调节的农药对环境和人类健康构成了威胁。由于农药残留的高成本，复杂性以及对昂贵仪器（例如GC / MS和LC / MS）的要求，因此无法将常规方法用于农药残留分析。为了解决这些挑战，本文中我们基于杂原子掺杂的石墨烯制造了用于检测芳香族农药的比色纳米酶传感器阵列。当不同的农药被吸附在石墨烯上时，纳米酶的活性位点可以被不同地掩盖，从而导致其过氧化物酶模拟活性的降低。根据这一原则，五种农药（即乳芬，氟吡喃-甲基，苄嘧磺隆，氟美沙芬，传感器阵列已成功分辨出5至500μM的二甲亚砜和二苯噻隆）。此外，还证明了对每种农药的不同浓度和两种混合农药的不同比例的区分。通过成功地区分土壤样品中的农药，进一步验证了传感器阵列的实际应用。这项工作不仅为检测农药提供了一种简便且经济高效的方法，而且为食品安全和环境保护做出了积极贡献。
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