中文摘要：石墨烯材料由于具有优良的电学、力学和热学性能，在许多应用领域得到了研究。本研究研发了一种环境友好的用L-半胱氨酸和维生素C作还原剂，在温和反应条件下制备还原氧化石墨金纳米颗粒(rGO-AuNP)纳米复合材料的方法。研究表明，该材料能特异性分离黄曲霉毒素同系物。通过测定回收率(77.6-105.0%)、灵敏性（检测限范围0.05-0.21μg/kg）及精度(1.5-11.8%)进一步验证了该材料的有效性，并成功地用它分离了玉米、小麦及水稻实际样品中的黄曲霉毒素。
外文摘要：Graphene-based materials have been studied in many applications, owing to the excellent electrical, mechanical, and thermal properties of graphene. In the current study, an environmentally friendly approach to the preparation of a reduced graphene oxide-gold nanoparticle (rGO-AuNP) nanocomposite was developed by using L-cysteine and vitamin C as reductants under mild reaction conditions. The rGO-AuNP material showed a highly selective separation ability for 6 naturally occurring aflatoxins, which are easily adsorbed onto traditional graphene materials but are difficult to be desorbed. The specificity of the nanocomposite was evaluated in the separation of 6 aflatoxin congeners (aflatoxin B1, aflatoxin B2, aflatoxin G1, aflatoxin G2, aflatoxin M1 and aflatoxin M2) from 23 other biotoxins (including, ochratoxin A, citrinin, and deoxynivalenol). The results indicated that this material was specific for separating aflatoxin congeners. The synthesized material was further validated by determining the recovery (77.6-105.0%), sensitivity (limit of detection in the range of 0.05-0.21 μg kg-1), and precision (1.5-11.8%), and was then successfully applied to the separation of aflatoxins from real-world maize, wheat and rice samples.
作者：Guo, WB；Wu, LD；Fan, K；Nie, DX；He, WJ；Yang, JH；Zhao, ZH；Han, Z
作者单位：Shanghai Acad Agr Sci
期刊名称：SCIENTIFIC REPORTS
期刊影响因子：5.228
出版年份：2017
出版刊次：11
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