AbstractCadmium selenide quantum dots were capped with reduced graphene oxide that was modified with thioglycolic acid. The nanocomposite was prepared by 5-min sonication of a solution of graphene oxide, thioglycolic acid, and cadmium(II) nitrate and selenium powder in the presence of NaBH4. X-ray diffraction and transmission electron microscopy were used to characterize the nanocomposite. A glassy carbon electrode (GCE) was modified with this nanocomposite and used for simultaneous determination of dopamine (DA), ascorbic acid (A) and uric acid (UA). The modified GCE was characterized by using cyclic voltammetry and differential pulse voltammetry. Simultaneous determination of AA, DA and UA was accomplished at working voltages of −50, +148 and + 280 mV (all vs. Ag/AgCl), respectively. The voltammetric response to DA is linear in the 4.9 to 74.0 μM concentration range, and the detection limit (defined as 3σ of the blank) is 0.11 μM. The respective data are 0.39–1.0 mM and 66 μM for AA, and 9.0 to 120.0 μM and 0.12 μM for UA. The electrode was successfully applied to the determination of the 3 species in spiked urine samples. Graphical abstract Graphical abstract contains poor quality of text in image. Otherwise, please provide replacement figure file.Thank you for your comment. New garaphical abstract was attached.A sonochemical method was applied for synthesizing reduced graphene oxide decorated thioglycolic acid capped cadmium selenide quantum dots. A modified glassy carbon electrode was prepared for simultaneous determination of ascorbic acid, dopamine and uric acid.

中文翻译：

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超声辅助制备由还原氧化石墨烯和 CdSe 量子点组成的纳米复合材料及其在同时伏安法测定抗坏血酸、多巴胺和尿酸中的应用

摘要硒化镉量子点被巯基乙酸改性的还原氧化石墨烯覆盖。该纳米复合材料是通过在 NaBH4 存在下对氧化石墨烯、巯基乙酸、硝酸镉 (II) 和硒粉的溶液进行 5 分钟超声处理来制备的。X 射线衍射和透射电子显微镜用于表征纳米复合材料。用这种纳米复合材料修饰玻碳电极 (GCE)，用于同时测定多巴胺 (DA)、抗坏血酸 (A) 和尿酸 (UA)。通过使用循环伏安法和差分脉冲伏安法来表征修改后的 GCE。AA、DA 和 UA 的同时测定分别在 -50、+148 和 +280 mV（全部与 Ag/AgCl）的工作电压下完成。对 DA 的伏安响应在 4.9 到 74 之间呈线性。0 μM 浓度范围，检测限（定义为空白的 3σ）为 0.11 μM。AA 的相应数据为 0.39–1.0 mM 和 66 μM，UA 的数据为 9.0 到 120.0 μM 和 0.12 μM。该电极成功应用于加标尿样中3种物质的测定。图形摘要 图形摘要在图像中包含低质量的文本。否则，请提供替换图形文件。感谢您的评论。附上新的论文摘要。采用声化学法合成还原氧化石墨烯修饰巯基乙酸封端的硒化镉量子点。制备了同时测定抗坏血酸、多巴胺和尿酸的改性玻碳电极。AA 为 0 mM 和 66 μM，UA 为 9.0 至 120.0 μM 和 0.12 μM。该电极成功应用于加标尿样中3种物质的测定。图形摘要 图形摘要在图像中包含低质量的文本。否则，请提供替换图形文件。感谢您的评论。附上新的论文摘要。采用声化学法合成还原氧化石墨烯修饰巯基乙酸封端的硒化镉量子点。制备了同时测定抗坏血酸、多巴胺和尿酸的改性玻碳电极。AA 为 0 mM 和 66 μM，UA 为 9.0 至 120.0 μM 和 0.12 μM。该电极成功应用于加标尿样中3种物质的测定。图形摘要 图形摘要在图像中包含低质量的文本。否则，请提供替换图形文件。感谢您的评论。附上新的论文摘要。采用声化学法合成还原氧化石墨烯修饰巯基乙酸封端的硒化镉量子点。制备了同时测定抗坏血酸、多巴胺和尿酸的改性玻碳电极。否则，请提供替换图形文件。感谢您的评论。附上新的论文摘要。采用声化学法合成还原氧化石墨烯修饰巯基乙酸封端的硒化镉量子点。制备了同时测定抗坏血酸、多巴胺和尿酸的改性玻碳电极。否则，请提供替换图形文件。感谢您的评论。附上新的论文摘要。采用声化学法合成还原氧化石墨烯修饰巯基乙酸封端的硒化镉量子点。制备了同时测定抗坏血酸、多巴胺和尿酸的改性玻碳电极。