| CdSe量子点作探针共振瑞利散射法测定葡聚糖硫酸钠 |
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| 引用本文： | 刘丹.CdSe量子点作探针共振瑞利散射法测定葡聚糖硫酸钠[J].达县师范高等专科学校学报,2011,21(2):51-54. |
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| 作者姓名： | 刘丹 |
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| 作者单位： | 西南大学化学化工学院,重庆北碚,400715;四川文理学院化学与化学工程系,四川达州,635000 |
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| 基金项目： | 四川省教育厅青年科研项目 |
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| 摘 要： | 在乙酸-乙酸钠缓冲溶液中，以巯基乙胺为稳定剂在水相中合成CdSe量子点，巯基乙胺自组装在量子点的表面葡聚糖硫酸钠（Dextran Sulfate Sodium，简称DSS）靠静电引力及疏水作用力结合形成粒径较大的聚集体，这种聚集体的形成导致共振瑞利散射（Resonance Rayleigh Scattering RRS）强度显著增大，最大散射峰位于536nm．同时二级散射（second-orderscattering SOS）和倍频散射（frequency-doublingscattering FDS）的强度也显著增强，最大散射峰分别位于785nm、290nm．其中，RRS方法有较高的灵敏度和较低的检出限，它的线性范围为0．012～1．0μg·mL^-1，检出限为3．68ng·mL-1．从而建立用CdSe量子点作为探针RRS法测定葡聚糖硫酸钠的灵敏度高，简便、快速的新方法．应用于尿样的测定结果令人满意．
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| 关 键 词： | 检测 CdSe量子点 共振瑞利散射 葡聚糖硫酸钠 |
Resonance Rayleigh Scattering Spectral Method for Determination of Dextran Sulfate Sodium with CdSe QDs as Probe |
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| LIU Dan.Resonance Rayleigh Scattering Spectral Method for Determination of Dextran Sulfate Sodium with CdSe QDs as Probe[J].Journal of Daxian Teachers College,2011,21(2):51-54. |
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| Authors: | LIU Dan |
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| Institution: | LIU Dan1,2(1.Chemistry and Chemical Engineering College of Southwest University,Beibei Chongqing,400715,China,2.Chemistry and Chemical Engineering Department of Sichuan University of Arts and Science,Dazhou Sichuan 635000,China) |
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| Abstract: | In the acetic acid-sodium acetate buffer solution,cysteamine is employed as stabilizing agents to synthesize CdSe quantum dots,cysteamine self-assembled on the surface of CdSe-QDs to form positive supermolecular.Dextran Sulfate Sodium(DSS) with univalent positive charges can combine with the CdSe-QDs by the virtue of electrostatic and hydrophobic interaction,forming bigger aggregate.The aggregate arouses resonance Rayleigh Scattering(RRS) intensity enhancing greatly and the maximum wavelengths locates at 53... |
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| Keywords: | Detection CdSe quantum dots resonance Rayleigh scattering Dextran Sulfate Sodium |
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