| CdTe量子点作探针共振瑞利散射法测定藻酸钠 |
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| 引用本文： | 刘丹,杨莉,张萍.CdTe量子点作探针共振瑞利散射法测定藻酸钠[J].达县师范高等专科学校学报,2013,23(5):38-40. |
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| 作者姓名： | 刘丹 杨莉 张萍 |
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| 作者单位： | 四川文理学院化学与化工学院,四川达州,635000 |
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| 基金项目： | 四川文理学院科研项目（2010B08Z） |
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| 摘 要： | 以巯基乙胺(cysteamine,CA)作为稳定剂,在水相中合成CA-CdTe QDs,形成带正电的聚合体.在弱酸性条件下,带正电的CA-CdTe量子点聚合体与带负电的藻酸钠(Sodium Alginate,SA)通过静电引力和疏水作用力结合形成粒径较大的聚合体,聚合体的形成导致共振瑞利散射(resonance Rayleigh scattering,RRS)强度显著增大,在一定实验条件下,散射强度的增强(△I)与藻酸钠的浓度成正比.RRS方法灵敏、简便、快速,可用于面粉中藻酸钠的痕量分析.
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| 关 键 词： | CdTe量子点 共振瑞利散射 藻酸钠 |
Resonance Rayleigh Scattering Method for Determination of Sodium Alginate with CdTe QDs as Probe |
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| LIU Dan
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YANG Li
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ZHANG Pin.Resonance Rayleigh Scattering Method for Determination of Sodium Alginate with CdTe QDs as Probe[J].Journal of Daxian Teachers College,2013,23(5):38-40. |
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| Authors: | LIU Dan YANG Li ZHANG Pin |
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| Institution: | LIU Dan, YANG Li,ZHANG Pin (Cllemistry and Chemical Engineering department of Sichuan University of Arts and Science Dazhou Sichuan 6,35000, China ) |
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| Abstract: | CdTe Quantum dots are synthesized in an aqueous solution using cysteamine （CA） as a stabilizing agerd. The stabili- zing agent self- assembled on tile surfm＇.e of CdTe Quantum dots to form superHmleeular complex eali,m wilh positive （：barges. In an acidie buffer of pll 5.0 -5.6, sodium alginate （SA） are negative cbarged and could bind with the complex cation to form larger aggregates via electrostatic attraction. And the larger aggregates induces the intensities of resonalme Rayleigh .scattering （ RRS）. Under optimum conditious, the ineremeuts of RRS intensity are directly proportion to the concentration of 5A in certain ranges. The RRS method is simple, rapid, sensitive and shows a promising application to the detection of SA in flour. |
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| Keywords: | CdTe QDs resonanee Rayleigh scattering sodium alginate |
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