诚信声明我声明，所呈交的毕业论文（设计）是本人在老师指导下进行的研究工作及取得的研究成果。据我查证，除了文中特别加以标注和致谢的地方外，论文（设计)中不包含其他人已经发表或撰写过的研究成果，也不包含为获得其他教育机构的学位或证书而使用过的材料。我承诺，论文（设计）中的所有内容均真实、可信。毕业论文（设计）作者（签名）：年月日基于碳量子点荧光淬灭检测生蚝中铜离子的含量【摘要】目的：建立一种基于碳量子点荧光淬灭检测铜离子的方法。方法：采用一锅合成法合成醛基碳量子点，研究铜离子淬灭醛基碳量子点的淬灭效率，并分别对反应时间、温度、pH值进行了优化。结果：铜离子可以显著淬灭醛基碳量子点荧光并在0-400μM呈现良好线性关系，最低检测限达0.29μM,回收率为：88.9%-113.4%。结论：本法具有灵敏度高、选择性强，应用于生蚝的铜离子浓度检测取得了较好的结果。【关键词】碳量子点：荧光淬灭：铜离子A carbon quantum dots based fluorescencequenchingmethod to determine the content of copper ion in FreshOyster[Abstract Purpose:Establ ishment of a carbon quantum dots(CQDs)basedfluorescence quenching method to detect copper ion.Method:One potsynthesis method was used to synthesize aldehydic carbon quantum dotsto explore the quenching abi lity of copper ion to the fluorescence emittedby aldehydic carbon quantum dots.And the reaction time,temperature andpH value on the quenching process have also been optimized in this study.Results:Copper ion demonstrated a significant quenching effect with agood Iinear relationship between fluorescence quenching efficiency andthe concentration of the copper ion ranging from 0-400 uM.The lowestdetection Iimit is 0.29 uM.The quantitative recovery is between 88.9%and 113.4%Conclusion:The method developed in this study is sensitiveand selective to detect the copper ion.A good result was obtained whenit was used to determine the content of the copper ion of fresh oyster.[Keywords carbon quantum dots,fluorescence quenching,copper ion3