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1.云南省烟草烟叶公司,云南 昆明 650500
2.昆明理工大学 生命科学与技术学院,云南 昆明 650500
杨亚玲,教授,研究方向:分析化学,E-mail:13313116@kust.edu.cn
收稿:2024-12-09,
修回:2025-01-20,
录用:2025-02-10,
纸质出版:2025-10-15
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何彬,周渭皓,高宪辉,张海,陈敬悦,王雨童,杨德志,杨亚玲.基于Zn/NA-CDs荧光探针检测烟叶中游离氨基酸[J].分析测试学报,2025,44(10):2177-2183.
HE Bin,ZHOU Wei-hao,GAO Xian-hui,ZHANG Hai,CHEN Jing-yue,WANG Yu-tong,YANG De-zhi,YANG Ya-ling.Detection of Free Amino Acids in Tobacco Leaves Based on Zn/NA-CDs Fluorescent Probe[J].Journal of Instrumental Analysis,2025,44(10):2177-2183.
何彬,周渭皓,高宪辉,张海,陈敬悦,王雨童,杨德志,杨亚玲.基于Zn/NA-CDs荧光探针检测烟叶中游离氨基酸[J].分析测试学报,2025,44(10):2177-2183. DOI: 10.12452/j.fxcsxb.24120907.
HE Bin,ZHOU Wei-hao,GAO Xian-hui,ZHANG Hai,CHEN Jing-yue,WANG Yu-tong,YANG De-zhi,YANG Ya-ling.Detection of Free Amino Acids in Tobacco Leaves Based on Zn/NA-CDs Fluorescent Probe[J].Journal of Instrumental Analysis,2025,44(10):2177-2183. DOI: 10.12452/j.fxcsxb.24120907.
该研究以肾上腺素和氯化锌为前驱体,采用水热法合成了一种新型的锌掺杂碳点(Zn/NA-CDs),考察了Zn/NA-CDs的光学性质,并结合X射线光电子能谱技术(XPS)、透射电子显微镜(TEM)、傅里叶红外光谱(FT-IR)和X射线衍射(XRD)等表征手段研究了Zn/NA-CDs的结构特征。Zn/NA-CDs具有较高的荧光发射效率,量子产率达43.28%。氨基酸与邻苯二甲醛(OPA)反应生成席夫碱产物,该产物可对Zn/NA-CDs产生荧光增敏作用。基于此原理,在优化条件下,以甘氨酸为模型分子构建了针对游离氨基酸的荧光检测体系,甘氨酸质量浓度在2.5~250 mg/L范围内,与体系的荧光强度呈线性关系,检出限为0.6 mg/L。该方法可用于实际烟叶样品中氨基酸的测定,实验结果令人满意。
In this study,a new type of zinc-doped carbon point(Zn/NA-CDs) was synthesized by hydrothermal method using epinephrine and zinc chloride as precursor. The optical properties of Zn/NA-CDs were studied by UV-Vis spectrophotometry and fluorescence spectrophotometry. The structural characteristics of Zn/NA-CDs were studied by X-ray photoelectron spectroscopy(XPS),transmission electron microscope(TEM),Fourier transform infrared spectroscopy(FT-IR),and X-ray diffraction(XRD). Zn/NA-CDs showed a relatively high photoluminescent quantum yield of about 43.28%. In this study,amino acids could react with phthalic aldehyde(OPA) to produce schiff base products,which can produce fluorescence sensitization on Zn/NA-CDs. Under the optimal analysis conditions,with glycine as the model molecule,the fluorescence intensity of the system was linear with the concentration of glycine in the range of 2.5-250 mg/L,and the detection limit was 0.6 mg/L. The method can be used for the determination of amino acids in actual tobacco samples,and satisfactory test results were obtained.
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