School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, People's Republic of China.
School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, People's Republic of China; GDPU-HKU Zhongshan Biomedical Innovation Platform, Zhongshan 528437, People's Republic of China.
Food Chem. 2023 Nov 15;426:136604. doi: 10.1016/j.foodchem.2023.136604. Epub 2023 Jun 20.
A ternary deep eutectic solvent (DES) consisting of choline chloride, lactic acid, and urea in a molar ratio of 1:2:2 was used to pretreat chamomile residue, followed by carbon dots (CDs) preparation using a one-pot solvothermal method. The CDs prepared under the suitable conditions had a high quantum yield of 47.34% and could be used as a bifunctional fluorescent probe for the detection of tartrazine and Fe(III). The concentration of tartrazine or Fe(III) had a good linear relationship with the fluorescence intensity of CDs that the determination coefficient (R) was 0.9957 and 0.9943, and the limit of detection (LOD) was 40 nM and 119 nM, respectively. After verifying the different fluorescence quenching mechanisms of CDs by these two substances, a quantitative analysis was performed on real samples with recoveries of 90.70%∼104.29%. Overall, this study provided a promising technology for chemical conversion from low-cost chamomile residue to attractive bifunctional fluorescent probe.
采用摩尔比为 1:2:2 的氯化胆碱、乳酸和尿素组成的三元深共晶溶剂（DES）预处理甘菊残渣，然后通过一锅溶剂热法制备碳点（CDs）。在合适条件下制备的 CDs 具有 47.34%的高量子产率，可用作检测柠檬黄和 Fe(III)的双功能荧光探针。柠檬黄或 Fe(III)的浓度与 CDs 的荧光强度呈良好的线性关系，其测定系数（R）分别为 0.9957 和 0.9943，检测限（LOD）分别为 40 nM 和 119 nM。验证了这两种物质对 CDs 不同的荧光猝灭机制后，对实际样品进行了定量分析，回收率为 90.70%∼104.29%。总的来说，该研究为从低成本甘菊残渣转化为有吸引力的双功能荧光探针提供了一种有前景的化学转化技术。
