The fluorescent properties of nitrogen doped carbon quantum dots (NCQDs) prepared through microwave assisted green method has been used as label free fluorescent probe for selective and sensitive detection of malachite green (MG) in water. The optical responses revealed that the NCQDs are highly stable and have good fluorescent quantum yield. The NCQDs were used to detect the Malchite Green in Mili Q water. Reduction in the fluorescence response was monitored in the range 17.12–128.43 μM of MG dissolved in Mili Q water. Linear response was observed in the range, 10–80 μM. The calculated value of limit of detection is 5.16 μM and the sensitivity is (0.03536 ± 0.00001) μM⁻¹. The future application of this work is that it can be employed to detect MG in the tap water and other natural sources of water.

通过微波辅助绿色法制备的氮掺杂碳量子点（NCQD）的荧光性质已被用作无标记荧光探针，用于选择性和灵敏地检测水中的孔雀石绿（MG）。光学响应表明，NCQD具有很高的稳定性，并具有良好的荧光量子产率。NCQD用于检测Mili Q水中的麦绿绿色。在Mili Q水中溶解的MG范围为17.12–128.43μM，监测到的荧光响应降低。在10–80μM范围内观察到线性响应。检出限的计算值为5.16μM，灵敏度为（0.03536±0.00001）μM ^-1。这项工作的未来应用是可以用于检测自来水和其他自然水源中的MG。