A dual-model fluorescent probe for formaldehyde has been developed. With excitation at 365 and 400 nm respectively and upon addition of formaldehyde, the fluorescent probe displays off-on fluorescence responses at 415 and 505 nm. Formaldehyde can be detected quantitatively in the concentration range from 0 to 2.7 × 10⁻² M and the detection limit on fluorescence response of the probe can be as low as 6 μM. The proposed method was successfully employed for preliminary application in several commercially available foods.

中文翻译：

---

具有双重发射增强特性的HCHO反应分子可定量检测接近100％水溶液中的HCHO

已开发出一种甲醛双模荧光探针。分别在365和400 nm处激发并添加甲醛后，荧光探针在415和505 nm处显示关闭的荧光响应。可以在0至2.7×10 ^-2  M的浓度范围内定量检测甲醛，并且探针的荧光响应检测限可以低至6μM。所提出的方法已成功地用于几种商业食品中的初步应用。