为实现啤酒中甲醛的快速检测，建立了一种基于功能化介孔二氧化硅纳米颗粒的石英晶体微天平气体传感器的检测方法。采用扫描电子显微镜、透射电子显微镜、氮气吸附脱附仪对材料进行表征，并分析该传感器对甲醛气体的气敏性能及其在啤酒中甲醛的检测效果。结果表明：介孔二氧化硅纳米平均颗粒直径约100 nm、孔径约3.5 nm，该传感器检测甲醛气体灵敏度高，检测限达0.5 mg/L，响应时间为7 s，恢复时间为12 s，选择性和稳定性良好；检测啤酒中甲醛时，每个样品在30 s内可以完成检测，且表现出良好的准确性和线性关系。

In this study, the rapid detection method based on quartz crystal microbalance gas sensor (QCM sensor) using amine-functionalized mesoporous silica nanoparticles as a sensing material was constructed for determination of formaldehyde in beers. The morphology structure and physicochemical property of materials were characterized by scanning electron microscopy, transmission electron microscopy and nitrogen adsorption-desorption. The formaldehyde sensing performance of NH2-MSN-based sensor and the detection of formaldehyde in beers were systematically investigated. The results showed that mesoporous silica nanoparticles had an average diameter of 100 nm and pore diameter of 3.5 nm, and the NH2-MSN-based sensors exhibited a low detection limit of 0.5 mg/L, a rapid response (7 s) and recovery (12 s), as well as excellent sensitivity, selectivity and stability. Furthermore, the as-fabricated sensors were utilized for determination of formaldehyde in beers. Each sample could be detected within 30 s and showed a good linear relationship. This method was fast, sensitive, and high efficiency, which had wide application prospect for the detection of formaldehyde in beers.