The uptake and reaction of methanol at the air-liquid interface of 0 to 96.5 wt% sulfuric acid (SA) solutions has been observed directly using vibrational sum frequency generation spectroscopy (VSFG) and Raman spectroscopy. Evidence for the formation of methyl hydrogen sulfate (MHS) was obtained by the presence of a new peak in the 800cm-1 region, not present in either the neat methanol or concentrated sulfuric acid spectra. This peak is attributed to the singly bonded OSO symmetric stretch of MHS. The maximum yield of MHS with a large SA excess (7 SA : 1 methanol) is shown to be (95 ± 5) % at –(15 ± 2) º C. No evidence was found to suggest formation of dimethyl sulfate.
在一篇ELSEVIER发表的题为“SARS-CoV-2 RNA detection in the air and on surfaces in the COVID-19 ward of a hospital in Milan, Italy”的文章中,首次提出了新冠病毒能通过物体表面及空气进行传播的理论,这对患者及医护人员的保护和公共卫生管理都具有深远意义。该研究结果进一步佐证了使用赛多利斯Airport MD8空气气溶胶采样器 有效采集监测新冠病毒的重要性,这对深入了解病毒传播途径及规避污染风险有重要作用。