Quantitative Determination of Hydroxymethanesulfonate (HMS) Using Ion Chromatography and UHPLC-LTQ-Orbitrap Mass Spectrometry: A Missing Source of Sulfur during Haze Episodes in Beijing

Hydroxymethanesulfonate (HMS), the product of HSO3– and SO32– reacting with dissolved formaldehyde in fog, cloud, and aerosol liquid water, has been suggested to be an important source of particula...