title: Determination of the chemical states of sulfur in ambient pollution aerosols by x-ray photoelectron spectroscopy.
mesh_terms: D000397:Air Pollution / Q000032:analysis*; D002140:California; D013057:Spectrum Analysis; D013431:Sulfates / Q000032:analysis; D013440:Sulfides / Q000032:analysis; D013455:Sulfur / Q000032:analysis*
chemical_list: D013431:Sulfates; D013440:Sulfides; D013455:Sulfur