Her main research concerns Aerosol, Mass spectrometry, Environmental chemistry, Analytical chemistry and Atmospheric sciences. She studies Aerosol mass spectrometry, a branch of Aerosol. Her Mass spectrometry study deals with Mineralogy intersecting with Ultrafine particle.
Manjula R. Canagaratna combines subjects such as NOx, Nitrate, Air quality index and Chemical composition with her study of Environmental chemistry. Within one scientific family, she focuses on topics pertaining to Ionization under Analytical chemistry, and may sometimes address concerns connected to Vaporization. Her studies deal with areas such as Ammonium sulfate and Ammonium as well as Sulfate.