Editing Ion source (section)

====Aerosol ionization====
In [[aerosol mass spectrometry]] with time-of-flight analysis, micrometer sized solid aerosol particles extracted from the atmosphere are simultaneously desorbed and ionized by a precisely timed laser pulse as they pass through the center of a time-of-flight ion extractor.<ref>{{Cite journal | doi = 10.1016/0021-8502(94)00133-J | title = On-line chemical analysis of aerosols by rapid single-particle mass spectrometry | date = 1995 | author = Carson, P | journal = Journal of Aerosol Science | volume = 26 | pages = 535–545 | last2 = Neubauer | first2 = K | last3 = Johnston | first3 = M | last4 = Wexler | first4 = A | issue = 4 | bibcode = 1995JAerS..26..535C }}</ref><ref>{{Cite journal | doi = 10.1016/S0021-8502(00)90189-7 | title = Real time monitoring of size-resolved single particle chemistry during INDOEX-IFP 99 | date = 2000 | author = Guazzotti, S | journal = Journal of Aerosol Science | volume = 31 | pages = 182–183 | last2 = Coffee | first2 = K | last3 = Prather | first3 = K | bibcode = 2000JAerS..31..182G }}</ref>