Direct Detection of Trace Amount of TNT on Various Surfaces Using Desorption Electrospray Ionization Mass Spectrometry

Rapid detection of trace amount of TNT on various surfaces was demonstrated using desorption electrospray ionization mass spectrometry without sample pretreatment. Under optimized working condition, the limit of detection was found around 0.1-10 fg as total amount, and the time consumed for single sample analysis was about 1.5 s.