mass fragmentography

noun

mass frag·​men·​tog·​ra·​phy -ˌfrag-mən-ˈtäg-rə-fē 

plural mass fragmentographies

: the combination of gas chromatography and mass spectrometry used to isolate and quantify ionic fragments characteristic of particular compounds by examining a selection of ions having specific mass-to-charge ratios rather than examining a range of such ratios