In order to visualize products being separated during column chromatography, a detector is required. Some techniques are destructive, and therefore consume or degrade the sample upon detection, and some are non-destructive. Please place the following techniques into the correct category. Mass spectrometry
_(_())_(_())Spectrophotometry
_(_())_(_())Fluorescence
_(_())_(_())Electron capture
_(_())_(_())Flame ionization
_(_())_(_())Conductivity
_(_())_(_())Refractive index
_(_())_(_())