has_column has_metric_category total ion current table ID free metric single run based metric multiple spectra based metric total ion current maxima per time ranges MS The maximum total ion current (MS:1000285) of all spectra in a single run in the given retention time ranges. The time windows are specified by the 2nd column defining the start time in seconds and the 3rd column defining the duration in seconds. To define a range from a starting time until the run's end, -1 may be used for the duration with 0 for the start. MS:4000205 Duration second