has_column has_metric_category has_optional_column MS1 feature maximum intensity MS1 feature area XIC area normalized XIC area previous MSn-1 scan precursor intensity proforma peptidoform sequence table ID based metric QC2 sample metric QC2 sample intensities Observed intensities for the peptides of a QC2 sample measurement within 5 ppm and +/- 240 s RT tolerance. Different metrics of observed intensities are possible, at least one must be present. The table should contain the peptides as defined in the parent QC2 sample metric term, missing are interpreted as not detected. MS:4000079 MS