Capillary columns for GC. Low bleed columns with equal selectivity see OPTIMA 17 MS. Similar phases: OV-17, DB-17, HP-50+, HP-17, SPB-50, SP-2250, Rtx-50, Rxi-17, CP-Sil 24 CB, 007-17, ZB-50. Max. temperature for isothermal operation 320 °C, Max. temperature for short isotherms in a temperature program 340 °C. 0. 53 mm ID columns: max. temperatures 300 and 320 °C, resp.