8 Maintaining the COC Inlet
Consumables and Parts for the Cool On-Column Inlet
Maintaining Your GC 121
Table 16 Recommended parts for injections onto 0.25-mm fused silica columns
Column type Part number
Insert, 0.25 mm id 19245-20515 (6 rings)
Septum nut, 250/320 µm 19245-80521
Syringe barrel, removable needle, 5 µL 5182-0836
Needle, 250 µm (3/pk) 5182-0833
Plunger button, 10/pk, for manual injections using syringe barrel 5182-0836 5181-8866
On-column insert spring 19245-60760
Table 17 Recommended parts for injections onto 0.2-mm fused silica columns
Description Part number/quantity
Insert, fused silica, 0.20 mm id 19245-20510
Cooling tower assembly 19320-80625
Syringe barrel, for fused silica needle, 10 µL 9301-0658
Replacement needles, fused silica, 0.18 mm 19091-63000 (6/pk)
Replacement PTFE ferrule for fused silica syringe 0100-1389
Removable stainless steel needle syringe, 10 µL 5182-9633
Replacement stainless steel needles, 0.23 mm 5182-9645 (3/pk)
On-column insert spring 19245-60760
Table 18 Recommended septa for the COC inlet
Description Part number/quantity
For 0.53-mm and 0.25/0.32-mm septum nuts
5-mm solid septum for manual and automatic injection 5181-1261
5-mm long-life septum 5183-4762 (50/pk)
5-mm advanced green septum 5183-4760 (50/pk)
5-mm, high-temperature, low-bleed septum 5183-4758 (50/pk)
5-mm through-hole septum for automatic injection 5181-1260 (25/pk)
For the duckbill septum
Duckbill septum for manual injection only (must use cooling tower with duckbill) 19245-40050 (10/pk)
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