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Split/Splitless Inlets
The combined split/splitless inlet is the most popular inlet for capillary column gas
chromatography. Because it can be used in either split or splitless mode, it provides a very
effective combination that can cover most analysis requirements.
Split Inlet Troubleshooting
Split inlets are spared from most band-broadening phenomena, since the splitting process
generates narrow peaks. Peak broadening or tailing is usually due to:
• Improper column installation.
•
Low inlet temperature.
• Low split flow, (<20 mL/min on 6890).
• Inlet and needle discrimination and decomposition.
If your results are inaccurate or inconsistent:
• Check the column and reinstall if necessary.
• Increase inlet temperature by 50°C and compare results.
• Check inlets and needles for wear and replace as necessary.
Tips & Tools
For the most reproducible split injection results, try Agilent's low pressure drop
split liner (part number 5183-4647), with built in positioning bead, tight
dimension tolerances, glass wool placement and proprietary deactivation.
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