Glass-made GC inlet liners provide chambers sample vaporizing and sample introduction into the column. Liners are the centerpieces of the inlet system and have a direct impact on application reliability and accuracy. It is recommended to change these liners as needed, to minimize the accumulation of carry-over contaminates inside them. Such accumulation can reduce peak height, cause peak tailing or generate ghost peaks.
Liners come in different lengths, diameters (OD/IDs), shapes, and surface deactivation for different instruments, sampling and applications. Choose your liner carefully to fitting both your instrument and application. For popular split injection applications, a single taped liner with a silanized glass wool insert is recommended, which should be used as much as possible to improve application result. For heavy boiling point samples such as petroleum, an LTV or PTV liner with a narrow volume is often selected. For samples containing active components such as strong base/acid, a straight-shaped liner is suggested. For most applications, regular liners have sufficient inertness for sample introduction to column. For aqueous samples, a large volume liner is recommended.
Sample Injection Volume (ul) Recommended Liner ID (mm)
More than 1 ul 4 mm (vol~800ul)
Less than 1 ul 2 mm (vol~200ul)
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