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Programmable Temperature Vaporization (PTV) Injections

PTV injections differ from split and splitless injections in that with PTV the sample is injected

into a cold inlet. The inlet is then programmed to increase in temperature, often vaporizing

the solvent to vent, and then programmed to further increase in temperature to vaporize the

compounds of interest and introduce them onto the analytical column.

A number of different manufacturers offer PTV inlets, and liners for these inlets will vary

depending upon the geometry of the inlet. Certain features that almost all PTV liners have

include a small inner diameter and baffles or dimples on the inner surface of the liner. These

baffles/dimples increase the inner surface area of the liner, providing more space for the

sample to adhere as well as enhancing the heat transfer from the inlet to the sample as the

temperature of the inlet is increasing. When choosing a PTV liner, look for your specific inlet

manufacturer, then select a liner with Sky® deactivation and a small inner diameter that con-

tains at least one baffle or dimple.

By basing liner choice on injection type, you can quickly

identify the inlet liner style that will work best for your application.

For more on liner selection, including recommendations for gas

samples and direct injections, visit

True Blue Performance

Exceptionally inert Sky® inlet liners with state-of-the-art

deactivation improve trace-level analysis—

and now

come with a 100% satisfaction guarantee!*

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tech

tip

Correct installation of Sky® inlet liners is

quick and easy. Simply orient the liner so

the column installs toward the “R” on the

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