programmable temperature vaporization (PTV) inlet

[chroma11]

Hi everybody!

What is the minimum ramp rate we can achieve with PTV? In book, it says 16 degree/sec. I am just curious if we can use slow ramp rate such as 3 degree /min to achieve some separation right at the inlet. Is this good idea?

regards,
Deedar

[Peter Apps]

The minimum rate will depend on the hardware and software that you have.

Any separation that you get in an unpacked inlet will be due only to fractional evaporation, which may or may not be enough for what you want to do. If you pack the inlet with an adsorbent or absorbent you have a very short, temperature programmable column that will have more of an effect.

Peter

[AICMM]

chroma11,

This is the idea for programmable inlets on SimDis instruments (in conjunction with oven programming) but I am not sure if you can do this with the Agilent PTV. This may be why they came out with the multi-mode inlet. So, in theory, yes you can do this but I don't know if the PTV is that capable. The other thing is that you must keep the oven cooler than the PTV or the oven will transfer heat to the PTV and mess up the programming.

Best regards.