The discussion "Large Volume Injections" of Dec. 12, 2000 prompts me to espouse own experince with PTV (LVI, RLVI, KAS, etc.). In 1983 I tried to incite the founder of a company (which now makes the, most likely, best known PTV) to built a cold injector according to an idea I had. When some time later this company introduced a PTV I was quite disappointed. As a result, I gathered some people to help me realize the application of the idea: 1. The inlet consists of a steel tube which is also an electrical resistor, so that it can be heated in an impulse (not regulated as another inlet, later put on the market by yet another manufacturer); 2. this is to be connected to a two column in series system (or something similar) so that it can be charged without the problems mentioned in the LVI discussion of Dec. 12 (in backflow mode of the first column); 3. the tube is washed (hexane, etc.) with solvent while the cut is on the second, analytical column, the first being again on backflush. This prevents built-up of material that has given rise to discrimination and ghosting in a conventional injector.
In short, the system worked with a few minor faults. Unfortunately, duties changed so that there was no time to bring this to the point of worthiness for publishing. I am still looking for a person to cooperate or take over the project.