SERIES
7620
GAS
CHROMATOGRAPHS
a measure of GC stability The surest way to test the overall stability of your gas chromatograph is to observe the detector baseline while you rapidly program the oven to a high temperature and back down again. We do it to every new HP Series 7620 GC during checkout. Results are typically like the trace shown here: less than 1 % detector baseline deviation during a 20°C/minute program from 100°C to 300°C and back to 100°C. In these days of almost universal use of electronic integrators and computers, this kind of GC system stability is more than just comforting. It's your assurance of qualitative and quantitative precision every time you run a sample . . . and that's the name of the game. Write for our new 18-page bulletin on the 7620: after you've read it, you'll know why the 7620 performs the way it does. Prices start at $5150 for a dual TC detector instrument. Hewlett-Packard, Route 41, Avondale, Pa. 19311. In Europe: 1217 Meyrin-Geneva, Switzerland.
HEWLETT
m PACKARD
ANALYTICAL
INSTRUMENTS
