is the supersensitivity of helium detector only a theoretical enunciation or an exploitable de vice for analytical purposes ? When a gas chroniatograph with nietastable He detector such as Fractovap mod. GH has the capability to run more than 50.000 (fifty thousand) analyses of 5 0 p p b of 0 2 in N2 with an accuracy of 1 % and n o maintenance at all, it demonstrates to be suitable not only for re search but for routine analyses too.
what are the embodiments of Fractovap mod. GH enabling such guaranteed performances?
ο Q-
very simple!!
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— A 100 % safe, long life injection valve avoiding any pollution into the carrier and sample gas streams. The same valve does not permit diffusion of sample gas in the carrier gas stream. — An ionization microcell r u n n i n g any time at the best working conditions.
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ANALYSIS OF CRYOGENIC OXYGEN
FRACTOVAP mod. GH CIRCLE 57 ON READER SERVICE CARD 76 A
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ANALYTICAL CHEMISTRY, VOL. 4 3 , NO. 7, J U N E 1 9 7 1
CARLO
ERBA
SCIENTIFIC INSTRUMENTS DIVISION P.O. Box 4342 - I 20100 MILANO
