ASK MATHESON... To get the most out of your gas chromatograph
Trapped in a maze of GC cure-alls? Matheson will get you out! IMPURE CARRIER GASES? Erase linger ing doubts. Your Matheson guarantee: An analysis on every cylinder of Ultra High Purity gas and Matheson Grade gas. Tried Matheson Grade Helium yet? Its minimum purity is 99.9999%. Using FID? Matheson purified zero gases include a hydrocarbon analysis in the price.
POOR FLOW CONTROL? Not with Mathe son N.R.S. Extra Low Flow valves. N.R.S. stands for Non-Rising Stem — a new fea ture to increase durability. There are also models with numerical counters. Very smooth, stable flow characteristics, repro ducible at any stem position or counter number. Controlling extremely low flows? Also try our Micro-Flow valves. A recently patented technique permits control of flows as low as 0.25 std. cc./min. of air.
CALIBRATION MIXTURE PROBLEMS? Send for Matheson's new booklet "Your Guide to Gas Mixtures". Learn gas mix ture technology and how it affects accu racy. Looking for the ultimate in accuracy and dependability? We have it — the Pri mary Standard. Made by weight (see book let) . . . at concentrations above 2% — a c c u racies of ± 0.02% absolute. A must for use with electronic digital integration systems.
FAULTY FLOW MEASUREMENT? Not with measurable linearity within 1 % . Matheson's newest mass flowmeter features a new lin ear transducer. No temperature and pres sure corrections necessary. No moving parts, and no projections or sensing ele ments in the flow stream. Adaptable direct ly to data reduction systems and totalizers.
REGULATOR TROUBLE? The last place you would look? Read on! Rubber dia phragms add impurities — they adsorb and desorb gases. The Matheson solution: use stainless steel. That's not all. All regula tors leak. Even small leaks cause GC drift. Matheson uses precision components and leak tests regulators for GC service. Our best — Model 3500. Designed for GC — extremely stable, stainless steel, and barely leaks (less than 2 χ lO-'Occ/sec. of helium).
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POOR HYDROGEN SOURCE? Your high est purity source (10 PPB impurities) is the new Matheson 8320 hydrogen generator. Features precision pressure regulation (± 0.025 p.s.i.) for GC applications. Produce what you need when you need it. Our next best? Matheson U.H.P. H2 99.999% min. in cylinders.
Ask Matheson . . . correct your trouble spots ι
LEAKY PLUMBING? You suspect this too. But you don't have an easy-to-use, sensi tive detector. Yet leaks cause GC drift. Find them with the Matheson Model 8013 leak detector. It's got a TC cell (just like some GC's) linked to a high gain amplifier (just like some GC's). It's stable. It's sensitive: 5:4x10-5 s i d . cc./sec. of helium.
MATHESON GAS PRODUCTS P. O. Box 85, East Rutherford, N. J. 07073 NAME FIRM ADDRESS
MATHESON GAS PRODUCTS
CITY
A Division of Will Ross, Inc., East Rutherford, N.J.; Cucamonga, Calif.; Gloucester, Mass.; Joliet, Ml.; LaPorte, Texas; Morrow, Ga.; Newark, Calif.; Whitby, Ont.
[—| Send for Matheson "trouble shooting" kit containing η d e p t h " answers to your GC system problems. L
Circle No. 45 on Readers' Service Card
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