For low-level analyses, Dohrmanns:
how to find the bad apple Don't let a "bad apple" jeopardize your plant, product, process or environment. Find that contaminated barge, storage tank, drum, or pipeline B E F O R E trouble begins. T h e " D O H R M A N N " will locate t h a t out-of-tolerance material rapidly. Each determination for total nitrogen, sulfur, or halogen takes less than 5 minutes.
(N, S, or halogen)
For over a decade the D O H R M A N N Microcoulometric Titrating System has proven to be the most powerful tool to achieve these exacting, specific, and quantitative results. Today's D O H R M A N N handles a wide range of materials—gases, high volatiles, liquids and solids. Natural gas, feed stocks, soils, food stuffs, and feeds, metals, pesticides, wastewater, seawater, polymerizing monomers, brine solutions, catalysts, and polymers pose no problems. Sampling systems are available for all types of materials. Prices begin at $ 7 1 0 0 . Circle '
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Microcoulometers, G C s and Organic Analyzers how much T O C before your sensitivity, (total organic carbon) sex, and gas in your water? chromatography
10 years of valve experience Man's nose "knows" the presence of as little as 10"18 grams of olfactory perceptive materials. The bee outdoes us by two orders of magnitude —10"20 grams of sex attractant turns him on.®
Find out the easy way with the DC-50, Envirotech's new organic analyzer. The DC-50 is based on hydrogen flame detection, recognized catalytic methods, and Dohrmann's 12 years of experience in pyrolysis chemistry. The measurements are simple, direct, and rapid (5 minutes per determination). Direct measurement. A single sample injection gives organic (or total) carbon content directly, not by difference. Direct readout. Four-digit presentation shows carbon content directly in mg/liter or ppm. Computer compatible with a digital printer available. R e l i a b l e sampling system. P l a t i n u m boat sample insertion avoids syringe fouling problems often associated with industrial and municipal waste water, brine, brackish and sea water. Accurate, reproducible results. Measure 1 to 2,000 mg/liter without dilution with a repeatability of * 1 m g / liter or ± 2 % . The procedure provides carbonate free determinations while retaining measurement of light hydrocarbons. Priced at $7,500, including start-up assistance and operator training. Circle #289
Send for your free copy of Dohrmann's new valve brochure. The widely-accepted line of Loenco valves is now manufactured on an expanded basis by Dohrmann. Choose from the industry's widest selection of multiport valves, including: · Rotary Multiposition (2 to 10) switching valves able to handle the most complicated switching/sample arrangements · Linear O-ring valves ranging from 6 port, 4 connection to 11 port, 11 connection · Linear sliding valves for precise volume sampling of liquids and gasses · Flow Divert valves. Features include · high pressure operation to 1000 psi · high temperature operation to 225° C · very low internal volume · resistance to chemical attack · high reliability.
But for wide application and high sensitivity, you cannot beat the D O H R M A N N 2400 Series Chromatographs. Eight separate detectors (or combinations thereof) provide unmatched sensitivity and applications versatility. Lowest noise, ultraprecise control, automatic operation and a multitude of additional features are standard.Prices from $ 1750 Circle # The Untouchable 15C-3 for less than $1400. Dual column, isothermal control + 0.05 °Cto400 °C, unmatched ruggedness and TC sensitivity (ultimate and totally useable) that no one can duplicate. Circle # 291 What more can be said? © Marton, L., National Bureau of Standards.
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ENVIROTECH DOHRMANN DIVISION ENVIROTECH CORPORATION 1062 Linda Vista Avenue, Mountain View, California 94040 (415) 968-9710, Telex 345 538 Cable DOHRMANN
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