Product Capsules Lubricants. Bulletin on greases to stop glassware leakage. Ρ 23 Mercury analyzers. Complete, selfcontained, low-cost system makes mer cury determination an inexpensive rou tine procedure. Sensitivity .01 μg of mercury. Bulletin. Ρ 37 Ovens. Dual thermostatic system re sponds to ±0.5° change in the chamber. Wall and bench models. Ρ 69
Let ISCO high ti: pressure you ί 4ψ9~"
Ovens. 35 models from 0.3 to 25.4 cu. ft. Bulletin. Ρ 158 pH meters. 12 models—analog to digi tal, and portable to expanded-scale re search, all guaranteed for 2 years. Ρ 31 pH meters. New digital-display models from advanced 4 and 5-digit meters to conventional analog display models. Ρ 68 ρ Η meters. All-purpose digital meter for pH and specific ion potentiometry. Ρ 171 pH papers. Indicators covalently bound to cellulose, are colorfast. Free sample. Ρ 89 Photon/ion counters. Systems start from quantum sensors and terminate at any desired single or multiple data re cording interface. Ρ 174 Pipets. Dispenser unit available in low-silhouette version in 1, 5, 10, 20, 50 ml with 1% accuracy, 0.1% reproduci bility. P108 Polarographic analyzers. Detect trace metals in water, as well as organics, in organics, pharmaceuticals. Ρ 160 Pumps. Detailed bulletins on selfpriming peristaltic, sealless, and chemi cally intert continuous-duty pumps. Ρ 124 Reagents. Over 10,000 organics, acids, inorganics, solvents, solutions, dyes in new catalog. Ρ 73 Reagents, diagnostic. Expanding line of reagent sets for clinical determina tions. Ρ 142 Recorders. Stop, record, digitize, and display even non-repetitive wave forms. Ρ 13 Recorders. Digital readout of pH and millivolts with 3V 2 digit nixie tube dis play. " Ρ 30
INSTRUMENTATION 4700 SUPERIOR
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ISCO instruments for high pressure l i q u i d chromatography give you high speed separation at low speed cost. Meter ing and gradient pumps operate at 2000 psi with single stroke piston construction to eliminate pulsation and dissolved gas; stainless steel columns have non-clogging supports and fittings with no dead volume or mixing. Effluent is monitored by a dual beam, high sensitivity UV photometer with seven absorbance ranges from 0.02 A to 2.0 A full scale, and instant wavelength selection of 254 nm, 280 nm or other wavelengths to 950 n m . The w h o l e chromatograph as pictured —pump, col umn (unpacked), photometer, recorder, sample injection valve, and degasser, with gauge and other hardware, costs under $3,450. Plug your present recorder into the photometer and save $750; or add less than $2500 more to include a fraction colector and electronic digital integrator with fully automatic com pensation for peak shape and baseline drift. Many additional features and options are available, all described in our current catalog. Send for your copy now.
SPECIALTIES
LINCOLN, NEBRASKA 68504
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COMPANY
PHONE (402) 434-0231
CIRCLE 9 5 O N READER SERVICE CARD
You get better results when you see things our way The new Luminon spectrophotometer cells feature fully fused quartz or glass s e a m s . . no low melting intermediate cements to cause problems. This also insures that the cells are impervious to cleaning x"1' solutions and other deteriorating media, i Luminon produces a complete line of cells for U.V., far U.V., near U.V., visible light and near I.R. And, if needed, we can produce customized cells to your specifications
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For information on our complete line of low priced cells, write today.
LUMINON, INC. 122Coit Street, Irvington, N. J. 07111 · 201 -373-4242 Associated fwith International Crystal Laboratories
Recorders. Fast response, single or 2 pen crossover recorders. Catalog. Ρ 58 CIRCLE 123 O N READER SERVICE CARD
ANALYTICAL CHEMISTRY, VOL. 44, NO. 3, MARCH 1972 .
113 A
