INSTRUMENTATION SPECIALTIES COMPANY

search, all guaranteed for 2 years. Ρ 31. pH meters. ... All-purpose digital meter for pH and specific ion ... You get better results when you see th...
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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

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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 .

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