PRODUCT CAPSULES Short "refreshers" on last month's ads. Obtain free information on any of the products or services described by writing in the appropriate key numbers in the "Product Capsules" portion of the reply card preceding this section.

Adsorbents. 32-page book on T L C . Ρ 160

Absorbents. Technical paper on puri­fication of solvents by active alumina.

Ρ 194

Amino acid analyzers. Complete line of automatic recording units. Ρ 172

Amplifiers. Measures 25nV to 1 V with differential input, has reference channel. Ρ 101 Analytical services. Reprints of pa­pers offered on the solution of pharma­ceutical problems. Ρ 193

Balances. Data on 38 basic models. Ρ 121

Balances. Brochure on top-loading op­tical projection balance with 0.1 g ac­curacy. Ρ 176

Balances, analytical. Fully automatic arrestment and beam release mecha­nism. Ρ 169

Baths. 7-1/., gallon capacity with temp range - 2 0 ° to 70°C ± 0.02°C. Ρ 56

Bombs. Acid digestion bomb dissolves refractory materials in strong mineral acids. Ρ 151

Calculators. Unit with built-in logs, exponents, trig, storage, and program­ming. Ρ 192

Calorimeters. Economy-priced unit with precision temperature control.

Ρ 174

Chemicals. Price list features ion ex­change resins, anion and cation in 44 types and bead sizes. Ρ 29

CHN analyzers. Fully automatic, un­attended unit for CHN+O determina­tions. Ρ 50 Chromatographs, gas. Literature on complete line of columns, fittings, valves, pressure regulators. Ρ 36 Chromatographs, gas. Data on au­tomatic, completely modular instru­ment. Ρ 81 Chromatographs, gas. Direct-read­ing controls, parametric amplifier, and 10-volt output for computer compati­bility. Brochure. Ρ 141 Chromatographs, gas. Computerized instrument handles S gas chromato­graphs simultaneously. Ρ 145

Chromatographs, gas. Low-cost unit has automatic sampling, meets all-glass requirements, mates with mass spec­trometers. Ρ 179 Chromatography, gas. Product and applications bulletin on 3 tvpes of units.

P 5 5 Cleaners. Phosphate-free, biodegrada­ble liquid detergent. Ρ 4 Computers. General-purpose, mobile, minicomputer. Ρ 43 Coulometers. Solid state system in­cludes potentiostat and integrator.

Ρ 123 Cryogenic units. Details on liquid helium transfer and cooling system.

Ρ 10 Cryogenic units. Module furnishes temperature and environmental control for spectrometric samples. Ρ 34 Densitometers. New unit with high-density absorbance recording and built-in calibration standards. Ρ 86

Desiccants. Dries air and gases to ter­minal dryness of 0.005 mg per liter of gas. Ρ 77 Detectors. New IR unit identifies GC peaks. Scans 2.5μ to 15μ in six seconds.

Ρ 150

Dewars. Catalog on new patented he­lium dewar flasks. Ρ 102

Digital readout. New unit is a linear/ -Hog/—log device operating on 1 volt or 100 millivolt input from broad range of spectrophotometers. Ρ 178

Digitizers, photographic. Data on electro-mechanical, high-speed, high-ac­curacy unit for image processing. Ρ 149

Dosimeters. Direct-reading unit mea­sures exposure to x-rav or radio-activ­ity. Ρ 1 73

(Continued on page 112 A)

CIRCLE 38 O N READER SERVICE CARD

ANALYTICAL CHEMISTRY, VOL. 43, NO. 6, MAY 1971 • 111 A

CARVER LABORATORY PRESS World's most widely used press for R & D , testing compounds, laminating, shear and break tests, pilot runs, etc. New features include air operated quick-closer, constant pressure devices, complete motorization package. Capacit ies to 25 tons.

NEW BULLETIN AVAILABLE Contains complete details and prices Send for free copy today

FRED S. CARVER INC. 54 River Road, Summit, New Jersey 07901

a subsidiary of S t e r l i n g , I n c . Milwaukee, Wisconsin

Product Capsules

(Continued from page 111 A)

Electro-analysis apparatus. Provides 2 simultaneous determinations for nickel, copper, lead, other metals. Ρ 48

Electrodes, graphite. Details on high-purity, precisely machined units. Ρ 187

Electrodes, ion. Data file on selective ion units. Ρ 18

Electrodes, ion. Details on full line of ion-selective units. Ρ 153 Electrodes, pH. Broad line of pH, reference, and combination units. Ρ 17

Electrometers. Brochure on 3 new units with sensitivities to 1 mV FS.

Ρ 159

EPR cavities. Data on high Q, versatile units. Ρ 189

Filter papers. Catalog on filter pa­pers, specialties, papers for electro­phoresis and chromatography. Ρ 164

Filter papers. Free sampler includes black, white, blue papers and conver­sion table. Ρ 166

Filters. Catalog and applications guide on ultra-filtration systems. Ρ 2 Fraction collectors. Compact units use 200 to 400 tubes, provide drop, time, volume methods of collection.

Ρ 23

Fume Hoods. 4 types in 3 lengths for use in air-conditioned labs. Ρ 100

Furnaces. Catalog on 3 interchange­able furnaces which determine melting temperatures automatically. Ρ 122

Furniture. Literature on complete line of interchangeable units. Ρ 20 Gamma counters. Literature on com­plete nuclear spectroscopy systems.

Ρ 135

Gases. Helium gas for use with chro­matographic separations. Ρ 5

Gases. 104-page catalog on specialty gases and equipment. Ρ 8

Gases. Information on complete line of listed gases. Ρ 126

Glassware kits. Data on organic chemistry glassware accessories. Ρ 191 Hot & cold stages. Maintains exact temperature throughout observation.

P 3

Hot plates. Low-cost unit provides precise temperature control. Ρ 180 Ion exchangers. Bulletin describes 5 different ion exchange cartridges. Ρ 87 Integrators. Electronic unit for use with chromatography detectors. Ρ 86

Labels. Brochure, samples on self-sticking consecutive number labels.

Ρ 155

Lamps. Literature on hollow cathode units for 47 different elements. Ρ 78

Lamps. Data on hollow-cathode units usable in all makes of AA equipment.

Ρ 139

Lamps. Literature on UV lamps, me­ters, and fluorescent darkrooms. Ρ 186

Lubricants. Bulletin on greases to stop glassware breakage. Ρ 28

Melting point apparatus. Data on in­terchangeable modular units. Ρ 121

Mercury analyzers. Compact, low-cost, self-contained unit. Ρ 35

Mercury analyzers. AA spectropho­tometer kit for mercury and arsenic analyses. Ρ 185

Monochromators, scanning. Digital readout of wave length and slit. 6 drive speeds. Ρ 124

O-rings. Details on new V 4 " silicone rings for GC. Ρ 6

pH meters. Data file provides info on wide line. Ρ 19

pH meters. Low-cost, general-purpose units with 0.01-0.001 pH resolution over the 0-14 range. Ρ 37

pH meters. Details on six different units. Ρ 171

Photometers. Ratio-photometer con­verts any monochromator into a double-beam spectrophotometer. Ρ 124

Pipettes. Units for transferring and dispensing acids, solvents. Also, liq­uid-dispensing unit. Ρ 63

Polarographic analyzers. Unit has high P.P.B. sensitivity. Ρ 158

Pumps. Solid state unit produces peri­staltic effect without liquid coming in contact with pumping mechanism. Bulletin. Ρ 64

Pumps, metering. 3 units with flow capacity from 1.5 to 650 ml/hr/vein.

Ρ 24

Reagents. Rare earth dipivaloyl-methane complexes and heptafluorodi-methyloctane dionates. Ρ 7

Reagents. Literature on reagents for acrylamide-gel electrophoresis. Ρ 49

Reagents. Catalog features reagents for all GC analysis. Ρ ' 54

Reagents. Handbook on silyation and other special techniques of gas phase analysis. Ρ 157

Recorders. Record waveshape infor­mation and single transient events.

Ρ 22

Recorders. Low-profile unit with ver­tical chart travel. Ρ 109

Recorders. Flat-bed recorders with retractable tilting bracket. Ρ 110

Recorders. Flat-bed unit with hori­zontal chart travel. P i l l

Recorders. X-Y plus X-t unit. Ρ 112

Recorders. Unit records the logarithm of absorbance as a function of wave­length. Ρ 167

Recorders, plug-in. Details on 5-inch and 10-inch units with 1 to 100 milli­volt sensitivity. Ρ 80

Samplers, GC. Brochure on convert­ing chromatograph into automatic liq­uid sampling system. Ρ 76

Samplers. Automatic system for AA and emission analysis. Ρ 85

Scanners. Data on electro-optical drum scanner for digitizing photo­graphic data. Ρ 149

Signal averagers. Unit offers flexibil­ity with range of plug-in modules, read­out capabilities. Brochure. Ρ 57

Solvents. 56-page reference book on spectrophysical properties, specs, and typical uses. Ρ 127

Spectrometers, emission. Cassette unit measures up to 10 elements at once. Plug-in cassettes for additional 10-element groups. Ρ 170

Spectrometers, ESCA. Reads out bind­ing energies of electrons with high reso­lution. Brochure. Ρ 196

Spectrometers, LEP. Low energy pho­ton system with mercury detectability limits"better than 50 PPM. Ρ 148

Spectrometers, NMR. Frequency vari­able 3-100 MHz, crystal controlled, in steps of 1 Hz. Ρ 30

Spectrometers, NMR. Data on low-cost, easy-to-operate unit. Ρ 140

Spectrometers, x-ray. Unit provides fast, accurate, totally non-destructive materials analysis. Ρ 134

(Continued on page 113 A)

112 A • ANALYTICAL CHEMISTRY, VOL. 43, NO. 6, MAY 1971

Product Capsules

(Continued from page 112 A)

Spectrometers , x -ray . Information on 4 types of x-ray units . Ρ 1 5 2

Spectrometers , x -ray . Brochure on fully au tomated systems. Ρ 1 6 8

Spectrophotometers , AA. Uni t fea­tures signal integration, zero and con­tinuous scale suppression, direct read­out, flame emission. Ρ 3 2

Spectrophotometers , AA. Four new units and 2 high-sensitivity sampling systems. Da ta . Ρ 1 4 6

Spectrophotometers, fluorescence. Uni t makes direct comparison of fluo­rescence excitation and U V / V I S a b ­sorption spectra. Brochure, technical repr int . Ρ 1 4 2

Spectrophotometers , IR. Uni t pro­vides unrestr icted selection of instru­menta l parameters . Ρ 1 4 4

Spectrophotometers , NMR. Circle P91 for free Fourier Transform 1 3 C spectra catalog. Ρ 91

Spectrophotometers , TLC. Uni t mea­sures chromatographic separations by transmission, reflectance, or fluores­cence. Ρ 2 0 0

Spectrophotometers , UV/VIS. Direct meter readings in concentrated linear absorbents and t ransmit tance . Ρ 2 6

Spectrophotometers , UV/VIS. 3 units go from 325 to 925 nm, have digital readout. Catalog. Ρ 2 7

Spectrophotometers , UV/VIS. Unit for gel scanning, sampling, t empera ture control. Ρ 6 5

Spectrophotometers , UV/VIS. New, low-cost series of modules for various uses. Free catalog. Ρ 7 9

Spectrophotometers , UV/VIS. Un i t combines double beam performance with double-wavelength capabilities. Brochure. Ρ 1 4 3

Spectrophotometers , UV/VIS. 4 mod­els with double monochromators and dual beam photometric systems. Ρ 1 9 7

Spectroscopy, fluorescence. Bulletin on atomic fluorescence system. Ρ 1 7 7

Spectrum ana lyzers . Low-cost uni t fits most mono-, bino-, and trinocular microscopes. Ρ 5 4

Sulfur determinators . I E detection system cuts to 60 seconds or less t ime required for determinations. Ρ 108

Supply house . D a t a on newly merged, coast-to-coast supply house. Ρ 181

Supports, GC. Bulletin on 5 grades of polymer suppor ts . Ρ 9 2

Thermal analys is sys tem. Modular , solid-state uni t has push-but ton opera­t ion with digitally set t empera tu re l im­its. Ρ 4 4

Thermal ana lyzers . D a t a on system tha t provides simultaneous T G / D T G / D T A on single sample. Ρ 121

Thermometers. Catalog on 50 ther­mistor probes and ins t ruments . Ρ 195

Timers. Viscosity uni t s tar ts and stops automatically, is accurate to .02% ± .01 seconds. Ρ 1 9 0

Titrators. D a t a on low-cost endpoint system. Ρ 16

Titrators. Automatic recording unit with interchangeable, snap-in bure t units. Ρ 21

Titrators. Automatic Kar l Fischer unit with digital readout . Ρ 1 5 6

Traps, filter. Dries and filters gas s t ream in pressurized flow system. Ρ 3 3

Tubing, plastic. Flexible, chemically inert tubing in 74 s tandard sizes.

Ρ 1 3 6

W a r e , plastic. New 84-page catalog on complete line of plastic labware.

Ρ 2 5

Product Capsules

with a fully automatic PARR® Adiabatic Calorimeter

. . . and a PARR® Digital Thermometer

Parr now offers a completely new oxygen bomb calorimeter for measuring the cal­orific or Btu value of coal, oil, jet fuels, foods and other solid or liquid samples. A new solid-state automatic temperature controller eliminates all time consuming temperature adjustments, doubles the output and improves the repeatability in calorimetric tests.

A new Parr Digital Thermometer and Printer add speed, convenience and accuracy to any bomb calorimeter by displaying temperatures in bright, easily seen numbers readable to .001 ° C, and producing a printed record of all read­ings taken during a calorific test.

Ask for our latest calorimeter catalog.

PARR INSTRUMENT COMPANY 211 Fifty-Third St. Moline, I I I . 6T265

Telephone ( 3 0 9 ) 762-7716

CIRCLE 143 O N READER SERVICE CARD ANALYTICAL CHEMISTRY, VOL. 43, NO. 6, MAY 1971 • 113 A

Parr

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