NEW PRODUCTS
Catalysts. TEOM series 1500 pulse m a s s analyzer measures t h e real time mass changes of a packed bed of porous catalyst as the bed transforms reactant gases into products. Appli cations include absorption/adsorp tion studies and desiccant character ization. Rupprecht & Patashnick Co. 406
HS 40 static headspace sampler uses a pressure-balanced sampling technique that directly introduces the sample into the column without gas sample loops. Perkin Elmer 401
Instrumentation Titration. Metrohm 702 titrator fea tures set point and monotonie titra tion modes, a built-in polarizer for amperometric and voltammetric ti trations, method storage, and bi directional communication via an RS-232C interface. Brinkmann In struments 402
Proteins. GE 200 Mighty Fast Gel Eluter, which can be used to elute up to six samples a t one time, features recoveries of 8 0 - 1 0 0 % , a built-in 100-V power supply, and a user-pro grammable microprocessor. The sys tem does not require dialysis mem b r a n e s or h i g h - s a l t - c o n c e n t r a t i o n buffers. Hoefer Scientific I n s t r u ments 407 Microscopy. Low-temperature scanning tunneling microscope pro vides atomic-resolution imaging and spectroscopy capabilities a t regulated temperatures ranging from 4.6 Κ to room temperature. Applications in clude t o p o g r a p h i c a n d electronic characterization of superconductors, metals, and semiconductors. P a r k Scientific Instruments 408
Materials analyzer. MAS1000 is a MeV ion beam materials analyzer that provides stoichiometric, nonde structive elemental analysis of mate rials surfaces to depths of > 500 nm using Rutherford backscattering spectrometry. National Electrostatics Corp. 403
X-ray. X-CEM is an elemental anal ysis system for process control in the s m a l l - to m e d i u m - s i z e d c e m e n t plant. Based on an eight-channel si multaneous X-ray spectrometer, the system can be used to quantify the key constituents of raw materials, raw mix, or finished cement in 1 min. Philips Electronic Instruments 409
Sodium. Micro AI-9030 sodium monitor provides on-line continuous measurement of sodium ion concen tration over five switchable ranges covering 0.01 ppb to 10 ppm. The liq uid-handling system features a pumpless design and contains a heat exchanger to equate standard and sample temperatures. Waltron 404
Calorimeter. Model 4285 solution calorimeter, which operates over the range of 1-100 °C, is suitable for batch, incremental, or continuous ti tration experiments. Analytical and thermodynamic data can be obtained for almost any liquid-liquid or liq uid-solid chemical system. H a r t Sci entific 410
Mercury. MCA-90 mercury concen trator accessory traps mercury vapor on a specially designed gold collector for a programmable period; concen trated mercury is then stripped from the collector during a programmed heating period. Detection limits of 10 pptr can be obtained. Varian 405
Centrifuge. Optima XL-Α analyti cal ultracentrifuge includes a highintensity xenon light source, dif fraction-grating monochromator, light detector, and a software pack age t h a t controls t h e system a n d compiles data. Beckman Instru ments 411
686 A · ANALYTICAL CHEMISTRY, VOL. 63, NO. 13, JULY 1, 1991
LC. FC 204 fraction collector accom modates 176 18-mm tubes, 240 13mm tubes, or 432 10-mm tubes. The unit can be programmed for time, drop, or peak collection; up to 10 col lection windows can be defined in any mode. Gilson Medical Electronics 412 Interface. LC-Transform is an FTIR/HPLC interface designed to sepa rate the mobile phase from the solute in an HPLC effluent and to collect the resolved solute for FT-IR analy sis. The system is compatible with most commercial HPLC and FT-IR systems. ARIES 413 SEM. S-6180 scanning electron mi croscope accommodates 4-, 5-, 6-, and 8-in. wafers as well as holdermounted semistandard masks. Fea tures include 80-A resolution a t a voltage of 1 kV, a beltless cas sette, and an ultraclean, high-speed vacuum system. Hitachi Scientific Instruments 414
ACS Publications and Services T e a c h i n g resources. Free catalog lists curriculum materials and other s u p p l e m e n t a r y publications avail able from the ACS Division of Educa tion. Posters, bumper stickers, and magazines suitable for use with ele mentary and high school students are described. 16 pp. 415 Chemical Risk: A Primer. Written as an introduction to risk determina tion, this free information pamphlet p r e s e n t s t h e scientific issues i n volved in determination of health r i s k s r e s u l t i n g from exposure to chemicals. It also discusses public perceptions of risk and the use of risk assessment in public policy decisions. 12 pp. 416
Companies interested in a listing in this department should send their releases directly to ANALYTICAL CHEMISTRY, Attn:
New Products, 1155 16th Street, N.W., Washington, DC 20036.
NEW
PRODUCTS
Cambridge Isotope Labs your supplier for 13 12
alyzer. Sensitivity, reaction chemis tries, and applications are discussed. 12 pp. Hewlett-Packard 423 Peptides. Application note DS-786 discusses the separation of α-, β-, and γ-endorphins and their des-Tyr fragments by capillary electropho resis. Beckman Instruments 424
C & C
in the 90's announces: (CasribtoaiblLS and Carbon-12 NOW available from the world's largest facility for the separation of carbon isotopes 12,
13
Spectrovac 2000 is a 1-tn vacuum spectrometer designed for ferrous and nonferrous metals analysis. Precision of 0.5% RSD is typical for elements with concentrations >1%. Baird 417
1990 ACS Annual Report. Free publication describes ACS activities and programs supporting the science and profession of chemistry. A mem bership profile and a treasurer's re port are included. 32 pp. 418 Chemistry Teacher Education. Free booklet includes basic guide lines for the preparation and con tinuing education of high school chemistry teachers and recommen dations for mechanisms of implemen tation. 16 pp. 419
v>> in Kg quantities at 99.95 to 99.999% enrichments
Software
Ks gases, intermediates & a complete line of labeled compounds and biochemicals
Chromatography. Pyramid Chro matography Manager is a userconfigurable data acquisition and analysis system that provides multi tasking capabilities, full GLP compli ance, and direct control of most HPLC and GC components or sys tems. Axxiom Chromatography 420
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Please call now for % quotation on labeled starting materials or a custom synthesis. ********** Please inquire about our D, N, & Ο labeled compounds. For Your Free 1991-1992 Catalog Please Contact:
CIL CAMBRIDGE ISOTOPE LABORATORIES 20 C o m m i r o Way, Woburn, M a s u c h U M t t s 01801
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Chemicals. EMCIS, designed for use with IBM PCs and compatible computers, provides cross-referenced regulatory, storage, disposal, MSDS, worker safety, and emergency re sponse information for more than 4000 chemical products. Data on physical and chemical properties are included. EM Science 421 Statistics. Interactive Cluster Anal ysis (ICA) is a generic tool for classi fying members of a test population using nonhierarchical clustering analysis techniques. The software handles up to 25 attributes and 1000 cases. Dynacomp 422
Manufacturers' Literature Amino acid analysis. Brochure de scribes amino acid analysis using the AminoQuant Series II amino acid an
688 A · ANALYTICAL CHEMISTRY, VOL. 63, NO. 13, JULY 1, 1991
Chromatography. Retention Times, Vol. 14, No. 1, includes information on GC instrumentation, cholesterol analysis, and purge-and-trap con centrators. 4 pp. Tremetrics 425
Catalogs Instrumentation. Catalog features instruments for spectroscopy, chro matography, environmental analysis, and testing and measurement. Spec ifications and technical data are pro vided. 32 pp. Shimadzu 426 Laboratory equipment. Catalog lists immersion circulators; heating, refrigerated, and programmable baths; circulation systems; tempera ture cyclers; biological stirrers; and density gradient columns. 20 pp. Techne 427 Water analysis. Catalog features instruments, probes, and accessories for wastewater analysis and for field monitoring of groundwater and sur face water. 12 pp. YSI 428 Biomedical research. Catalog in cludes diagnostics, chromatography and electrophoresis equipment, monomers and polymers, and micros copy accessories. Polysciences 429 Isotopes. Catalog features enriched stable isotopes and stable-isotopelabeled compounds, including isotopic gas mixtures, NMR solvents, and deuterium-, 13C-, 15N-, and 1 8 0 labeled compounds. 80 pp. Isotec 430 Separations. Catalog includes elec trophoresis equipment, microscopes, centrifuges, forensic microtubes, fil ters, balances, and fume hoods. 32 pp. Whatman LabSales 431
For more information on instrumen tation and software products, and/or to obtain the free available informa tion on other listed items, please cir cle the appropriate numbers on one of our Readers' Service Cards.
