NEW
Recirculating chillers are designed for use with lasers; electron micro scopes; and GC/MS, AA, and NMR in strumentation. The units provide 50015,000 Btu/h of cooling capacity over a temperature range of 0-40 °C. PolyScience 401
Instrumentation Cyclotron. Model AX-4500 electron cyclotron resonance source is de signed for low-energy processing with high ion current density. The source can be used with reactive gases, including fluorine and chlo rine. Specific applications include low-temperature dielectric deposi tion and etching of compound semi conductors. ASTeX 402 S o d i u m d e t e c t i o n . CFA-1011 so dium analyzer provides continuous measurement of low-level sodium in high-purity steam and water. Up to six different sample streams can be monitored with one instrument. Ionselective electrodes measure sodium in the low-pptr range. Solid-state s e n s i n g a n d reference electrodes eliminate the need for changing fill ing solutions. Scientific Instruments 403 LC. Model 340 LC solvent recycler decreases isocratic LC mobile-phase
PRODUCTS
consumption by up to 80%. An elec trically actuated valve placed down stream from the system's detector di verts contaminated solvent to waste or recycles clean solvent for reuse. Alltech Associates 404
9 0 - 9 8 % of total solids and > 99% of all bacteria, viruses, pyrogens, and organic compounds with molecular weights > 150. The system delivers up to 1000 gallons of purified water per day. Vaponics 410
MS. HAL/3F PIC series quadrupole mass spectrometers are designed for fast-event UHV gas studies. Soft ware capabilities include integration of desorption profiles, spectral sub traction, scaling, and superposition. Hiden Analytical 405
Particle size. Lab-Tec 1000 particle size analyzer measures up to 200,000 particles per second in 28 size incre ments. The system features a size range of 0.7-250 μπι, 20 different graphics displays, and a separate lap-top computer with a menudriven operating system. Lasentec 411
S p e c t r o m e t r y . SpectraPro i-series CCD imaging spectrographs feature triple indexable gratings, full wave length scanning, and a wide selection of accessories. Applications include monitoring and testing of plasmas, lasers, LEDs, and other lightemitting processes. Acton Research Corp. 406 S e n s o r s . Model PFS-2 monitoring system, designed for whole-organ or tissue-slice perfusion studies, fea t u r e s b i o c o m p a t i b l e micro flowt h r o u g h e l e c t r o d e s for pH, p 0 2 , p C 0 2 , and temperature. The system includes an output connector for di rect hookup to a strip chart recorder. Lazar Research Laboratories 407 E n v i r o n m e n t a l analysis. SAM-I is an IR-based ambient air monitor that features autozero adjustments, three-level alarm circuits, and flow loss indicators. Applications include the measurement of ppm levels of the environmentally safe refrigerants HCFC-123 and HCFC-134a. General Analysis Corp. 408 NMR. PCT-2000 series NMR ana lyzers are designed for process con trol and quality assurance applica tions. Components include a specially configured industrial com puter, a permanent magnet, rf elec tronics, and analysis-specific soft ware. Process Control Technology Corp. 409 Water. Labpure reverse osmosis sys tem uses cellulosic or polyamide spi r a l - w o u n d m e m b r a n e s to remove
498 A · ANALYTICAL CHEMISTRY, VOL. 64, NO. 8, APRIL 15, 1992
Optical analyzer. Lamda LS-2000 multichannel optical analyzer fea tures a 2048-element diode array, spectral response from 200 to 1100 nm, quantum efficiency of 65%, 5-ms read-out time, 12-bit analog-to-digi tal resolution, and multiple scanning modes. Alton Instruments 412
Software E l e c t r o n m i c r o s c o p y . NIST/NIH desktop spectrum analyzer and X-ray database features modes for both experiment simulation and data evaluation. The software is designed for Apple Macintosh II computers with a minimum of 4 MB memory. NIST 413 MS. BenchTop/PBM version 2.2 is a PC-based MS library search system that uses the Windows environment to combine PBM library search algo rithms with the Wiley Registry of Mass Spectral Data (5th éd.). Features include user library capabilities and a new m a s s c h r o m a t o g r a m display. Palisade Corp. 414
Manufacturers' Literature C h r o m a t o g r a p h y . Brochure highlights the Chromosorb Century series of porous polymer supports. Performance c h a r a c t e r i s t i c s , general applications, and retention indices are discussed. 36 pp. Celite Corp. 415
