Manufacturers' Literature
Analyzer. Brochure provides detailed information about the Carlo Erba NA 1500 automatic nitrogen analyzer. It can be upgraded to determine either nitrogen or carbon or nitrogen, carbon, and sulfur. Comparative data for nine different substances analyzed by the NA 1500 and by Kjeldahl, ASTM, and other methods are given. 8 pp. Haake Buchler Instruments 431 Ultrasonic processor. Brochure describes four high-intensity ultrasonic processors used for ultrasonic cell disruption, homogenization, disaggregation, and liquid degassing. Also included are accessories and general information about ultrasonic processing. 8 pp. Sonics & Materials 432 Radioimmunoassay quality control. Application Note 511 details sources of error and describes their total effect on various analyte concentrations. The usefulness of information gained from standard, curve fit, and control samples is examined, and graphical techniques are covered. LKB Instruments 433 X-ray automation. Brochure focuses on the ThetaPlus system for automating X-ray diffractometers and the DataPlus system for X-ray spectrometers. Both systems include a high-speed microcomputer to perform analytical calculations and interfaces to control the goniometer. 4 pp. Dapple Systems 434 Image processing. Literature details the TN-5700 high-performance image-processing system, which integrates with a scanning electron microscope. It collects images, enhances them with the Kalman frame-averaging technique, and processes them with a variety of graylevel filters, gray-level transformations, binary filters, and image mathematics. Tracor Northern 436 Surface area analyzer. Pamphlet describes the Carlo Erba Sorptomatic 1800, a fully automatic, low-temperature gas adsorption-desorption surface area analyzer for porous solids. Included are graphs showing adsorption-desorption isotherms, pore distribution curves for different samples of activated carbon, and a schematic of 1800 series configurations. 8 pp. Haake Buchler Instruments 437
GPC. Product line bulletin describes the SynChropak GPC line of gel permeation HPLC columns and supports. Contents include theory; column, mobile phase, and flow rate selection; packing procedure; troubleshooting; column cleaning; applications; and a selected bibliography. 4 pp. SynChrom 435 Retention Times. Vol. 9, No. 1 features information on the 540/ultrasonic trace gas analyzer and applications using the universal LC-FID detector and selective photoconductivity. Also included is a FID-capillary method for quantitating complex hazardous wastes. 4 pp. Tracor Instruments 438
Catalogs Laboratory equipment. Catalog includes conventional, air bypass, auxiliary air, and perchloric acid fume hoods, as well as tissue culture, canopy, and demonstration hoods. Also featured are a self-contained modular clean room, laboratory furniture, emergency showers, and safety equipment. 40 pp. Hemco Corp. 440 Chromatography supplies. Products for sample preparation with solid-phase extraction, analytical and preparative HPLC columns and packings, TLC plates and sorbents, high-purity solvents, and biotechnology products for protein characterization and purification are featured in the 1986 catalog. 96 pp. J. T. Baker 442 Data acquisition. Hardware and data acquisition-graphics software for the IBM PC, XT, and AT microcomputers are described. General-purpose data acquisition software, menu-driven data acquisition and control software for gas and liquid chromatographs, and software for curve fitting and graphics plotting are included. 40 pp. Interactive Microware 444
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454 A • ANALYTICAL CHEMISTRY, VOL. 58, NO. 3, MARCH 1986
Biotechnology products. Catalog '86 details separations media and equipment, including chemicals, instruments, fittings, and accessories for LC, electrophoresis, and cell separation. Pharmacia 443 Eicosanold measurement. 1986 product catalog features the eicosanoid biosynthetic pathways chart and information about radioimmunoassay (RIA) kits and supporting reagents. Each RIA kit contains sufficient reagents for 100 assay tubes, including standard curves. Seragen 441 Chromatography supplies. Catalog describes packed GC columns, capillary columns, and HPLC columns; HPLC and GC accessories; and syringes, pipets, vials, reagents, and chemical standards. More than 40 pages of HPLC and GC column applications are included. 240 pp. Supelco 445 Laboratory supplies. Equipment for research, industrial, clinical, and analytical laboratories is included in the 1986-87 catalog. Developments in pH measurement, spectroscopy, thermometry, and water and salt analysis are featured. 88 pp. Markson Science 446 Monochromators. Catalog describes air path, vacuum, ultrahigh vacuum, and grazing-incidence monochromators, as well as related accessories. A reference chart showing the range of optical systems, light sources, detectors, windows, optical coatings, and other accessories is included. 32 pp. Acton Research Corp. 447 Mlcrodlspensers. 1986 catalog of precision laboratory microdispensers features a gel nanoliter pipet, microtest plate manifolds, glass microcapillary dispensers, disposable positive displacement micropipets, calibrated micropipets, and a variety of microliter liquid-handling devices. 20 pp. Drummond Scientific 448 Separations. Catalog is divided into six sections: chromatography, electrophoresis, immunoassay, molecular biology, HPLC, and liquids handling. Product specifications, applications literature, and ordering information are given. 272 pp. Bio-Rad 449
