NEW
PRODUCTS
Process analysis. SCP series of process analyzers provides real-time process or environmental measure ments in situ. The SCP 1000 is a sin gle-beam photometric analyzer that can be used for on-line, nonintrusive measurements; SCP 2000 is a dualbeam analyzer that uses separate wavelengths for differential mea surements. Features include indus trial-grade components and selfchecking electronics diagnostics. Perstorp Analytical 413 Gene sequencing. GeneSprinter manual sequencer provides a com plete electrophoretic run in < 20 min and sequences 77% more base pairs in one-fifth the normal time. Other features include enhanced resolution, increased sensitivity, ninefold im provement in buffer heat dissipation, short fixation times, the ability to pour bubble-free gels as thin as 25 μπι, and lower volumes of radio active waste. Fotodyne 414
SDT 2960 thermogravimetric/differential thermal analyzer differentiates endothermic and exothermic events with no associated weight loss from those involving a weight loss. Analyses can be performed from ambient temperature to 1500 °C. TA Instruments 422
Colloidal dispersions. ESA-8000 is a computer-controlled instrument for determining electrokinetic prop erties of concentrated colloidal dis persions. The instrument can be used to characterize systems such as inorganic pigments, ceramic powder slurries, minerals, and magnetic me dia as well as particles dispersed in low-conductivity, low-dielectric, non aqueous media. Matec Applied Sci ences 415
Emissions monitoring. Model 6300 across-stack analyzer monitors pol lutants in both the visible and the IR ranges. The system meets all EPA Appendix Β and Appendix F require ments and can be used to monitor up to six components simultaneously. Opacity, NO, N0 2 , S0 2 , NH ? , CO, C0 2 , HC1, and HF can be monitored. Air Instruments & Measurements 419
LC. LCC-501 Plus controller fea tures a magnetically stirred 0.6-mL mixing chamber and continuous col lection of data from two monitors (e.g., a UV monitor and a pH monitor or two UV monitors). Peak start, peak end, and retention time or peak volume are marked on the chromatograms. Up to 50 method programs can be stored. Pharmacia Biotech 416
Software
Monochromator. Model AM-506 is a 0.67-m focal length scanning monochromator with an //4.7 or an //5.8 optical system. Features include 0.03-nm resolution, 1.25-nm/mm dispersion, ±0.005-nm reproducibility, and operating capabilities from the UV through the IR ranges. Options in clude multiport configurations and computer-controlled scanning. Acton Research Corporation 417 Polymer analysis. Polymer Addi tive Analyzer, a dedicated system for sample preparation and chromatog raphy, extracts and analyzes polymer additives by using a coupled SFESFC system that has a cryogenic trap
as the SFE-SFC interface. The in strument can also be coupled with a gas chromatograph to perform SFE-GC analyses. Extraction ves sels ranging in size from 150 μΐ, to 50 mL can be used. Suprex 418
X-ray fluorescence. XmaP soft ware, designed for use with Omicron microfluorescence XRF spectrome ters, acquires and displays elemental real-time X-ray fluorescence maps. X-ray maps can be displayed in a multidocument format to allow im age processing and statistical calcu lations on the data set. Principal component analysis is used to pro cess the raw data into component im ages from which phase images can be prepared; the phase images show dis tributions of elemental components within the sample. Fisons 420 Chemical reactions. Compuchem is designed to balance chemical equations, perform concentration calculations and compound dilutions, and solve gas volume problems. Re action equations can be up to 160 characters long and can contain pseudomolecules to force reaction conditions. A spreadsheet format is used for concentration calculations. Spectral Intelligence Corp. 421
846 A · ANALYTICAL CHEMISTRY, VOL. 64, NO. 17, SEPTEMBER 1, 1992
Curve deconvolution. Curvefit is curve deconvolution software based on the Levenburg-Marquardt non linear least-squares minimization algorithm. The software will fit Gaussian, Lorentzian, mixed Gaussian-Lorentzian, Voight, Pearson VII, and log normal peaks as well as baselines from simple offset to cubic polynomials. The software runs un der GRAMS/386 on 386 or 486 PCs. Galactic 423
Manufacturers' Literature AA. "AA Newsletter," Vol. 1, de scribes Models 4100 ZL and 5100 ZL graphite furnaces, electrodeless dis charge lamps, AA Benchtop and AA Reporter software, a high-sensitivity nebulizer, on-line sample preconcentration with FIA-flame AA, the USS100 ultrasonic slurry sampler, and an inorganic standard for the toxicity characteristics leachate procedure. 5 pp. Perkin Elmer 424 Automated analysis. Brochure de scribes precision analyzers for raw material and process control and for automated laboratory and environ mental analysis. InfraProver, InfraPrime, InfraAnalyzer, On-Line monitors, TRAACS 800, Auto Ana lyzer II, and Monitor 90 are featured. Technical processes include spectral scanning, filter analysis, colorimetry, and potentiometry. 20 pp. Bran + Luebbe 425 CE. Data sheet DS-824 describes high-sensitivity peptide mapping with CE using LIF detection on a P/ACE system. The usefulness of this technique for the analysis of peptide maps from extremely small amounts of peptide digest is dis cussed. 2 pp. Beckman 426
