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mated standard preparation. The system can be converted to a plasma furnace atomic emission spectrometer (the Model AI 2000) with the addition of an optional rf plasma generator. Aurora • 404
High-resolution EELS The Model IB2000 is a high-resolu tion electron energy loss spectrome ter with a graphical user interface. EELS is used in surface analysis ap plications such as polymer and coat ings characterization and can be used at high resolution to map sur face structural and chemical features. Based on an instrument designed by Harald Ibach of KFA Jiilich, Ger many, the IB2000 operates in the range of 2.0-200 eV and provides guaranteed resolution of 2.0 meV at fwhm under UHV and standard oper ating conditions. Under optimum operating conditions, resolution ap proaches 0.98 meV. The spectrometer electrooptics are designed with a double-sector electron monochromator, and sample space between the monochromator and the detector has been increased from 25 to 40 mm in diameter to facil itate sample handling in the UHV environment. Dedicated software performs and tracks automatic tun ing of up to six lens voltages simulta neously and contains an "undo" func-
INSTRUMENTATION SPE LiChrolut SPE system is designed to pro vide consistent and reproducible condi tions for up to 12 simultaneous sample extractions. The system conditions car tridges, applies samples, washes the car tridges, and elutes and recovers analytes. Cartridges are available with a variety of reversed-phase packings for a range of analyte polarities as well as with tentacle ion-exchanger packings for biochromatog-
raphy. EM Separations • 401 Rl detection RI-98 Scope refractive index detector has an RI range of 1.00-1.75 and is available in three configurations for analytical, prepar ative, and both analytical and preparative 326 A
Viscometry
tion that lets the user reset the voltages to previous values in case of an error. The IB2000 can be con trolled from a keyboard or through a graphical user interface that operates under Apple System 7.1. Instrument electronics include electrooptical isolation for noise re duction and 16-bit A/D converters for precision voltage control. The spectrometer can be mounted on a flange and installed as a module in the user's UHV surface analysis chamber but is also available as a stand-alone unit with its own UHV chamber, accessories, and electro magnetic shielding. Electron
Analyzer • 402 use. The analytical model has the highest sensitivity and lowest flow rate of the three. The unit has 5 h of memory capac ity and includes an RS-232C interface. A chromatographic display for UV detection is available as an optional second channel.
SAS
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AAS The AI 1000 graphite furnace AA spec trometer uses transverse heating at a rate of > 3800 K/s for nearly isothermal atomization. The spectrometer system operates in the wavelength range of 185-850 nm and is controlled by Windows-based soft ware that performs D2 lamp background correction, automatic drift correction, data acquisition, and digital signal processing. An autosampler with a capacity of > 150 samples features random access, adjust able sample/reagent volume, and auto
Analytical Chemistry, Vol. 66, No. 5, March 1, 1994
Rheoflow PV100 is an on-line process vis cometer with applications in the paints and coatings industry. The unit analyzes materials with viscosities from 2 cp to 35 χ 106 cp and can operate in continuous or batch modes at temperatures from -25 °C to 300 °C. The viscometer can be used as a stand-alone unit or coupled with an electronics module for signal output to a central controller. It can be configured as an immersion unit in a reactor tank or a pipeline, or it can be placed in a loop out side the process line. Paar Physica
• 405 GC/MS and LC/MS VG Platform-2 benchtop quadrupole mass spectrometer contains a solids probe as well as GC and particle beam LC/MS in lets. The instrument performs EI and has a differentially pumped vacuum system for CI in negative and positive ionization modes. APCI and electrospray LC/MS inlets are also available. The system is PC controlled through the VG MassLynx Windows 3.0-based data analysis system.
Fisons • 406 LITERATURE NMR Brochure presents NMR sample tubes and accessories, including plain, valved, and threaded tubes; NMR sealing mani folds and adapters; a microcell; NMR pipets; and sample filters and funnels. 8 pp.
Kontes • 407 MS Application bulletin describes the use of a mass spectrometer that contains a closed ion source and detects contaminants at sub-ppm levels during sputter process monitoring and analysis of residual gases.
Leybold Inficon • 408
