High-resolution EELS

LiChrolut SPE system is designed to pro ... and is controlled by Windows-based soft ware that performs D2 ... monitoring and analysis of residual gase...
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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