NEW PRODUCTS cusing power supplies for two orifice plates, and a temperature controller for temperatures < 300 °C. Spectrum Solutions 405
TSQ 7000 triple- and SSQ 7000 single-stage quadrupole mass spectrometers contain longer hyperbolic quadrupole rods for higher mass resolution and improved MS/MS spectra. An ion source with three inlet ports provides for easy switching among multiple interfaces. Sample inlets and ionization modes include GC with El and positive or negative CI, FAB and other direct insertion probes, and LC and SFC interfaces. The SSQ 7000 can be upgraded to a triple-stage quadrupole instrument. Finnigan MAT 402
Instrumentation V i s c o m e t r y . P o r t a b l e viscometer Model TT220 measures and controls viscosity and pH of aqueous fluids in process applications. The instrument consists of a viscometer probe with 0.5% reproducibility in the range of 5-25,000 cP and a detachable probe w i t h t e m p e r a t u r e a n d s e a l e d pH s e n s o r s . Both probes connect to a controller with a u t o t u n e d proportional integral derivative capability. The controller displays process variables and s e t p o i n t s continuously, provides alarms, and can be linked to a host computer via an R S - 4 8 5 port for remote process monitoring. Brookfield 401 Total nitrogen determination. RapidStill II is an automatic steam distillation unit for rapid Kjeldahl protein and nitrogen determinations. The u n i t h a s a b u i l t - i n d i s p e n s e r switch to control N a O H a d d i t i o n s and a manually set audible timer to i n d i c a t e t h e end of a d i s t i l l a t i o n .
S t e a m is produced by a n 1100-W h e a t e r element s u r r o u n d i n g a 1-L flask; a ventilation valve in the condenser prevents siphoning of distillate back into the condenser chamber. Labconco 403 LC. Flow-through conductivity monitor Model ICM-180 is designed to optimize separation and recovery of proteins in column chromatography and H P L C s y s t e m s . The u n i t d i s plays eluent conductivity for protein tracking during a run and has a dead volume of < 20 \iL to prevent remixing of the fractions. The cell h a s a zero-suppression feature, is biocomp a t i b l e , and a t t a c h e s to any s t r i p chart recorder. Lazar Research Laboratories 404 MS. E S P - 1 electrospray ionization source controller is designed to eliminate the need for connecting multiple individual control circuits to the source. The u n i t contains positive a n d n e g a t i v e h i g h - v o l t a g e power supplies for the discharge needle, fo-
AAS. SpectrAA-800 atomic absorption spectrometer with flame, graphite furnace, a n d vapor g e n e r a t i o n atomizers is designed for automated operation and multitasking. Narrow b e a m optics m a t c h each focusing mirror with an optical flat mirror to reduce coma, and a 0.33-m monochromator provides wavelength rep e a t a b i l i t y of +0.02 n m over t h e range of 1 8 0 - 9 0 0 nm. The system, which contains simple and advancedlevel software interfaces for u s e r s with varying levels of expertise, performs determinations in < 30 s with an autosampler t h a t accommodates up to five m a t r i x modifiers; it can perform as many as 20 protocols in a r u n . A d e d i c a t e d GFAAS s y s t e m with Zeeman correction is also available. Varian 406 X R F . X R F s p e c t r o m e t e r Model PW2600, designed for industrial use, determines elements from boron to u r a n i u m s i m u l t a n e o u s l y w i t h the use of as many as 28 fixed channels or a combination of fixed channels and one or more scanning goniometers. The spectrometer can determine one or more nonroutine elements independently or in conjunction with the fixed channels, investigate background and line overlap effects, and perform qualitative scanning or semiq u a n t i t a t i v e a n a l y s i s of u n k n o w n materials. A robotic sample changer provides random-access sampling of liquids, powders, and loose samples; t h e s y s t e m software includes calibration and matrix correction capabilities as well as a stored spectral database. Philips Analytical X-Ray 407 F l u o r o m e t r y . Microprocessorcontrolled fluorometer Model 6200 uses a 75-W h i g h - i n t e n s i t y xenon lamp in an ozone-free housing as its excitation source and a photomultiplier for emission detection. Inter-
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ANALYTICAL CHEMISTRY, VOL. 65, NO. 22, NOVEMBER 15, 1993 · 1005 A
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PRODUCTS many as 50 components in columns of up to 100 stages. User-selectable v a p o r - l i q u i d equilibrium methods include SRK, Peng-Robinson, Grays o n - S t r e e d , C h a o - S e a d e r , NRTL, UNIQUAC, Wilson, Van Laar, and UNIFAC. The software may be used for separation simulations in petrochemical, refining, and n a t u r a l gas applications as well as for p h a r m a ceutical separations; its databank of > 1300 components can be expanded. T h e p r o g r a m r u n s on a PC w i t h 640K RAM, MS-DOS 3.1 or higher v e r s i o n , a n d a m a t h coprocessor. Dynacomp 411
Evolved gas analysis furnace, an accessory for the TGA 2950 thermogravimetric analyzer, facilitates coupling to FT-IR or MS instruments for further analysis of decomposition off-gases. The quartz-lined furnace operates at temperatures from ambient to 1000 °C with heating rates up to 50 °C/min and can be used with a TGA autosampler. The furnace is cooled by purging with fresh air for turnaround times of < 15 min. TA Instruments 408
C h r o m a t o g r a p h y . EZChrom v3.0 chromatography data-processing and control software operates under Windows. The u p d a t e d version includes WYSIWYG custom report definition, data processing during chrom a t o g r a p h i c a n a l y s i s , and custom p a r a m e t e r definition. It also offers e n h a n c e d c a l i b r a t i o n a n d scaling methods such as average response factor, weighting, and square root of x. Shimadzu 412
changeable narrow-bandpass filters are u s e d to select e x c i t a t i o n a n d emission wavelengths in the range of 2 0 0 - 6 0 0 nm, and pairs for specific application wavelengths can be ordered. Accessories include an HPLC sampling module and sampling cells, and t h e fluorometer can be i n t e r faced with a PC. Jen way 409
Manufacturers' Literature
Software S p e c t r a l a n a l y s i s . GRAMS/386 v2.0 spectral analysis software contains an automatic spectral subtraction feature t h a t can d e t e r m i n e whether the subtracted spectrum is a significant component of the sample spectrum; the application provides a user override command. The peak deconvolution application has been updated with enhanced peak functions, a user-friendly interface, and an interactive mode for setting individual peak parameters. Fit parameters can be fixed or constrained, and the application can deconvolute an unlimited number of peaks in either spectroscopic or c h r o m a t o g r a p h i c data. The software r u n s on 386 and 486 PCs with Windows 3.0 or higher and a m a t h coprocessor. Galactic 410 P r o c e s s separations. "Multicompon e n t S e p a r a t i o n s P r o c e s s e s " software simulates the separation of as
SPE. Booklet outlines a step-by-step process for a u t o m a t i n g SPE m e t h ods. It describes a method for optimizing recovery and t h r o u g h p u t while minimizing interferences and carryover, and includes a case study in which an SPE method for a u r i nary metabolite is optimized and automated. 32 pp. Zymark 413
autosampler programming, and a graph showing results of a reproducibility test for the Model 507's injection modes. 4 pp. Beckman 415 GC. Newsletter describes a line of syringes for GC and HPLC, including small-volume, GC autosampler, and H P L C m a n u a l injection s y r i n g e s . O t h e r products featured include a sample diluter for HPLC, a syringe selection guide, and a syringe cleaning a n d m a i n t e n a n c e guide. 2 pp. Hamilton 416 GC. Catalog supplement describes GC i n s t r u m e n t a t i o n and supplies, including AutoSystem detectors, the Q-Mass 910 mass spectrometer, the ATD 400 t h e r m a l desorber, a headspace sampler, and Turbochrom chromatography workstations. Also included are products for SFE. 24 pp. Perkin Elmer 417
Catalogs Biotechnology. Catalog supplement presents products for biotechnology applications, including a UV t r a n s illuminator and a programmable t h e r m a l cycler for DNA amplifications, nitrocellulose blotting m e m b r a n e s and a p h o t o d o c u m e n t a t i o n s y s t e m for e l e c t r o p h o r e s i s , a n d a h a n d h e l d s c i n t i l l a t i o n counter for q u a n t i t a t i n g radiolabeled samples. The supplement also includes safety products. 39 pp. W h a t m a n Labsales 418
Microplate a s s a y s . Materials from a workshop entitled "Ultrasensitive Nonradioactive Microplate Techniques in Molecular Biology and Imm u n o a s s a y s " d e s c r i b e t h e u s e of luminometric and fluorometric detection in DNA analysis and immunoassays. Reagent stability and waste disposal for these methods are discussed, along with an evaluation of method sensitivities and the construction of immunoassays and DNA hybridization assays with the use of streptavidin solid-phase detection. Labsystems 414
E n v i r o n m e n t a l s t a n d a r d s . Catalog lists compounds and mixtures for environmental, i n d u s t r i a l hygiene, a n d p e t r o c h e m i c a l a n a l y s e s . EPA CLP 8000, 600, and 500 Series methods are presented in numerical order, w i t h lists of compounds to be monitored for each method and ingredients included in each standards mixture. Compounds not included in t h e p r e m i x e d s t a n d a r d a r e easily identified and can be ordered separately. The catalog also includes test mixes for monitoring HPLC and capillary GC column performance. 128 pp. Supelco 419
HPLC. Bulletin No. 7937A describes HPLC autosampler Models 502 and 507 and their integration with Gold software. Model 507 is designed with t h r e e injection modes for research and methods development, and Model 502 is designed for QC and routine analyses. The brochure cont a i n s s a m p l e software screens for calibration linearity, information on
C o l u m n C h r o m a t o g r a p h y . Catalog describes L a b - C r e s t laboratory supplies including pressure vessels, chromatography apparatus, volumetric glassware, vials, stopcocks and valves, j o i n t s , a n d p r e c i s i o n - b o r e t u b i n g . C h r o m a t o g r a p h y products listed include plastic couplings, borosilicate glass filters, and Solv-Seal joints. Andrews Glass 420
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