S p e c t r o m e t r y . MultiSpec 257 im aging spectrograph is designed to acquire spectra from multiple fiber optic inputs from CCDs. The spectro graph contains a microprocessor and toroidal optics for spectral imaging over an area of 25 χ 10 mm. It uses single, d u a l , t r i p l e , or q u a d r u p l e grating turrets and integrated filter wheels for automatic grating and fil ter selection. An internal shutter is included for dark current measure ments and readout of frame images transferred from CCDs. Oriel 407 S p e c t r o p h o t o m e t r y . Spectropho tometer system Model DPA20 is de signed for applications such as flow injection analysis and spectroelectrochemistry. The compact system (11 χ 16 χ 16 cm; 5 kg) c o n t a i n s a 1024-element CCD detector, a min iaturized optical system t h a t scans in t h e v i s i b l e ( 4 0 0 - 7 0 0 n m ) a n d short-wavelength near-IR (6001100 nm) regions, and a programma ble detector exposure timer for data acquisition from 200 spectra/s to 1 spectrum/min. The DPA20 can per form real-time spectral averaging for u p to 65,535 s p e c t r a ; acquire one spectrum while downloading another to a host PC; and control and moni tor pumps, valves, potentiostats, and temperature and pH sensors via 16 d i g i t a l a n d 4 a n a l o g I / O control lines. DSquared Development 408 HPLC. Mistral column thermostat is designed to permit HPLC analyses at ambient and subambient temper a t u r e s . It uses P e l t i e r cooling for t e m p e r a t u r e s down to 5 °C a n d forced air convection to produce tem peratures from 5 °C up to 90 °C with an accuracy of ± 0.1 °C. The Mistral is microprocessor-controlled and can be programmed with up to five dif ferent temperature profiles in incre ments of 0.1 CC and 1 min. The ther mostat accommodates most HPLC systems and can be used in conjunc tion with a u t o s a m p l i n g s y s t e m s . Euramark 409 C h r o m a t o g r a p h y . LabQuest 486 PC data station for chromatographic data acquisition and analysis obtains data from up to four gas chromatographs and eight detectors simulta neously. M e n u - d r i v e n W i n d o w s based software allows the user to set up multiple detection p a r a m e t e r s and processing functions. The sys tem performs data security and va lidity checks, provides authorized user access, and records system per formance. Stored data can be t r a n s ferred to active spreadsheet or word
processing software while a n o t h e r application is r u n n i n g , and ASCII chromatograms can be imported for analysis. Tremetrics 410
Software Data analysis. S-Plus v3.1 for Win dows is a data analysis and statistics software package for 386 or 486 PCs. The upgrade adds ANOVA and re lated statistical functions, fraction ally differenced ARIMA models, and model-based Gaussian hierarchical c l u s t e r i n g , a s well a s c o m p u t i n g functions such as integration, opti mization, multivariate minimization with bounds, and complex numerical linear algebra support. The Windows version includes displays of multiple graphics windows on screen, online help and hypertext links, and cutand-paste functions for transferring text between S-Plus and other appli cations. Statistical Sciences 411 C o n f o r m a t i o n p r e d i c t i o n . Unity chemical information software per forms flexible algorithmic searching of 3D conformations of structures in a chemical database to select com pounds capable of achieving a que r i e d g e o m e t r y . T h e software can s e a r c h a n d t e s t u p to 100 s t r u c tures/s using analytical derivatives to m i n i m i z e e n e r g y in t o r s i o n a l space. Tripos 412 Chromatography. Updated version of G r a m s / 3 8 6 i n c l u d e s a m e n u driven method editor for LC, GC, HPLC, SEC, GC/MS, and G C / F T IR. The editor changes and updates method files, displays c a l i b r a t i o n curves a n d t i m e d e v e n t s , and r e moves bad calibration samples with a mouse click. Grams/386 r u n s un der Windows v3.0 or higher on 386 and 486 PCs and requires a math co processor and VGA display. Galactic 413 C h e m o m e t r i c s . Unscrambler II v5 performs m u l t i v a r i a t e calibration a n d p r e d i c t i o n u s i n g PCA, PCR, PLS, and neural net methods; exper imental design screening and optimi zation; validation by leverage correc tion, test set, and cross-validation methods; outlier detection, weight ing, and scaling; and classification modeling u s i n g SIMCA. G r a p h i n g capabilities include preset plots as well as 1-, 2-, and 3-vector plots; his tograms; matrix, map, contour, cu mulative distribution, and sample plots; overlay, scaling, and rotation;
Residual gas analyzers Series PPT are designed for use in surface stud ies, thermal analysis, and polymer re search. The analyzers have mass ranges to 200 Da and contain Faraday and electron multiplier detectors, 16channel multiplexing capability, and PC-based software. The units mount on a quadrupole sensor flange and can be interfaced directly with PCs. MKS Instruments 414 and display of regression lines and statistics. Context-sensitive on-line help, tutorials with test data, and a macro system for customized plots and automated calibrations are in cluded. Camo 415
Manufacturers' Literature TLC. "Camag Bibliography Service No. 70" p r e s e n t s 215 a b s t r a c t s of books, articles, and reviews for TLC methods and applications. Topics in clude automation and quantitation, hyphenated techniques, t h i n - l a y e r electrophoresis, and other methods as well as TLC determination of pro teins, heterocyclic nitrogen-contain ing c o m p o u n d s , o r g a n o m e t a l l i c s , antibiotics, dyes, pesticides, pharma ceuticals, inorganics, s u r f a c t a n t s , and plastics and their intermediates. Application pages featuring standard glass, horizontal, and automated plate development chambers; preci sion spray applicators; and a work station with a plate scanner are in cluded. 60 pp. Camag 416 MS. Application note describes the HP 5972A mass-selective detector (MSD) and compares it with common GC, flame ionization, and electron capture detectors. The note discusses the theory of operation in scan and SIM m o d e s a n d p r e s e n t s s a m p l e chromatograms and schematics. 12 pp. Hewlett Packard 417
ANALYTICAL CHEMISTRY, VOL. 65, NO. 15, AUGUST 1, 1993 · 697 A
