NEW PRODUCTS
sample sizes ranging from 2 uL to 5 mL and diluent volumes from 50 uL to 25 mL. Applications include se rial dilutions, sample transfer and wash, and reagent dispensing. Manostat Corp. 209 S p e c t r o m e t e r . JY 50S GDS glow discharge spectrometers are de signed for elemental, surface, and depth profiling analysis of solids. Conductive and nonconductive mate rials can be analyzed in thicknesses ranging from a few nanometers to micrometers. JY Emission Division, Instruments SA 210 Model 3140 electropherograph is a capillary electrophoresis system that includes a 40-position autosampler, 30-kV reversible-polarity power supply, and softwareselectable vacuum and electromigration sample injection. Isco 204
Instrumentation S a m p l e r . Model AS-100T is a biocom patible automatic sampler for HPLC applications. The system, which allows unattended injections of up to 100 in dividual s a m p l e s , features solidstate p r o g r a m m a b l e refrigeration and random access programming. Bio-Rad Laboratories 201 Densitometer. Model 300B comput ing densitometer includes a 16-MHz Intel 80386SX microprocessor t h a t drives the high-performance optical scanning system and automatically stores complete images of the scan area on the integral hard disk. Mo lecular Dynamics 202 T e n s i o m e t e r . Lauda tensiometer Model TE 1C, which automates pro cedures such as critical micelle con centration measurements, automati cally m e a s u r e s a n d r e c o r d s t h e surface tension of liquids and the in terfacial tension between liquids as a function of time. Brinkmann Instru ments 203 ICP. Liberty series ICP spectrome ters feature a 100 χ 90 mm high-res olution holographic grating, doublepass S t u r m a n - M a s t e r s spray chamber, PC-controlled multitasking
software, and the capability for unat tended analysis of up to 500 solu tions. Varian 205 P h o t o d e t e c t o r . C4258 picosecond photodetector features an operating range of 450-870 nm and a rise time of 40 ps. The large-area photodiode and associated high-frequency cir cuit and power source are housed in a single case. H a m a m a t s u Photonic Systems 206 P a r t i c l e s i z e . Microtrac ultrafine particle analyzer measures the size distribution of particles in concen trated samples with little or no dilu tion. Doppler-shifted laser light, backscattered from particles, is com pared with a reference beam inter nally reflected at t h e s a m p l e waveguide interface. Leeds & Northrup 207 Colorimeter. Model A-2C process density colorimeter is designed to continuously monitor the density of selected colors in fluids flowing through tubing or pipes. The system consists of a light source, filters, flow cell, photoelectric scanner, and indi cator/controller unit. McNab 208
C h r o m a t o g r a p h y . GPC system consists of an isocratic pump, RI de tector, manual injector, column oven, 2-L polyethylene bottle kit, and the PLgell mixed bed column and gel guard column. Applications include quality control of plastics, resins, and polymer formulations or blends. Perkin Elmer 211 LC. PHRED photochemical reactor for enhanced detection performs on line postcolumn continuous photolytic derivatization. Placed between the HPLC column and detector, the unit consists of a lamp holder, 254-nm low-pressure mercury lamp, and a holder for the knitted reactor coils. Aura Industries 212
Software Data analysis. S-PLUS is an inter active computing environment that includes both a full-featured graphi cal data analysis system and a quan titative programming language. Fea t u r e s include p u b l i c a t i o n - q u a l i t y graphical output, exploratory data analysis, and statistical methods. Statistical Sciences 213 Molecular modeling. Chem3D Plus version 3.0 allows users to build or Companies interested in a listing in this department should send their releases directly to ANALYTICAL CHEMISTRY, Attn:
Liquid handling. Compudil dilutor is a microprocessor-controlled syr inge-style unit that accommodates
New Products, 1155 16th Street, N.W., Washington, DC 20036.
ANALYTICAL CHEMISTRY, VOL. 63, NO. 10, MAY 15, 1991 · 589 A
