BLEND YOUR OWN GAS STANDARDS with the Astro DIGITAL STATIC GAS BLENDER
NEW
PRODUCTS
BENEFITS: • Rapid, cost effective preparation of precise gas standards. • Produces primary standard blends not requiring analysis. • ± 1 % accuracy relative to component addition. • Up to 23 blends to exact concentrations— not target values. • Automatic, unattended computer controlled operation. • Simple to operate and maintain. Does not require highly skilled operator. • Blending time from 15-60 minutes. • Liquid injection port available.
Model 810A concentrating system for capillary GC can perform both purge-and-trap water analysis and thermal desorption of air-monitoring and head space sampling tubes. A sequential trapping system eliminates the need for cryo-focusing. Envirochem 403
for low light-level applications, includes an imaging photomultiplier sensor, thermoelectric cooler, high-performance amplifiers, position-analyzing electronic system, HV bias supply, incrementing RAM buffer memory, software, and complete PC-based data collection and display systems. Surface Science 420 SEM. Model 1830 scanning electron microscope features digital image storage and processing; room light operation; automatic image focusing, stigmation, and contrast; a six-inch eucentric stage; a 45° conical final lens; and a large sample chamber. Amray 423
• Automatic eight point serial dilutions of "Mother Standard."
Goniometer. Automatic goniometer attachment for Portaspec X-ray spec-
• Fail-safe operation —22 safety checks monitored continuously by computer.
TrAAcs 800 random access chemistry system can automatically initiate operation, sequence reagents, set base line and gain, and generate real-time as well as corrected results. Up to 120 sample cups can be accommodated in both the fourchannel and two-channel versions. Technicon 404
• Safe for corrosive, toxic or flammable gas blends. • Unique design reduces loss and waste of gases during blending. • Installations world-wide.
ASTRO
ASTRO ANALYTICAL 100 Park Avenue League City, TX 77573 713/332-2484 CIRCLE 8 ON READER SERVICE CARD
See us at PitCon Booth #649. 280 A · ANALYTICAL CHEMISTRY, VOL. 59, NO. 3, FEBRUARY 1, 1987
trographs offers computer-controlled analysis, including a high-precision angle setting, an automatic peak search program, an automatic spectrum scanning with 30 different scanning speeds, and a digital display of two-theta angles. Cianflone Scientific 422 X-ray spectrometer. WDX-3PC wavelength dispersive X-ray spectrometer system features database storage of operating parameters, KLM spectral identification, and ZAF matrix correction. Crystal selection, two-theta position, and slit width and position are controlled through an IBM PC. Baseline, window, amplifier gain, and detector bias are automatically adjusted during spectral scanning. Microspec 424
