GC/MS WHAT'S IMPORTANT TO YOU?

D Sub-Nanogram Scanning Sensitivity Π Fast Switchover CI/EI D 500 AMU Scan in 1/2 Sec. Π Microprocessor Control D Dual User Data System Π Computerized Selected Ion Monitoring Π High Dynamic Resolution D Easy Operation D Low Cost

THE ALL-NEW ΑΕΙ MS-25 HAS IT ALL! Designed from the ground up as an integrated

GC/MS/DS system, this high performance package offers the absolute latest in all three technologies. And performance shows it! If there's a new GC/MS in your future, you owe it to yourself to look into this state-of-the-art instrument. If your need is imminent, call Keith Compson, Product Manager in San Diego, California.

KRATOS, INC. ΑΕΙ Scientific Instruments 4075 Ruffin Road San Diego, CA 92123 Telephone (714) 565-7701

CIRCLE #118 FOR L I T E R A T U R E

KRATOS, LTD. ΑΕΙ Scientific Instruments Barton Dock Road, Urmston, Manchester England M31 2LD Telephone 061-865-4466

CI RCLE #119 FOR S A L E S M A N C A L L

Manufacturers' Literature

pH/mV Meter. Features new meter that measures pH from 0.00 to 14.00 with ±0.01 accuracy and absolute or rela­tive mV from -1999 to +1999 mV with ±1-mV accuracy. 2 pp. Pope Scientif­ic, Inc. 437

Hydrogen Generator, Describes the Model 8812-150 designed to provide a safe, reliable, ultrapure hydrogen sup­ply for gas chromatographs and general laboratory equipment. The unit meets OSHA and ASME requirements. 4 pp. Bendix Corp. 438

Catalogs Mass Spectrometers. Features the en­tire line of GC/MS systems, mass spec­trometers, and related data systems. Varian MAT GmbH, Dept. HSW 4, P.O. Box 14 40 62, D-2800 Bremen 10, Fed­eral Republic of Germany 447

Glassware. Laboratory glassware for clinical and research laboratories in the health care field is featured, as well as standard and custom-made plastic ware. Demuth Glass Div., Brockway Glass Co., Inc. 454

Biochemicals. Contains a complete listing of biochemicals available with comprehensive sections on amino acids, peptides, and enzymes. 140 pp. Research Plus Laboratories, Inc. 449

Research Chemicals. Includes active compounds, with special emphasis on organofluorine and organosilicon com­pounds, derivatizing reagents, and mass markers and other compounds with specific applications. Also includes items available at special bargain prices. 96 pp. PCR Research Chemi­cals, Inc. 451

Cells. Lists full line available including the standard rectangular cells, cylindri­cal cells, semimicro and micro cells, stoppered cells, flow-through cells, constant temperature cells, and tandem cells. 7 pp. Hellma Cells, Inc. 460

Infrared Accessories. Lists many new and improved items including transmis­sion accessories, micro sampling ac­cessories, reflectance accessories, py-rolysis equipment, laboratory recorders, and infrared transmitting crystals and windows. 36 pp. Wilks Scientific Corp.

464

For more information on listed items, circle the appropriate numbers on one of our Readers' Service Cards

1052 A · ANALYTICAL CHEMISTRY, VOL. 49, NO. 12, OCTOBER 1977