from the

---

LABORATORY INTERFACE IERIPHERALUUBSYSTEM AUTOMATE SPECS, GCS, GEL SCANNERS for less than $2000 including computer and disk drive

Briefs Hollow Fiber Postcolumn Reactor for Liquid Chromatography

768

James C. Davis* and Dennis P. Peterson, Dow Chemical USA, Midland, Mich. 48640 Anal. Chem. ,57 (1985) Adding Forward Searching Capabilities to a Reverse Search Algorithm for Unknown Mass Spectra 771 Douglas B. Stauffer and Fred W. McLafferty*, Chemistry Department, Cornell University, Ithaca, N.Y. 14853, and Robert D. Ellis and David W. Peterson, Scientific Instrument Division, Hewlett-Packard, 1501 California Avenue, Palo Alto, Calif. 94304 Anal. Chem., 57 (1985)

C H R O M A T O G R A P H Y SOFTWARE Auto or manual peak detection and integration. Store and retrieve scan on floppy. 16 BIT ADCs — Four independent channels of 16 bit ADCs giving 1 part in 65000 resolution throughout ADC span. (Other mfgrs. use 12 bit ADCs resolving to only 1 part in 4096.) Differential in­ puts with dedicated integrator for each channel for optimum noise rejection. Full-scale sensitivities of 10 mv to 10 volts available. D I G I T A L I/O — 24 lines of digital input/output included. DAC CHANNELS — Optional analog output with full-scale volt­ ages of 1 to 15 volts for controlling devices or data output. Γν^ι β ^ β HIGH R E S O L U T I O N - V E R S A T I L E ( Ύ Χ ^ ^ Β COMPLETE — 4 channels of ADC with digital ^ • Y N l ( ( i e i ) I I/O and chromatography software for only r^^WÈÊÊÊÊ $1185.

Trace Element Determination in Flames by Laser Enhanced Ionization Spectrometry 773 Ove Axner, Ingvar Lindgren, Ingemar Magnusson, and Halina Rubinsztein-Dunlop*, Department of Physics, Chalmers University of Technology/University of Gothenburg, S-412 96 Gôteborg, Sweden Anal. Chem., 57 (1985) Differentiation of Cationic from Neutral TransitionMetal Complexes Using Wires as Field Desorption Emitters 776 Steve E. Unger, The Squibb Institute for Medical Research, P.O. Box 4000, Princeton, N.J. 08540 Anal. Chem., 57 (1985)

205 Weaver Street / Carrboro, N.C. 27510 (919) 929-5001 for more information

SPECTROFUGE C O R P O R A T I O N OF N O R T H C A R O L I N A , INC.

CIRCLE 196 ON READER SERVICE CARD

MttSMHK

mwÊmmmmmimmUROPORPHYRINS

GLYPHOSATE

Circle No. 112

Circle No. 113

Aids for Analytical Chemists Modified Interface for Pyrolysis Gas Chromatography with Capillary Columns 778 Robert S. Whiton and Stephen L. Morgan*, Department of Chemistry, University of South Carolina, Columbia, S.C. 29208 Anal. Chem., 57 (1985) Anion Contamination of Environmental Water Samples Introduced by Filter Media 780 P. C. Jay, Environmental Research Branch, Atomic Energy of Canada Limited, Chalk River Nuclear Laboratories, Chalk River, Ontario, Canada K0J1J0 Anal Chem., 57 (1985) Corrosion Resistant Coating for Laboratory Equipment 782

AMINOGLYCOSIDES (GENTAMYCIN)

PEPTIDES Circle No. 115

Larry P. Morgenthaler* and Armand F. Lange, Jr., Quality Assurance Laboratory, University of Nevada at Las Vegas, 4505 Maryland Parkway, Las Vegas, Nev. 89154 Anal. Chem. ,57 (1985)

Circle No. 114

Γννο-Phase Titration of Poly(oxyethylene) Nonionic Surf actants with Tetrakis(4-f luorophenyl )borate 783 natlnr Write·

KRATOS A N A L Y T I C A L a division of SPECTROS 170 WHHttfm Drive · Ramsey, N«I. 07446 Telephone: 201/934*9000 · Telex: 6853505

380 A · ANALYTICAL CHEMISTRY. VOL. 57. NO. 3. MARCH 1985

Masahiro Tsubouchi*, Nakamichi Yamasaki, and Kazumichi Yanagisawa, Laboratory of Chemistry, Kochi Medical School, Nankoku, Kochi 781-51, Japan Anal. Chem., 57 (1985)