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ment, P.O. Box Η, Ε. Brunswick, N.J. 08816. 201-249-1400. All courses will be conducted at The Center for Pro­fessional Advancement's Academic Center, Sheraton Motor Inn, Route 18, E. Brunswick, N.J.

Applied Regression Analysis Jan. 28-31. Dr. Edward Wolf. $620

Aerosol Techno logy March 17-19. Dr. Simon Welch. $490

For Virginia Polytechnic Inst, and State University workshops listed below, contact: Linda Leffel, CEC, Virginia Tech, Blacksburg, Va. 24061. 703-961-5241. Instructors for the three courses will be Jonathan A. Titus, Paul Field, Christopher Titus, and David G. Larsen. Courses will be held at the University.

Digital Electronics for Instrumen­tation and Automation

March 10-11. $225

8080-8085-Z80 Microcomputer In­terfacing, Design and Software

March 12-14. $350

TRS-80 Interfacing and Pro­gramming for Instrumentation and Control

March 17-18. $225

Source Sampling for Particulate Pollutants

Research Triangle Park, N.C. May 5-9. Dr. Jim Jahnke. $157.50. Contact: Sheila Honeycutt, Air Pollution Training Insti tute, MD20, Environ­mental Research Center, Research Triangle Park, N.C. 27711. 919-541-2498

For Your Information

Cahn Instruments, a Division of Thiokol Corp., has been acquired by a group of managers and investors, headed up by company president, Jerry Yablonka. Mr. Yablonka will continue as president of the new com­pany, known now as Cahn Instru­ments, Inc. Cahn manufactures preci­sion balances.

Hitachi, Ltd. has announced tha t Hi­tachi electron microscopes will no longer be sold in the U.S. through the Perkin-Elmer Corp. Instead, the com­pany has formed a direct marketing operation: Hitachi Scientific Instru­ments Division. The main office is the same as the former Hitachi/Per-kin-Elmer: 411 Clyde Ave., Mountain View, Calif. 94043, 415-961-0461.

Centcom, Ltd., A N A L Y T I C A L C H E M ­I S T R Y ' S advertising management, has announced the availability of "The Scientific Market for Gas Chroma­tography." The study upon which it is based was conducted in an effort to determine the types of GC instru­ments to be purchased in the next year, the type and extent of ancillary equipment needed, the field and type of work engaged in by scientists plan­ning to buy instruments, primary use to which new instruments will be put, and calibration and carrier gases cur­rently used. The study is available for $500 from Centcom, Ltd., 25 Sylvan Road South, Westport, Conn. 06880, 203-226-7131.

NEW! 'Baker Instra-Analyzed' Acids for Trace Metal Analysis

Produced by J. T. Baker, these reagents are quality controlled to provide low analytical blank values for more than 25 trace elements... low enough to make them suitable for most multi-element trace metals analysis via emis­sion spectroscopy, atomic absorption and ICP. Examine the label.

7 lb(3.2 kg)

Nitric Acid 'Baker Instra-Analyzed'

Trace Metal Analysis

BAKER ANALYZED' Reagent

3-9598 • ,ow blank values

for over 25 key trace elements

Ο Actual lot analysis on the label . . . proof of purity

Π Convenient pack­aging . . . in 1 pint and 5 pint flint glass bottles

Products Available Baker Instra-Analyzed Acids

Product No.

Case Size

Price/ Bottle

Case Size

Price/ Bottle

Acetic Acid 9524 Hydrochloric Acid 9530 Nitric Acid 9598 Sulfuric Acid 9673 Also—Ammonium Hydroxide 9733

12x1 pt. 12x1 pt. 12x1 pt. 12x1 pt. 12x1 pt.

i 7.50 8.00

10.00 8.14 6.00

4x5 lb. 6x6 lb. 6x7 lb. 6x9 ib. 4x8 pt.

$17.75 15.00 17.50 18.00 39.20

If your work requires even lower impurity levels, we recommend our ULTREX® acids . . . the standard for reagent purity throughout the world.

J.T. Baker Chemical Co. Laboratory Products Phillipsburg, NJ 08865 (201) 859-2151

J.T.Baker

CHEMICALS

CIRCLE 26 ON READER SERVICE CARD

60 A · ANALYTICAL CHEMISTRY. VOL. 52, NO. 1, JANUARY 1980