NEW FROM AVCO -DROP-IN
DYE CASSETTES . . .
NOW SELECT YOUR TUNABLE LASER SPECIFICATIONS AVCO now makes possible several options in tunable laser speci fications resulting from the introduction of "drop-in" dye cassettes. You can now select a tunable laser system meeting your requirements for repetition rates and average power. The new flowing dye cassettes or static dye cells can be combined with either of AVCO's N 2 lasers to give tunable laser specifica tions as shown below.
TUNABLE LASER SPECIFICATIONS MODEL C950 IM2 LASER
MODEL C5000 N2 LASER ^ «
REP. RATE
STATIC DYE CELLS
FLOWING DYE CASSETTES
1-25 pps
1-100 pps
to 2.5 mW
to 10 mW
A V G
POWER TUNABLE RANGE REP. RATE
360 to 670 η m
360 to 670 nm
1-25 pps
5-500 pps
to 2.5 mW
to 50 mW
A V G
POWER TUNABLE RANGE
360 to 670 nm
360 to 670 nm
For information on A V C O lasers, circle read ers' service number or write or phone Dick Neal at Avco Everett Research Laboratories.
AVCO LASERS EVERETT R E S E A R C H
LABORATORY
HLIfciti MÊVbMEr U t A C H P A P K W A Y • EVERETT. M A S S A C H U S E T T S O P 1 4 3 TELEPHONE: 617 3 S S - 3 0 0 0 CIRCLE 90 ON READER SERVICE CARD
SPECTROCHEMICAL STANDARDS Write Alpha Metals, Inc., Analytical Division tor a complete catalogue.
ALPHA METALS, INC.
ANALYTICAL DIVISION 56 Water Street, Jersey City, New Jersey 07304 · Call (201) 434-6778
CIRCLE 1 ON READER SERVICE CARD 116 A
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spectroscopic, spectrophotometric, chro matographic, ion exchange, polarographic, and azeotropic distillation tech niques. The Determination of Impurities in Nu clear Grade Sodium Metal. Louis Silverman, ix + 143 pages. Pergamon Press, Inc., Maxwell House, Fairview Park, Elmsford, N.Y. 10523. 1971. $10
This monograph presents procedures for the determination of 24 elements in sodium metal. In each of the 24 sec tions, a description of the impurity metal's possible molecular forms, the analytical range, a synopsis of the method(s), the sample size, interfer ences, reagents, preparation of the sam ple, and a "cookbook" procedure are given. There, however, is also a discus sion section in which possible problems in each analysis and their solutions, as well as a general discussion of the method(s), are presented. Each sec tion also gives a selected list of refer ences. Although the book is concerned primarily with the determination of these impurities in sodium metal, the procedures are listed as being applicable (with modifications) to about 5 or 6 so dium salts, the elements in sea water, and to many potassium and ammonium salts. Methods of Biochemical Analysis, Vol 20. David Glick, Ed. viii + 393 pages. John Wiley & Sons, Inc., 605 Third Ave., New York, N.Y. 10016. 1971. $17.50
solder tin alloys lead alloys
More than 60 standards available with compositions designed to encompass Federal Specification QQ-S-571 and ASTM Designation: Β 32.
New Books
ANALYTICAL CHEMISTRY, VOL. 4 4 , NO. 2 , FEBRUARY 1 9 7 2
This volume is the 20th annual re view on the subject of biochemical anal ysis. This particular series tries to deal both with well-established methods and techniques which have undergone suffi cient improvement to merit reappraisal and with essentially new approaches which bear promise of great usefulness. The subjects covered in this book are: analysis of cyclic 3',5'-adenosine mono phosphate and cyclic 3',5'-guanosine monophosphate; the use of ethidium bromide for separation and determina tion of nucleic acids of various confor mational forms and measurement of their associated enzymes; the determi nation of phytate and inositol phos phates; the determination of glutamic and aspartic acids and their amides; methods for measurement of hydrogen isotope exchange in globular proteins; and a practical guide to the tempera ture-jump method for measuring the rate of fast reactions. There are also cumulative author and cumulative sub ject indexes (Volumes 1-20).
