LABORATORY MATERIALS July or December—EASTERN
reagents are always
on tap!
Inulin, depolymerized · Inulin, alkali-stable Polyfructosan · D-Mandelic Acid · L-Carnosine Dihydroxymaleic Acid · Quinolinic Anhydride 4-tert.-Butylcyclohexanol-1 · η-Butyl Gallate Pinacol * Pinacolone · Benzoic Anhydride Fluorenone * Diphenylurea * Rhodanine
SUPPLY CENTER BLAK-RAY FLUORESCENCE ANALYSIS Complete your laboratory with U l t r a - V i o l e t Products' long or short-wave lamps and f i x t u r e s . Designed to the most exacting needs' of any laboratory. PLUS Chromato-Vue for fluorescent Chromatographic Analysis! • Sl-2437 Short and SL-3600 Long Wave W r i t e Dept. A C - 7 N.U/) ULTRA-VIOLET PRODUCTS, INC.j SAN GABRIEL, CALIFORNIA
W r i t e for list K - 6 2 of other organic chemicals.
EASTERN CHEMICAL CORPORATION
34-K SPRING STREET N E W A R K 4, N. J.
LIGHT SOURCES
25*tyouTUed:
Cellex Cellulose Ion Exchangers? (For fractionation of proteins, nucleic acids, and enzymes) ASK FOR PRICE LIST ACX
SPECIAL
EQUIPMENT
BIO-ROD ^4&onato>iie&— 32nd & GRIFFIN AVE. · RICHMOND, CALIFORNIA
ELECTRIC
1919—1962 LaMotte Chemical Chestertown, Maryland U.S.A.
by GATES • Mercury Point Sources • Raymaster Blacklighl (long and short wave ultraviolet) • Sodium Vapor • Mercury Vapor • Zirconium Concentrated Arc Lamps • Imported Special Lamps • Photochemical or High Intensity "Uviarcs" • Auxiliary Operating Equipment for Above W r i t P ' o r FREE Catalog or Contact I w l l l C your Laboratory Supply Dealer
Specialists in Colorimetric Techniques Reagents—Standards—Comparators Send for illustrated Controls Catalog Dept. A C
Box 2 1 6 , F r a n k l i n S q u a r e ,
Best for F l u o r i d e
AMADAC-P™ Convenience-packaged mixture of l a n t h a n u m chelate of 3-aminomethy!alizarin-NN-diacetic a c i d , buffers and stabilizers, affords accurate, sensitive and convenient quantitative colori metric method for fluoride. 50 0- (for 100 detns.), w i t h bibliography and complete instructions $15
DIRECTORY GRA-LAB INTERVAL TIMERS A u t o m a t i c signalling a n d switching. Various models, each w i t h 3600 possi ble settings. G R A - L A B M I C R O T I M E R S 1/lOsec. or 1/1000 min. s t o p clocks. R e m o t e s t a r t s t o p control. W r i t e for catalog.
DIMCO-GRAY
BURDICK & JACKSON LABORATORIES
COMPANY DAYTON 2, OHIO
2 1 0 E. SIXTH ST.,
1953 S. HARVEY ST., MUSKEGON, MICHIGAN
BUY LABORATORY
YOUR ANNOUNCEMENT of Equip ment or Chemicals for Sale and/or Wanted, and Professional Services, can carry YOUR MESSAGE to the readers of the leading work-maga zine for instrumentation, control and analysis. Rates
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ANALYTICAL CHEMISTRY Advertising Office: 430 Park Avenue New York 22, Ν. Ύ.
124 A
·
ANALYTICAL CHEMISTRY
L.I..N.Y.
PORCELAIN
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1 12 24 48
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SERVICES QUANTITATIVE Organic Microanalyses WEST COAST ANALYTICAL LABORATORIES, INC. Box 5 0 5 , El Cerrito, California
LA 4 - 0 2 9 8
CLARK MICROANALYTICAL LABORATORY C H , N , S, Halogen, Fluorine, Oxygen, A l k o x y l , Alkimide, A c e t y l , Terminal, M e t h y l , etc. by specialists in organic microchemical analysis. H o w a r d S. Clark, Director P.'jO. Box 17, Urbana, III.—-Telephone EMpirc 7-8406
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MASS SPECTROMETER SERVICE PETROLEUM A N A L Y T I C A L RESEARCH CORP. Houston 17, Texas Tel. Mission 9-2753
P. O. Box 12334
NATIONAL SPECTROGRAPHS LABORATORIES. INC.
Reseat H?J Ι ί ο ρ β ί l u a l i l I Control COM! KBGBTGI# m JLITIES uc • Anal rBgieneTS ^Hriikateria m Physics • Indii §He| • Met! lirS I CMtmi H * β liculture 8300 Euci IAVI IcievmoJ Phis! mm 1-4B64 11(0 PalnPive.,'WaleiSFfifidi f Hub 5-1691 A M I N O ACID ANALYSIS . . . of proteins, peptides, tissue extracts, foods, and physiological fluids by the Spackman, Moore, Stein ion-exchange method, using the latest BeckmanSpinco Analyzer. Inquiries for rates and other details are invited
