MANUFACTURERS' LITERATURE
other laboratory supplies. Fisher Scientific Co., 711 Forbes Ave., Pitts burgh 19, Pa.
THIS BACTRONIC
Spectrovision. No. 10 issue gives a spectrophotometric method for esti mating blood oxygen using the TJnicam SP. 600 and describes a high tempera ture cell and an evacuable cell for the SP. 100 Spectrophotometer. Also in cluded is a bibliography of spectro photometric analysis in the plastics in dustry. Unicam Instruments Ltd., York St., Cambridge, England.
COLONY COUNTER MARKS AND COUNTS ELECTRONICALLY F o u r precision devices can b e used u n d e r brilliant i l l u m i n a t i o n t o r e c o r d a n d c o u n t colonies s i m u l t a n e o u s l y in o p e n a n d closed p l a t e s . F a s t , a c c u r a t e c o u n t s are m a d e with either the Electronic M a r k i n g Probe, P l u g - i n M a r k i n g P e n or G r e a s e P e n c i l , or t h e F i x e d Pushbutton Counter.
F & M for Scientific Research. Vol. 3, No. 2. This 12-page edition features an article, "The Science of Programmed Temperature Gas Chromatography" by Dr. J. C. Giddings. The Model 720 Dual Column Programmed Tempera ture Gas Chromatograph, Daystrom Atten-U-Matic Electronic Integrator, and the Model 270 Component Selector, all of interest to chromatographers, are described. F & M Scientific Corp., Route 41 and Starr Rd, Avondale, Pa.
P i n p o i n t colonies a r e easily d i s c e r n e d , r e c o r d e d , a n d m a r k e d in a single p r o b i n g a c t i o n t h a t l e a v e s a n i d e n t i fying p u n c t u r e in t h e a g a r . If p u n c t u r i n g is u n d e s i r able, the Electric Grease Pencil or M a r k i n g P e n m a y b e u s e d o n b a c k of glass or p l a s t i c p l a t e s . I n s t r u m e n t h a s a u t o m a t i c n u m e r i c a l r e s e t , sterilizing P r o b e W e l l , p l u s a m a g n i f y i n g v i e w e r . I t is unconditionally war ranted for o n e y e a r .
WRITE FOR C A T A L O G C110A/122
NBS Chemist-Analyst. Vol. 51, No. 3-4. The October issue contains a review of hydroquinone as a reductimetric reagent and several photometric, potentiometric titration, amperometric titration procedures. The lab sugges tions section includes an article on "Ex pedients for Application and Drying of Spots & Sheets in Paper Chroma tography." J. T. Baker Chemical Co., Phillipsburg, N. J.
Manufacturers
Aminco Laboratory News. Vol. 18, No. 1. This 12-page issue includes in formation on the Britton Chance Dual Wavelength Spectrophotometer, freezedrying instruments, Menisco-matic Buret, Pyrolyzer, freezing-point de pression apparatus, and a discussion and illustrations on thermogravimetric and differential thermal analysis. American Instrument Co., Inc., 8030 Georgia Ave., Silver Spring, Md.
and Distributors
of Precision Laboratory
Apparatus
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M I C ^ T H I N LAYER CHROMATOGRAPHY ADSORBENT MYRism ALCOHOL
ADSORBENT:
USE Amber-Hi-Lites. Sept. issue. No. 71 discusses the use of ion exchange resins in analytical chemistry. This article is particularly concerned with trace analyses. Included are techniques for the removal and concentration of cationic or anionic impurities from water; a procedure for the separation of nickel, manganese, cobalt, iron and zinc from one another; the analytical separation of aldehydes and ketones from each other and from alcohols. Rohm & Haas Co., Resins Dept., Ion Exchange, Philadelphia 5, Pa.
New Brunswick Scientific Co., Inc. 1130 S o m e r s e t St.,New B r u n s w i c k , N.J.
ANASIL S SOLVENT SYSTEM: SKELLYSOLVE Β — 90 PARTS ETHYL ETHER — 10 PARTS ACETIC ACID — 1 PART DEVELOPING TIME: 20 MINUTES-
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CHOLESTEROL
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More Analyses Per Day * Developing time using conventional TLC silica gels: 40 minutes A N A S I L is a new and completely different T L C adsorbent t h a t provides b o t h rapid analysis and excellent resolution. It has been found superior to commonly-used silica gel preparations for m a n y applications. See chart above. AVAILABLE WITH AND WITHOUT BINDER A N A S I L is furnished in two forms, both containing S1O2 : ANASIL Β contains CaSU4 binder. It is an excellent general-purpose a d s o r b e n t for consistently p r o v i d i n g repro ducible T L C plates. ANASIL S contains n o binder. It is ideally suited for the analysis of lipid classes — including p h o s p h o l i p i d s and other complexes where the presence of b i n d e r
interferes with n o r m a l m i g r a t i o n of individ ual components. Both Anasil Β and Anasil S yield t h i n , a d h e r e n t , h o m o g e n e o u s films. PRICE: Only $12 per 1 \/2 lb. bottle of either Anasil Β or S. Quantity discounts on four bottles and up. Immediate delivery from stock. JUST OFF THE PRESS.' NEW CATALOG on today's most complete line of gas chroma tography accessories and supplies—including 58 new specially-synthesized polar phases for advanced GC research. Write for your free copy today.
ANALABS ANALYTICAL ENGINEERING LABORATORIES, INC. P.O. Box 5215, Hamden 18, Conn., ATwater 8-3400
Circle No. 119 on Readers' Service Card
VOL. 34, NO. 13, DECEMBER 1962
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