MAY 1954 ANALYTICAL CHEMISTRY
R e a d e r s ' Information Service These handy cards will bring information of value to chemists, engineers, and other technologists in laboratory, pilot plant, and production Circle d e s i r e d i t e m s :
For further information about items mentioned on the advertising pages or listed
under NEW PRODUCTS and MANUFACTURERS' LITERATURE, circle the corresponding key number on the adjoining tear-out cards and mail. pages and to the index below.
ADVERTISED PRODUCTS INDEX numbers are keyed to the ad
Numbers refer to the page on which an ad appears.
Numbers f o l l o w
ing the letter A refer to specific items on pages where more than one ad and/or product is indexed. Where these latter numbers are used, consult the ad and INDEX to determine the keyed item.
ADVERTISED PRODUCTS INDEX EQUIPMENT AND INSTRUMENTS Absorption Cells, Glass Balances, Analytical Balances, Solution Balances, Triple Beam
57 A 3rd Cover 15 A-2 40 A
Chromatography Apparatus . . . . Colorimeters
Combustion Boats and Tubes . . . Constant Temperature Baths . . . Densitometers
Filters, Porcelain Vacuum Filters, Sintered Glass Fluorimeters
NEW PRODUCTS
56 A - l 13 A - l 31 A 44 A - l 55 A-2 58 A 30 A-3 32 A 37 A - l 52 A-4 53 A - l 19 A - l 30 A-2 58 A
. . . . . . . .
38 A - l 50 A - l 58 A A A A-3 A-2 A-l
MANUFACTURERS' LITERATURE
2 10 18 21 2 9
37 45
3 11 19 22 3 0
4 12
5 13
6 14
7 15
8 16
23
24 38 40
25 33 41
26 34 42
27 35 43
31
38 46
39
ADVERTISED PRODUCTS 4A 5A 6 A 7 A 8 A 9 A 10 A 11 A 12 A 13 A - 1 13 A - 2
Funnels, Buchner Glassware
12 A
Company
Heating Tapes Hoods Hot Plates Hydrogen Analyzer
47 47 52 10
Address -
Kjeldahl Apparatus
22 A
Laboratory Furniture
8A 13 A-2
Manometers Melting Point Apparatus Metallurgical Apparatus Microphotometers, Light-Scattering Microphotometers, Photomultiplier Microscopes, Electron Microscopes, Polarizing
5A 26 A 17 A 50 A-4 50 A-5 56 A-3 51 A - l
Ovens Ovens, Drying pH Meters
28 A 38 A-2 16 A 30 A-l 20 A 37 A-3
A-2 A-l A-2 A
20 2 8
36 44
46 45 30 37 55
Phototubes, Multiplier Platinumware
1 9 17
53 A-2
Calorimeters Cathetometers Centrifuges
Electroanalysis Apparatus Electrophoresis Apparatus
READERS' INFORMATION CARD—ANALYTICAL CHEMISTRY MAY 1954—Valid through October 1954
14A-1 14A-2 14 A - 3 14 A - 4 15 A - 1 15 A - 2 16 A 17 A 18 A 19 A - 1 19 A - 2
20 A 22 A 23 A 24 A 25 A - 1 25 A - 2 26 A 28 A 30A-1 30 A - 2 30 A - 3
31 A 32 A 34 A 35 A 36 A 37 A - 1 37 A - 2 37 A - 3 37 A - 4 38 A - 1 38 A - 2
39A-1 39 A - 2 40 A 43 A 44 A - 1 44 A - 2 44 A - 3 45 A 46 A 47 A - 1 47 A - 2
49 A - 1 49 A - 2 50 A - 1 50 A - 2 50 A - 3 50 A - 4 50 A - 5 51 A - 1 51 A - 2 52 A - 1 52 A - 2
52 A - 3 52 A - 4 53 A - 1 53 A - 2 55 A - 1 55 A - 2 55 A - 3 56 A - 1 56A-2 56 A - 3 57 A
58 A 2nd Cover 3rd Cover 4th Cover
Name — FIRST CLASS PERMIT N O . 1538 (Sec. 3 4 . 9 , P.L.&R.) NEW YORK, Ν . Υ.
Position -
BUSINESS REPLY CARD NO POSTAGE STAMP NECESSARY IF MAILED IN THE UNITED STATES
READERS' INFORMATION SERVICE Analytical Chemistry 330 W. 42nd St. New York 36, Ν. Υ.
READERS' I N F O R M A T I O N SERVICE Polyethylene W a r e
18 A 24 A 52A-3 S3 A-l 44 A-3 4A 50 A-3 44 A-2 15 A-l 49 A-2 14 A - l
.
Pumps . . . . . . . . . . . . . Refractory W a r e Rotators Semimicro Analysis Apparatus . . Shaker-Incubators Shakers Silicaware, Vitreous Sink Traps, Polyethylene . . . . Spectrometers, Infrared Spectrometers, Nuclear Magnetic Resonance Spectrophotometer Accessories . .
CHEMICALS A N D
2nd Cover 4th Cover Ammonium Hydroxide 2nd Cover Catalysts, P l a t i n u m M e t a l . . . . 37 A-4 Cellulose P o w d e r s 34 A Chelating Agents 55 A-3 Filter M e d i a , Sintered Glass . . . 45 A 39 A-l Filter P a p e r s Indicators for Nonaqueous Liquids. 25 A-2 6 A Laboratory Chemicals 43 A 51 A-2 37 A-3 Platinum 25 A-l Squalene Tetrabromophenolphthalein Ethyl 25 A-2 Ester
36 A
14 A-4 35 A 14 A-2
Spectrophotometers, Infrared . . . Spectrophotometers, Ratio Record ing Infrared T e m p e r a t u r e Controllers Tubing, R u b b e r Ultracentrifuges Viscometers Voltage R e g u l a t o r s
14 19 52 23 56 9 49 50 7
W a r b u r g Apparatus W a s h i n g M a c h i n e s , Glassware
NEW PRODUCTS
MATERIALS
Acids
A-3 A-2 A-l A A-2 A A-l A-2 A
Equipment · Apparatus · Instruments · Reagents · Materials for the Analyst Balance A balance with a capacity of 120 grams for weighing as low as 5 mg. has been announced b y T h e Torsion Bal ance Co. T h e m e t a l case of Model IL-9 has a hinged lid with a glass t o p and front for viewing the graduated beam and index.
MISCELLANEOUS Atom M o d e l s Filtration Chart
11 A 39 A-2
Name
FIRST CLASS PERMIT N O . 1538 (Sec. 34.9, P.L.&R.) NEW YORK, Ν. Υ.
Position Company Address
-
T h e 2 3 /4-inch high cover permits t h e balance t o function with a 100-gram weight on t h e p a n a n d t h e lid closed. B o t h beam arrest and 3 1 /2-inch diameter p a n s are m a d e of stainless steel. 1
BUSINESS REPLY CARD N O POSTAGE STAMP NECESSARY IF M A I L E D I N THE UNITED STATES
READERS' INFORMATIOM SERVICE Incubator
Analytical Chemistry 330 W. 42nd St. New York 3 6 , Ν. Υ.
READERS' I N F O R M A T I O N CARD— A N A L Y T I C A L CHEMISTRY MAY 1954 Valid through October 1954 NEW PRODUCTS
MANUFACTURERS' LITERATURE
1 9 17
2 10 18
3 11 19
4 12
5 13
6 14
7 15
8 16
20
21 29 37 45
22 30 38 46
23 31 39
24 32 40
25 33 41
26 34 42
27 35 43
28 36 44
ADVERTISED PRODUCTS 20 A 4A 14 A-1 5 A 14 A - 2 22 A 6A 14 A - 3 23 A 7A 14 A - 4 24 A 8 A 15 A - 1 25 A - 1 9A 15 A - 2 25 A - 2 16A 10 A 26 A 11 A 17 A 28 A 12 A 18 A 30 A - 1 13A-1 19 A - 1 30 A - 2 13 A - 2 19 A - 2 30 A - 3
31 32 34 35
A A A A
36A
37 37 37 37 38 38
A-1 A-2 A-3 A-4 A-1 A-2
39 39 40 43 44 44 44 45 46 47 47
A-1 A-2 A A A-1 A-2 A-3 A A A-1 A-2
49 A - 1 49 A - 2 50 A - 1 50 A - 2 50 A - 3 50 A - 4 50 A - 5 51 A-1 51 A - 2 52 A - 1 52 A - 2
52 52 53 53 55 55 55 56 56 56 57
A-3 A-4 A-1 A-2 A-1 A-2 A-3 A-1 A-2 A-3 A
58 A 2nd Cover 3rd Cover 4th Cover
A new model of t h e Precision-Freas B.O.D. incubator h a s been designed b y Precision Scientific Co. for close tem perature control a n d uniformity during low t e m p e r a t u r e incubations. T h e cabinet has a range of 5° t o 50° C. with a n accuracy of ± 0 . 5 ° C. Three shelves provide 8V2 square feet of work ing area and additional space is avail able on t w o shelves built into t h e door. Over-all dimensions are 31 X 28 X 60 inches. 2 Electrochemical Apparatus Electrochemical reductions a n d oxida tions can be precisely controlled with a n a p p a r a t u s now produced b y American I n s t r u m e n t Co., Inc. T h e Redox-OTrol u n i t gives a u t o m a t i c control of electrochemical reactions b y controlling either anode or cathode potential. I t has sufficient o u t p u t for preparing selec tive reduction a n d oxidation p r o d u c t s from organic compounds in substantial quantities regardless of load resistance or concentration changes. Redox-O-Trol has been used success fully in t h e preparation of pinacols of p-aminoaeetophenone a n d p-aminopropiophenone, while a t t e m p t s t o prepare (Continued on page 44 A)
