LABORATORY
SERVICE CENTER Molecular Weight by Laser Light Scattering
m - A m i n o p h e n o l · A m m o n i u m Purpurate · Bis-(2-Hydroxyethyl)glycine & N a Salt Bromoacetaldehyde Diethylacetal · 1-Bromonaphthalene · Cellobiose a - C h l o r a l o s e · Chloranil · D i m e t h y l a c e t a m i d e · 3 , 3 - D i m e t h y l g l u t a r i c A c i d Dipicolinic A c i d · D i t h i z o n e · Esculin · 2 - H y d r o x y - 1 , 4 - n a p h t h o q u i n o n e H y d r o x y l a m i n e HCI & Sulfate · I m i d a z o l e · Isatin · M a l o n i c A c i d M a l t o s e · M e t h y l A c e t a t e · M e t h y l a m i n e Hydrochloride · N e u t r a l R e d N-Phenylglycine · P i m e l i c A c i d · Pyruvic A c i d · S o d i u m - 3 - H y d r o x y b u t y r a t e S o d i u m M a l o n a t e · S o d i u m Pyruvate · S o d i u m T e t r a p h e n y l b o r o n · X y l o s e Write for our Products List of over 3000
gpc
chemicals
Absolute molecular weight by low angle light scattering Molecular weight distribution by GPC Fast, cost effective setvice Call or write lor our brochure
TWX: 510-227-6230
Tel: 516-273-0900
• •
Cambridge Analytical Associates
EASTERN CHEMICAL D i v i s i o n of G U A R D I A N C H E M I C A L
CORP.
222 Arsenal Street. Watertown. HA 02172 telephone (617) 923 9376
P.O. Box 2 5 0 0 OEPT AC
HAUPPAUGE, Ν. Υ. 11787
L a b o r a t o r y S e r v i c e C e n t e r (Equipment, M a t e r i a l s , S e r v i c e s , Instruments for Leasing), M a x i m u m s p a c e — 4 inches per advertisement. Column width, 2 - 3 / 1 6 " ; t w o - c o l u m n width, 4 - 9 / 1 6 " . A r t w o r k a c c e p t e d . No c o m b i n a t i o n of directory rates with R O P advertising. R a t e s b a s e d o n number of inches used within 1 2 months f r o m date of first insertion. Per inch: 1 " — $ 8 5 ; 12" — $84; 2 4 " — $ 8 1 ; 36" — $78; 4 8 " — $77.
CALL
OR
WRITE
BARBARA
USE LABORATORY SERVICE CENTER
ADFDERHEIDE
ANALYTICAL CHEMISTRY 25 Sylvan Road South Westport, Ct. 06881 203-226-7131 INDEX TO ADVERTISERS IN THIS ISSUE CIRCLE INQUIRY NO.
XX 11 7 3 9 10 8 2 6 4 26, 28 17, 20 23 18 19, 27
*Air
ADVERTISERS
Agriculture Canada Products & Chemicals, Inc Lewis & Gilman, Inc. Alcatel Vacuum Products W. J. Hearn & Co., Inc. AlHech Associates, Inc Chromad Agency 'Alpkem Corporation Angstrom 'Applied Research Laboratories J. B. Talmadge & Company, Inc. · Applied Science Div., Milton Boy Co Science Advertising Assoc. Ashland Chemical Co Marsteller, Inc. 'Atago Co., Ltd Echo Japan Corporation 'Balrd Corporation Buck & Berglund, Inc. ' J- T. Baker Chemical Co The Stiegler Agency Barnstead Marketing Dimensions, Inc. Bausch & Lomb/ASD Blair Advertising, Inc. ' B e c k m a n Instruments, SID
PAGE NO.
738A 743A 722A
INQUIRY NO
240 241 50
668A
XX
741A 752A 677 A
63
732A
68
759A
67
693A
65, 66 88
661A, 666A 655A, 718A
69
87 89
7 0 8 A
86 686A
90-93
673A, 772A
98
737A
95
OBC, 711A
97
Ayer, Jorgensen, MacDonald 25
'Bloanalytlcal Systems, Inc Kissinger Advertising Assoc. 2 1 , 2 2 , 2 9 , 30 . . . 'Brlnkmann Hanson, Fassler & Associates 31
'Bruker Instruments, Inc Techmarketing
680A
24
*Burdick & Jackson Lab., Inc Studio 5 Advertising, Inc. ' C a r i e Instruments Mealer & Emerson Advertising
738A
242
751A
99 105 106 107
AOVERTISERS
Corco Chemical Corporation SIT/COM 'Cosa Corporation Jarman, Spitzer & Felix, Inc. Digital Pathways Associated Ad'Ventures Inc. 'Eastman Kodak Company Rumrill-Hoyt, Inc. EG&G Princeton Applied Research The Message Center, Inc. *'Farmitalla Carlo Erba Publicitas Farrand Optical Technell, Inc. 'Flnnlgan Corporation Finnigan Advertising 'Fisher Scientific Co Galileo Electro-Optics Corp Edward E. Heske Assoc. 'Gilford Instrument Laboratories, Inc Oberlin Industrial Advertising # Gilson Medical Electronics Fred Schorl, Inc. 'Gould, Inc./lnstr. Dlv., Carr Liggett Adv., Inc. Gow-Mac Kenyon Hoag Associates Haake, Inc Conceptual Marketing, Inc. Hach Company Art Service/Technical Promotions "Hamilton Company Mealer & Emerson Advertising ' H N U Systems, Inc Instrumentation Laboratory Aries Advertising, Inc. · Jarrell-Ash Dlv./Flsher Scientific Co Johnson Matthey Compton Advertising, Inc.
PAGE NO
692A 741A 671A 753A 719A 718H &62A 754A 68SA, 709A 715A 726A 674A 757 A 716A-717A β9βΑ 742A 678A-679A 7S0A 689A 707A 672A
