LABORATORY
SERVICE CENTER
Aluminon · 4-tert-Butylcatechol · Chloranil · Chloranilic acid 3-Chlorobenzoic acid · Dimethylamine HCI · p-Dimethylaminobenzaldehyde 3,5-Dinitrobenzoic acid · Ethylenediamine sulfate · Hippuric acid L-Malic acid · Methyl acetate · Methyl nonyl ketone · Neutral red Ninhydrin · 4-(p-Nitrobenzyl)pyridine · Potassium & Sodium m-periodates Protocatechuic acid & aldehyde · Pyruvic acid · Sodium pyruvate Sodium succinate · Suberic acid · Succinimide · Taurine · Thionin Tetraethylammonium bromide, chloride & hydroxide · Xylitol · Xylose
Fractionation of Petroleum Residuals by Preparative G PC
L C SERVICES CORPORATION 165 New Boston Street Woburn, MA 01801 (617) 938-1700
Write for our Products List of over 3000 chemicals Tel: 516-273-0900 · TOLL FREE: 800-645-5566
TWX: 510-227-6230
P. O. Box 2 5 0 0
EASTERN CHEMICAL
DEPT. AC
A Division of U N I T E D - G U A R D I A N , INC.
S M I T H T O W N , Ν. Υ.
11787
USE
Laboratory Service Center (Equipment, Materials, Services, Instruments for Leasing), Maximum space — 4 inches per advertisement. Column width, 2 - 3 / 1 6 " ; two-column width, 4 - 9 / 1 6 " . Artwork accepted. No combination of directory rates with ROP advertising. Rates based on number of inches used within 12 months from first date of first insertion. Per inch: 1 " — $107; 1 2 " — $105; 2 4 " — $ 1 0 1 ; 3 6 " — $98; 4 8 " — $96. CALL OR WRITE BARBARA
LABORATORY SERVICE
AUFDERHEIDE
CENTER
ANALYTICAL CHEMISTRY 25 Sylvan Road South P.O. Box 231 Westport, Ct. 06881 203-226-7131 INDEX TO ADVERTISERS IN THIS ISSUE CIRCLE INQUIRY NO.
ADVERTISERS
3
* Alltech Associates Chromad
4
* Analect Instruments Analect Advertising
1
Analytichem International Forsythe Advertising, Inc.
18-19
J . T. Baker Chemical Co Stiegler & Wells
23
Beckman-lrvine Cochrane, Chase, Livingston & Co.
28-29
* Bioanalytical Systems Kissinger Advertising Associates
12
Bio-Rad: Digilab Div
PAGE NO. 1114A 1027A 1134A 1033A.1097A 1099A 1070A.1089A
CIRCLE INQUIRY NO.
ADVERTISERS
PAGE NO.
64-68
* Fisher Scientific
1109A-1111A, 1113A,1115A,1116A
69
* Foxboro TCI Advertising, Inc.
98-99
* Gilson Medical Electronics LaPointe, Schott & Smith, Inc.
95
Haake Buchler Conceptual Marketing
1079A
103
HCA—International Thompson Recruitment
1056A
96-97,101
* Hewlett-Packard Company Pinne, Garvin & Hock, Inc.
xx
Hewlett-Packard Company
1082A 1017A
1051A.1120A
1128A
Pan & Associates
1105A
J. Walter Thompson 14
Bomen, Incorporated
1055A
30
* Sybron/Brinkmann
OBC
110
HNU
1074A
112
IBM Instruments Chope Communications Instrumentation Laboratory Aries Advertising, Inc.
1089A
Lavey/Wolft/Swift 21
Burcon, Incorporated
1107A
17
1140A
37
* Burdick & Jackson Laboratories, Inc Nordstrom/Cox Marketing Camag Werbeagentur CBS * Carle Instruments
32
Carlo Erba Strumentazione
1039A
36
* Chrompack, Inc Lohmeyer Simpson Corporation Scientific
1056A
35
1083A
1036A
Knollwood Advertising Group
34 51
* Dionex Corporation LaPointe, Schott & Smith, Inc.
54
Dynamics Solutions Whitestone Studio
1142 A ·
1026A
1020A-1021A 1065A
ANALYTICAL CHEMISTRY, VOL. 55, NO. 1 1 , SEPTEMBER
114
1060A
116
* Instruments SA, Inc Kathy Wyatt & Associates
1045A
104
* ISCO, Inc. Environmental Division Farneaux Associates
1088A
105
Jarrell-Ash Buzzard Advertising
107
* JCPDS
1083A
106
* Johnson Matthey, Inc Yeremian Advertising Associates
1049A
121
· Kevex Corporation Commart Communications
122-123
* * Kontron
1983
1141A
IFC 1048F.1048H
