rrcuuuoι
aii»Kia^*ii«>:
Leash your
QQ
to the
Do you have a hypothesis?
Refined
CHROMALYT'08 : ;
TO SNIFF OUT TRACE ORGANICS IN GASES LIQUIDS, OR SOLIDS Now with direct-mounted purge-tube assembly
\^fc
'•••^RESEARCH
c^tENTRATQR
•Jf
Let us supply the
•X·
CHEMICALS ORGANICS & INORGANICS
(203)357-8700
Get better chromatograms uuith HPLC Accessories Our bulletin, HPLC Accessories, describes ways to protect and enhance the performance of high pressure liquid chromatographs. A column inlet filter protects the inlet frit from plugging. A pressure relief valve protects your equipment from overpressure through the 2000 to 7000 psi range. A pneumatic actuator offers automatic operation. Switching valves, tube fittings and valve mounting plates are also described. WRITE FOR YOUR COPY TODAY
Send for the latest
PFALTZ & BAUER CATALOG
The 1047 Concentrator Is inexpensive and easily attached to any commercial gc. Its unique combination of differential adsorption with thermal desorption allows rapid, quantitative, reproducible ppb analyses of gaseous, liquid, and solid samples.
INDUSTRIES. INC
«(201)549-7144
1
of over 40,000 "easy-to-find"
listings
1 PFALTZ & BAUER, INC. division of Aceto Chemical Co., Inc.
375 Fairfield Ave., Stamford, Conn. 06902 Tel: (203) 357-8700
1 frfmf iWiïïl I rmtfi fmWl\ I BOX 798. METUCHEN. Ν J 08840 CIRCLE 3 6 O N READER SERVICE
CARD
CIRCLE 2 3 O N READER SERVICE CARD
New Reagent Chemical target Catalog Ashland's new 24-page Target® Reagent Chemical catalog presents typical ana lysis for the complete reagent line. Includes reagent grade acids, inorganics and special ties suitable for laboratory, analytical and other puritycritical applications. All meet ing stringent standards of quality. Let one of Ashland's 58 IC&S locations be your source of reagent chemicals. Write to Industrial Chemicals and Solvents Division, Dept.TRC, P.O. Box 2219, Columbus, Ohio 43216 for your free Target catalog.
Ashland Chemical Company CARD CIRCLE 6 O N READER SERVICE
m
CIRCLE 2 5 O N READER SERVICE
CARD
PRODUCT PROSPECTUS Reply card issues of C&EN generate more than 1 0 , 0 0 0 inquiries each.
This new
Product Prospectus page has been specifically designed to this
further active
accommodate usership.
CARD
It
features an array of prod ucts keyed for inquiry and is
conveniently
situated
opposite the reply card.
Ashland. CIRCLE 2 8 O N READER SERVICE
Rheodyne Incorporated, 2809 Tenth Street, Berkeley, California 94710. Phone (415) 548-5374.
