F o r New C o n v e n i e n c e in F i l t r a t i o n s • . .
NYLAB'S improved
F I L T E R BELL
VERSENES® — KEYS TO CHELATION
Not so long ago "Chelation" and "Versenes" were little known, unfamiliar words. Today, however, practically every chemist understands that chelation is the chemistry of metal ion control and that the Versenes are the chemicals that make it work. Over the last quarter-century Bersworth and Versenes Incorporated have pioneered and developed this new concept of trace metal control to a point where it has now become a leading chemistry of our time. MOLE-FOR-MOLE TRACE METAL CONTROL
Probably nothing creates more complexing problems in industrial, agricultural or medical chemistry than excesses .or deficiencies of metallic ions. Prior to chelation and the Versenes there was no specific way to solve them. But now, the Versenes provide exacting mole-for-mole control over trace metals throughout the pH range. APPLICATIONS UNLIMITED
Whenever you have a problem that involves the control of metallic ions you are invited to share our accumulated research, knowledge and experience in this field. We can help you stabilize pharmaceuticals; prepare pure metal compounds; improve wet processing of products and prevent or remove stains in textiles, tanning or paper; get better control over polymerization or hard water scale; secure clear and brilliant solution formulations; obtain more efficient soaker alkali formulations; remove rust without embrittlement; develop up-to-date analytical procedures; cure chlorosis in plants, etc.; treat heavy metal poisoning; insure chemically clean surfaces for metal finishing; increase detergency of soaps and synthetics; get better "kills" with quarternary sanitizers. Send for Technical Bulletin No. 2. Ask for samples. Chemical Counsel on request.
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Cat. No. 35070
$10.75
M i n i m u m Inside Dimensions: Diam. 90 M M ; side 120 M M ; H t . a t center 150 M M .
Ht. at
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Smooth, efficient valve action with a redesigned Slide Valve featuring flat ground surfaces.
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Vacuum-tight closure assured b y a soft gasket acting against a glass b o t t o m plate.
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Any t y p e vessel m a y be used to receive the filtrate.
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Permits wide choice of t y p e and size filter funnel using rubber stopper mounting.
rubber
NYLAB'S .
«A SLIDE V A L V E — Slide Valve:
^
5Q
Cat. No. 35075
ft
Permits aPpUcation or r e l e a . ^ vacuum in the bell jar « filtration vacuum in other P ^ 0 ^ w i t h ordisystem . / . ^ . ^ 6 manner as with S b e n ' * " & . « £ £ * utUity alone.
VERSENES INCORPORATED (FORMERLY
BERSWORTH
FRAMINCIIAM,
CHEMICAL
CO.)
MASSACHUSETTS
WAREHOUSE STOCKS Chas. S. Tanner Co., Liberty Life Bldg., Charlotte, N . C. Kraft Chemical Co., Inc., 9 1 7 West 18th Street, Chicago 8, Illinois Independent Chemical Corp., One Hanson Place, Brooklyn 1 7 , New York G e o r g e Mann & Co., Inc., 2 5 1 Fox Point Boulevard, Providence, Rhode Island B a r a d a & Page, Inc., Houston, Dallas, Corpus Christi, New Orleans, St. Louis, Wichita, Oklahoma City, Tulsa, Kansas City, M o . Braun-Knecht-Heimann Co., Son Francisco, California V a n Waters & Rogers, Inc., Seattle, W a s h . & Portland, O r e . Braun Corporation, Los Angeles, California European Manufacturing Agent Rexolinfabriken Aktiebolag, Hetsingborg, Sweden
Circle No. 10 A-1 on Readers' Service Card, page 43 A
10 A
NEW YORK KEY TO AIL LABORATORY SUPPLIES
Laboratory Supply COMPANY INC 7 6 Vanck S'r e», N e w York Teh phone:
CAnai
1 3, Ν
Υ.
6-6504
Circle Nos. 10 A-2, 10 A-3 on Readers' Service Card, page 43 A
ANALYTICAL
CHEMISTRY
