HOW TO EFFICIENTLY CHELATE IRON THROUGHOUT pH RANGE...
THE
Versenes®
VERSENE REGULAR
VERSENE REGULAR
pH 2 . 0 — 7.0 R E A S O N FOR USE most l i a b l e c h e l a t e , m o s t economical. COMMENTS best chelating agent for iron in acid solutions. Also chelates other polyvalent metals throughout pH range.
VERSENE fe-3 SPECIFIC
pH
r
7.0 — 1 2 . 5
VEKIN-Ol® 3.0—12.5
R E A S O N F O R USE firs) ehelotes iron, then, until exhausted, deactivates other poly valent metals. COMMENTS d o not use with strong oxidants.
VERSENE Fe-3
pH
SPEED, ACCURACY and EASY READING for SERIES WEIGHING
VERSENE Fe-3 SPECIFIC
'Efficiently chelates iron in p H r a n g e from 7 t o 12.5. Q u a n t i t y of Versene F e - 3 Specific m u s t b e increased to k e e p a given a m o u n t of iron i n solution a s p H in creases.
R E A S O N FOR USE v e r y s t a b l e c h e l a t e , most economical. COMMENTS q"o not vse with strong oxidants.
pH
'(original E D T A ) — A n ex cellent C h e l a t i n g (complexing) A g e n t for iron in acid p H r a n g e . Loses effective ness for iron a s p H increases a b o v e 7. Also chelates o t h e r polyvalent metals through out p H range.
VDF PRECISION TORQUE BALANCE
2.0—12.5
R E A S O N FOR USE chelates limited quantities o f iron plus targe amounts of other metal ions if present. COMMENTS ratio of iron in olkoline solution must not be excessive to the Versene Fe-3 used. Strong oxidants may reduce effectiveness of this component.
VERSENI-T
pH 1 2 . 5 to high cone, of Caustic R E A S O N FOR USE prevents precipitation of iron or dissolves iron rust in caustic solutions. COMMENTS do not use with strong oxidants.
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VERSEN-OL® (Ν-hydroxy e t h y l e t h y l e n e diamine triacetic acid tri sodium salt.) Similar to Versene Fe-3 in effect. Differs by first inactivating any iron ions present before going on to Ca, Mg and other poly valent metal ions. Reacts with all polyvalent metals on a mole-to-mole ratio. At high pH's, it loses some efficiency for iron, and more is re quired. VERSENE Fe-3 (A physical blend of Versene Regular and Versene Fe-3 Specific.) Combines effect of both compounds but each works independently. The Versene Regular component acts only toward polyvalent metal ions other than iron but the Versene Fe-3 Specific component specifically che lates the iron in alkaline solutions. ^ VERSENE-T 'Most efficient iron Chelating Agent known for use in caustic solutions. Will not function unless free caustic is present. Also chelates other metals including Ca, Mg, Cu, Ni, Co, etc. N O T E : Iron Chelating Agents con taining hydroxyl groups may he oxidized by peroxide, chlorine, hypochlorite, etc. which destroys the ethanolic groups. Hence, only Versene Regular is recommended when complete stability is required in presence of strong oxidants. Ask for Technical Bulletin $2. Compe tent Counsel available for those who want maximum chelating efficiency at minimum cost.
The inher ent speed and accuracy ol these balances make them highly suitable for use in rilling operation involving ampoules, cap sules or powders and for weighing materials subject to atmos pheric deteriora tion. The sensi tivity, minimized oscillation of the read ing hand together with the elimination of par allax errors and the absence of axle friction per mits exceptionally good reproducibility. Advanced design does away with similar parts easily damaged.
point
bearings
or
MODEL C $198.00 Cat. No. 12203 0-500 mg., max. load 2000 mg. {with attachment weights) Value of 1 scale division at 0-500 mg. is 1 mg. (Other Models available up to a capacity of 22 grams with scale di vision values ranging from 0.002 mg. to 0.02 gr.) A c c e s s o r i e s a r e a v a i l a b l e f o r s p e c i a l p u r p o s e s , i . e . m e a s u r i n g surf a c e tension, d e t e r m i n i n g specific g r a v i t i e s , b l o o d
analyses.
Bulletin V D F available on request.
NEW YORK VERSENES INCORPORATED (FORMERLY
BERSWORTH
CHEMICAL
CO.)
F R A Ml Ν G IIΛ Μ. M A S S Λ C H U S Ε Τ Τ S Circle number 10 A-1 an Readers' Service Card, page 39 A
10 A
NYLAB KEY TO ALL LABORATORY SUPPLIES
Laboratory
Supply COMPANY INC.
76 Varick Street, New York 13, Ν. Υ. Telephone:
CAna!
6-6504
Circle number I I A-i on Readers' Service Card, page39A
ANALYTICAL
CHEMISTRY
