E M Reagents ® Ε. MERCK, DARMSTADT, GERMANY
T h e r i g h t w a y to optimal s e p a r a t i o n s Preparations for
Thin-layer chromatography Preparative layer chromatography Column c h r o m a t o g r a p h y H i g h performance liquid c h r o m a t o g r a p h y Gel chromatography Cellulose derivative ion exchangers
Silica gels 4 0 , 6 0 , 100 (Â p o r e d i a m e t e r ) M a c r o p o r o u s Silica gels, Merckogel® SI (max. 2 5 0 0 0 A) S i l a n i z e d Silica g e l (hydrophobic)
A l u m i n u m Oxide T y p e Ε a n d Τ K i e s e l g u h r · Cellulose · Cellulose i o n e x c h a n g e r s Merckosorb® · Perisorb® · Merckogel® O R - P V A
E M Laboratories, Inc., associate of E . M e r c k , D a r m s t a d t , G e r m a n y 500 E x e c u t i v e B o u l e v a r d , E l m s f o r d , N e w Y o r k 10523 • T e l : 9 1 4 / 5 9 2 - 4 6 6 0 CIRCLE 6 5 ON READER SERVICE CARD
ANALYTICAL CHEMISTRY, VOL. 46, NO. 13, NOVEMBER 1974 • 1089 A
