Whatman
Membranes.
New. Cellulose nitrate and PTFE membrane filters of the quality for w h i c h W h a t m a n filter papers are w o r l d - f a m o u s . In a c o m p l e t e range of popular pore sizes and diameters. Performance w h i c h is not only generally superior to competitive laboratory membranes, but is reliably consistent. Pore size d i s t r i b u t i o n is narrow and more u n i f o r m . Thermostability is o u t s t a n d i n g . Shrinkage is minimal and performance differences are markedly less after autoclaving than those characteristics of other laboratory membrane filters. Extractables are low, and they are virtually pyrogen-free. And they are physically t o u g h , yet flexible.
L4J
In performance and in every quality aspect you w i l l , w e t h i n k , f i n d W h a t m a n m e m b r a n e filters clearly better than the membrane filters you may be using n o w . They are, after a l l , Whatman
membranes.
Available only f r o m approved laboratory supply dealers. Contact your dealer for some very interesting technical i n f o r m a t i o n . Whatman Paper Division 9 Bridewell Place, C l i f t o n , New Jersey 07014 Tel: (201)773-5800
Whatman
CIRCLE 234 ON READER SERVICE CARD
