Whatman New. Cellulose nitrate and PTFE m e m b r a n e 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 p o p u l a r pore sizes and diameters. Performance w h i c h is not o n l y generally superior to c o m p e t i t i v e laboratory m e m b r a n e s , 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 . T h e r m o s t a b i l i t y is o u t s t a n d i n g . Shrinkage is m i n i m a l and p e r f o r m a n c e differences are markedly less after autoclaving than those characteristics of o t h e r laboratory m e m b r a n e filters. Extractables are l o w , and they are virtually p y r o g e n - f r e e . A n d they are physically t o u g h , yet f l e x i b l e .
Membranes. In p e r f o r m a n c e 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 y o u may be using n o w . They are, after a l l , Whatman
membranes.
Available only f r o m a p p r o v e d laboratory supply dealers. Contact y o u r dealer for some very interesting technical i n f o r m a t i o n . W h a t m a n Paper Division 9 Bridewell Place, C l i f t o n , New Jersey 07014 Tel: (201) 773-5800
Whatman
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