Problem: Rapid determination of molecular weights, or t h e r m o d y n a m i c states of synthetic and natural m a c r o m o l e c u l a r substances. Solution: HELLFRITZ OSMOMETER, one or two c h a m b e r t y p e s , in glass or metal. 5 to 7 ml required for measurement, w h i c h takes only 11/2 to 4 hours d e p e n d i n g on m e m b r a n e used. Also g o o d for measurements at higher t e m perature (up to 130° C). Bulletin 87.
SOLUTIONS to your solution problems
Problem: How to gain fast, accurate pH readings. Solution: PAN-pH INDICATOR PAPERS. Panpeha gives one of 25 possible pH readings with one dip. Range in half stop readings from 0.1 to 10. Full stop readings from 10 to 14. 200 strips, c o m p l e t e directions, and master chart c i r c u m v e n t i n g box. For field studies or lab testing. Bulletin 45. Problem: Extra strength faster filtering paper. Solution: Exceptional high wet-strength, " t e a r - p r o o f " f o l d e d filters with advantage of larger effective filter area than conventional filters. Numerous densities, sizes 12.5 up to 32 c m . Resistant to corrosive and o r g a n i c solutions. Bulletin 142. Problem: To extract fats, corrosive liquids and hot gases. Solution: For fats, 603 seamless, sturdy, cellulose fiber thimbles. Corrosive liquids and hot gases require glass media 703 thimbles. For additional information contact your laboratory supply dealer, or S c h l e i c h e r & S c h u e l l , Inc., Keene, New Hampshire 03431. (603)352-3810 the first name in filtration
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