18A
ANALYTICAL
CHEMISTRY
For the most exacting clarification processes
Klett
CELITE* 521
Photometers
Specially
purified, virtually
KUtt-BuMunebaxm
iron-free
Photoelectric
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Colo*imatit No. 900-3
lUKUti m*to>U*HéU>i
No. 2071
Designed for the rapid and accurate d e t e r m i n a t i o n of thiamin, riboflavin, and other substances which fluoresce in solution. The sensitivity and stability are such that it has been found particularly useful in determining very small amounts of these substances.
T
HE finest natural filtering medium (specially selected diatomaceous silica) is processed in the J-M Laboratory, acid-treated and calcined . . . to produce Celite 5 2 1 , a pure commercial filter aid for the most exacting clarification procedures.
Free of soluble iron and other impurities which might affect filtrate quality, Johns-Manville Celite 521 serves a wide variety of industrial purposes. It is used exclusively by many makers of distilled spirits, liquors, cordials, etc., and in the filtration of chemicals, pharmaceuticals and foods. In each case clarification is better, speedier and more economical.
*KLETT SCIENTIFIC PRODUCTS^
Other Special Celite
ELECTROPHORESIS APPARATUS · BIO-COLORIMETERS GLASS ABSORPTION CELLS · COLORIMETER NEPKELOMETERS · GLASS STANDARDS · ELECT REAGENTS
Filter Aids for laboratory and commercial use:
Klett
Manufacturing
179 E A S T 8 7 T H S T R E E T
Co.
NEW YORK, N.Y.
Filter-Cel, Laboratory Standard, for the standardization of filtration procedure. Celite Analytical Filter Aid, for a n a l y t i c a l f i l t r a t i o n s of the highest type. For c o m p l e t e i n f o r m a t i o n write Johns-Manville, 22 East 40th Street, N e w York 16, N.Y. *Re8T. U . S - Pat. Off.
