tacts on Infrared/or
the laboratory
The ONLY complete range of infrared instru
Analyze Solids As Easily As Liquids With New Potassium Bromide Die The evacuable Potassium Bromide die is a revo lutionary step forward in the infrared analysis technique. With the die, quantitative analyses can he run on solid materials that previously could be handled only as solutions. A weighed amount of sample is ground and mixed with powdered KBr. The mixture is then pressed in the die into a clear window. Developed for use with all Perkin-Elmer infra red instruments, the new die provides windows 13 mm in diameter. A disc holder is available that permits positioning the discs in the standard microcell adaptor. No special optical condensing sys tem is needed for full energy utilization. Experience has shown that an evacuable die is needed for best quantitative results. Other fea tures of the Perkin- ._— Elmer die include: a split cone for easy r e m o v a l of the pressed disc, rug ged c o n s t r u c t i o n and careful design for long life. A 20,000-pound labora t o r y p r e s s and a small vacuum '^Β^^ΗΙΓΙΙΙΒΡ f p u m p are neces s a r y a u x i l i a r y —equipment. Part numbers and prices are as follows : 021-0106 Evacuable KBr die $465.00 021-0107 Disc Holder 20.00 We will be pleased to provide additional infor mation on the new die and its applications. The Perkin-Elmer Corporation, 8 0 0 Main Avenue, N o r w a l k , Conn. Regional Offices: N e w Orleans, Chicago a n d Washington, D. C.
WORLD'S LEADING MANUFACTURER OF INFRARED ANALYTICAL EQUIPMENT
PERKIN
ELMER
ments and accessories to meet all research needs! Model 12-C Infrared Spectrometer — a tested single beam instrument for routine control applications.
Model 112 Double Pats Infrared Spec t r o m e t e r — s i n g l e b e a m , h i g h resolving power, excellent for structural analysis. S u i t a b l e a t t a c h m e n t s for a l l s p e c t r a l ranges. Write for Bulletin 102. Model 21 Double Bec m Infrared Spectro photometer—The fastest and most efficient instrument commercially available for the recording of large numbers of spectra. Records directly in percent transmission. Write for Bulletin 104. Model 13 Ratio Recording Infrared Spec trophotometer—Records double or single beam with many features of both the Model 112 and 2 1 . Ideal for the small laboratory with a wide variety of problems. Writ» for Bulletin 110. 'ίίΓ^ί
ACCESSORIES:
fi fit i f ·_»>· ' *
Demountable Cell—may be assembled to any thickness—for liquids, capillary films, mulls of solids—and films and powders. Fixed Thickness Liquid Cell—for nearly all liq uids and solution work. Standard thickness be tween 0.025 and 1 mm—others to order. Standard Gas C e l l s - 2 , 5, 10 cm and 1 and 10 m path lengths for various absorption studies. Microcell—obtains good spectra with 25-100 m i c r o g r a m s — a v a i l a b l e in thicknesses f r o m 0.025 lo 3 mm. V a r i a b l e S p a c e L i q u i d Cell —has a c c u r a t e l y variable path length of 0 to 5 mm to bring out features of a spectrum and to compensate for solute absorption in double beam spectrometry. Reflectance Attachment—for specular reflectance studies of solid materials. Pressure Cells —for l i q u i d s or gasses; p a t h lengths from 0.025 to 50 mm, p.essures up to 300 psi. Useful in trace absorption or overtone work. Long and short sizes. Heating Stage and Heating Stage Power Sup ply—used with above attachment; permits heat ing to about 300 C. For studying polymeriza tions and oxidations. Cycling feature of the Model 21 automatically records reaction stages taking place. Polarizer—for studies of crystal and molecular orientations. Rotable Cell—To assist in sample orientation for polymerization studies. Microscope—For analysis of samples of few microns in size as single fibers, tissues, crystals, etc. Write for Product Bulletin A-3 for more inforniatior about these accessories.
For further information, circle numbers 14 A - 1 , 14 A-2, 14 A-3, 14 A-4, 14 A-5 on Readers' Service Card, page 41 A
14 A
ANALYTICAL
CHEMISTRY
