UNKNOWN MIXTURE
tfAPOR
MOIItL 1Ί4 D FRACTOMtTER
SFPARATION BY VAPOR FRArtTQMFTFR: Fi,irfng r a m shows quantities of individual components in unknown mixture separated and collected, but as yet unidentified.
component
A component
.
Β ^ component
c
IDENTIFICATION BY I R : C o l l e c t e d c o m p o n e n t s r u n m s t a n d a r d m i c r o c c l l o n M o d e l 2 2 1 , u s i n g scrile c o m p r e s s i o n t o include? on t i r e a n a l y s i s u n s m p j e c h a r t , a r e i d e n t i f i e d as A. n-butyl a l c o h o l : B, cycloh e x a n o n e ; C, c y c l o h e x a n o l . IR r u n o f m i x t u r e i s n o t essential, b u t may be valuable t o analyst i n some cases
MODEL 2 2 1 INFRARED SPECTROPHOTOMETER
HOW GAS CHROMATOGRAPHY AND INFRARED TEAM UP TO ANALYZE DIFFICULT MIXTURES FAST... ACCURATELY Extend your analytical capabilities by teaming up PerkinElmer gas chromatography and Perkin-Elmer infrared spec troscopy to take advantage of the special features of each. This combination gives you greater speed and accuracy — both qualitative and quantitative — than either technique alone, in analyzing such mixtures as close boilers, isomers and similar hard-to-separate compounds. In practice, an unknown mixture is separated into pure fractions by a P-E Model 154-D Vapor Fractometer as it records a fractogram, giving quantitative peaks for the sepa rated components. The individual components, cold-trapped or collected in a solvent as they elute from the instrument, are then run in an infrared spectrophotometer such as the Perkin-Elmer Model 221. The IR spectrum of each of the collected samples provides positive qualitative and quanti tative identification.
Both the Model 154-D and the grating Model 221 are the most advanced instruments of their type, each offering unusual versatility, speed and accuracy. And special P-E accessories further enhance their usefulness. For example, capillary columns (U.S. Patent No. 2,920,487) and ioniza tion detectors for gas chromatography, plus accessory beam condensers for IR examination of micro-samples, allow analyses of small samples beyond the scope of conventional equipment. For complete information on these new P-E instruments, and how they team up to form an even more powerful analytical system, write to us today. I N S T R U M E N T
D I V I S I O N
Perkin-Elmer Corporation N O R W A L K ,
C O N N E C T I C U T
Circle No. 80 on Readers' Service Card
VOL. 32, NO. 9 , AUGUST 1960
·
65A
