INSTRUMENTATION by Ralph H. Müller
New Podbielniak Chromagraphette
V a p o r Phase Chromatography Advancing Rapidly in vapor phase chromaADVANCES tography continué a t a dizzy pace
mately 30 feet in length. A general view of t h e Chromagraphette is shown in and i t is hardly possible t o describe, t h e photo above. in these pages, all t h a t is new in t h e T h e above new addition in t h e low way of instruments, techniques, a n d price field is a n excellent supplement applications. Podbielniak, I n c . , 341 t o t h e widely used Podbielniak Series of E a s t Ohio St., Chicago 1 1 , 111., a n Chromacon models·—designed for operanounces still another model—one of tion a t atmospheric and reduced presseveral instruments which t h e y m a n u sures a n d with operating temperature facture—which is designed t o analyze a ranges from 20° t o 375° C. This series wide variety of compounds. has m a n y specialized modifications such as f a t t y acid applications, petroleum T h e n e w Chromagraphette Series field, fuel gases, and other special units 9490 is scientifically designed for simple designed a t t h e request of various inand rapid analysis of the great group of dustry groups. Chromacon Model gases and vaporizable mixtures. I t is a 9475, for example, h a s been designed desk model, designed for use in the labot o accommodate analyses of m e t h y l ratory or in t h e field. T h e low power esters of f a t t y acids u p t o C 2 and of required-—150 w a t t s a t 115 volts, 60 f a t t y acids u p t o C 2 0 in less t h a n 20 cycle—permits t h e use of this a p p a r a t u s minutes. Automatic area plotting is in panel trucks for field analysis. available in a n y model using a recorder. T h e Chromagraphette is capable of E i t h e r a mechanical o r t h e newly analyzing gaseous a n d liquid mixtures developed Podbielniak electronic intefor components boiling u p t o 125° C. grator is available. M a x i m u m operating t e m p e r a t u r e is 100° C. I t is applicable to the analysis T h e new Chromagraphette does n o t of hydrocarbons from m e t h a n e through replace t h e portable, suitcase t y p e , nonane a n d other components having pocket edition, widely-used Series 9495 similar boiling point range. Special Chromanette-—-a field unit for on-thefeatures a r e : 10 m v . recording potenspot analyses limited t o ambient temtiometer, which is Optional; interperatures changeable sampling system for either An extension of the laboratory appliliquids or gases; a n improved highly cation of vapor phase chromatographic sensitive thermistor-type thermal contechniques t o industrial purification of ductivity cell a s a detector; a n d acliquid o r gaseous materials is accomcommodation of columns up to approxiplished in a Podbielniak vapor phase
chromaneer plant. This method of operation gives a product of extreme purity regardless of the boiling point of contaminating materials, with continuous, automatic operation. T h e combination of any Podbielniak vapor phase chromatographic u n i t with t h e new completely automatic T h e r m o con low-temperature or t h e Hyper-cal high-temperature steps u p accuracies and speeds time of distillation. Such combinations form a powerful b a t t e r y of analytical instruments for t h e separation, analysis, a n d further s t u d y of any gaseous or vaporizable liquid mixture.
Vapor Phase Chromatography Classes Podbielniak I n s t i t u t e announces class schedules o n vapor phase chromatographic technique and low-and-high temperature distillation. This new schedule, detailed below, will be conducted during four 2-week sessions during 1957-58. T h e institute is a self sustaining, nonprofit school. T h e Podbielniak I n s t i t u t e was organized a year ago as a n experimental project in a n effort t o serve industry as expeditiously a s possible in the new methods of analysis which a r e being made available to industry more rapidly VOL. 29, NO. 10, OCTOBER 1957
·
67A
INSTRUMENTATION
\m/?M
INSTRUMENTS
provide greater
provide greater
provide greater
versatility
accuracy
reliability
... by the use of advanced design principles which insure maximum performance permitted by the state of the art, and developments which provide sensitivity, stability and reproducibility which cannot be obtained with other makes of standard instruments.
For example, sapphire and car· boloy is used at points of critical wear; kinematic principle* are employed wherever position* or motions must be precise and reproducible; and circuits are designed so even large change* in characteristics of vacuum tubes and other components wilt not affect performance.
...through a wider choice of operating ranges, response speeds, sizes and types of samples, sensitivity, and a variety of accessories and custom adaptations for special problems. Cary instruments are used for exacting analytical work of all typesfrom plant process control to complex research problems.
INSTRUMENTS FOR ANALYTICAL RESEARCH i AND PROCESS STREAM CONTROL I i ! RECORDING SPECTROPHOTOMETERS-For r a p i d
recording of spectra with good resolving power and high photometric accuracy. Provide the ruggedness arid reliability needed for routine laboratory use, plus the flexibility to handle a variety of problems in the research laboratory. RAMAN SPECTROPHOTOMETER-Uses a u n i q u e
optical system which gives high light-gathering power, high zero stability a n d freedom from effects of scattered light. Provides the advantages of raman spectroscopy with small samples, high speed and good accuracy. ELECTROMETERS—Vibrating reed instruments for measuring very small currents, charges and voltages. High sensitivity and accuracy, good stability and reliability. Available for many applications — p H and carbon 14 determinations, mass spectrometry, etc. INFRARED ANALYZERS-For continuous analysis of flowing samples. Utilize selective detection and double beam optical system. Virtually free from zero drift. High inherent discrimination against interfering sample components. Unusual adaptability t o difficult analytical problems requiring high sensitivity and accuracy in complex mixtures. ULTRAVIOLET ANALYZERS-Provide a simple, reliable means of continuously analyzing flowing samples for components which absorb UV or visible radiation, or which can be converted t o 8 suitable absorbing substance.
For complete descriptions, including sample curves, of all of Cary instruments, write for Bulletin AC-SO.
68 A
INSTRUMENTS
APPLIED P H Y S I C S CORPORATION 362 West Colorado Street Pasadena 1, California
For further information, circle number 68 A on Readers' Service Card, page 87 A ANALYTICAL CHEMISTRY
t h a n t h e y can be t a u g h t i n t h e schools. Their ever increasing importance is creating a great d e m a n d b y industry for trained analysts. I t will b e noted, b y reviewing t h e schedule, t h a t those interested i n combining 1 week of low-and-high t e m p e r a t u r e distillation with 1 week of vapor phase chromatogr a p h y m a y enroll for this combination course, or m a y enroll exclusively for a 2-week training period in vapor p h a s e chromatographic techniques. The training schedule offered is a wellplanned combination of theory and p r a c tical application packed into a highly intensive 2-week course. E q u i p m e n t for training purposes—an investment of $100,000—has either been donated or purchased by t h e school. T h e regular teaching staff consists of lecturers w h o a r e authorities in their field. Guest lecturers are invited t o aid in presenting their latest accomplishm e n t s . E a c h class has scheduled guest lecturers w h o a r e well-versed in t h e m e t h o d s of analysis or who h a v e special knowledge which m a y be helpful in rounding o u t the courses. T h r o u g h t h e cooperation of a u t h o r s from all over t h e world, t h e Podbielniak I n s t i t u t e h a s been able t o compile a library of technical articles concerned with latest developments a n d t r e n d s in vapor phase chromatography and distillation. N e w course outlines a n d application blanks, together with school brochure, setting forth future plans of Podbielniak I n s t i t u t e are available u p o n request a t t h e Podbielniak I n s t i t u t e , 341 E a s t Ohio St., Chicago 11, Illinois. 1957-58 Schedule of four sessions for 2-week periods Date Sessions September 23rd t o September 28th, 1957 1 week Low a n d high temperature distillation* September 30th to October 12th, 1957 2 weeks Vapor phase chromatographic techniques December 2nd t o December 14th, 1957 2 weeks Vapor phase chromatographic techniques March 3rd to March 8th, 1958 1 week Low and high temperature distillation March 10th t o March 22nd, 1958 2 weeks Vapor phase chromatographic techniques May 5th to May 17th, 1958 2 weeks Vapor phase chromatographic techniques * Special classes for those only interested in 1 week of distillation and 1 week of vapor phase chromatography.
