NEWS Chemical and Petroleum Instrumentation Session
Engineering Reliability into Process Control, Thursday morning; and Process Information and Measure ments Techniques, Thursday after-
Other instrumentation sessions will be devoted to Meteorology, Cement and Lime, Strain Gage, Photography, Bio medical, Marine Sciences, Aero-Space, Electronic, Pulp and Paper, Shock and Vibration Testing, Feedback Control, Computers and Data Handling and Computation. There will be an education workshop which includes a session entitled "Is In strumentation a Professional Field?" (Wednesday morning and afternoon). Other sessions include Institute of Man agement Sciences, Instrument Manu facturers, Precision Measurements As sociation, Institute of Radio Engineers, and the Committee on Standards Labo ratories. Copies of the program and other de tails are available from IAS, Penn Sheraton Hotel, Pittsburgh 19, Pa.
new
c o n c e p t s in s c i e n t i f i c
Delmar
introduces
MITE-O-WARE GREASE FREE MICRO-GLASS LAB WARE * * * * * *
N e w u n i q u e j o i n t s are l e a k p r o o f O-Rings m a d e of V i t o n Eliminates c o n t a m i n a t i o n Fast e a s y a s s e m b l y . . . n o j o i n t s t o g r e a s e V i t o n O-Rings h o l d pressures as l o w a s 10"*, for temperatures from — 4 0 ° F to + 5 0 0 ° F. N e w d e s i g n f o r O - R i n g needle v a l v e stop cocks
See the new Mite-O-Ware laboratory ware and Delmar's Portable High Vacuum glass ware at the Chem Show September 5 thru 8th, Booth 312, at the International Amphitheatre, Chicago.
Delmar
SCIENTIFIC LABORATORIES
317 MADISON ST., MAYWOOD, ILL. A SUBSIDIARY OF COLEMAN
Write for new Mite-O-Ware catalog A61M on MicroGlass lab ware and Catalog A60D for High Vacuum glass ware equipment. INSTRUMENTS,
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Circle No. 68 on Readers' Service Card
Gas Chromatography Nomenclature Following publication of papers on the nomenclature of gas chromatog raphy [Ambrose, D., Keulemans, A. I. M., and Purnell, J. H., Anal. Chem. 30 (1958) 1582, and Johnson, H. W., and Stross, F. H., Anal. Chem. 30 (1958) 1586], a special group was formed under the auspices of the Section of Analyti cal Chemistry of the International Union of Pure and Applied Chemistry to draw up Recommendations for a Standard Terminology. The Prelimi nary Recommendations made by the Group were approved by the Commit tee of the Analytical Section in 1959 and have been published [Pure and Applied Chemistry 1, (1960), 177, and Gas Chromatography 1960 (ed. R. P. W. Scott), Butterworths, London, 1960, p. 423]. As a result of comments made about the Preliminary Recommendations it is proposed that amendments should be submitted to I.U.P.A.C. on the follow ing two points : (1) In the section on apparatus per formance, an equation (equation 12) is given which relates the resolution ob tained to the number of theoretical plates in a column. This equation is only valid when the gas hold-up is negligible compared with the retention volume, a condition which is not ful-
glassware
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Circle No. 59onReaders' Service Card VOL. 33, NO. 10, SEPTEMBER 1961
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