NEW PRODUCTS
Pure (99+#r
FATTY ACID . Standards A • UNUSUAL Odd Carbon Polyunsaturates Alpha-hydroxy Cis and Trans Isomers
• COMMON Saturates Unsaturates Methyl, Ethyl, Butyl Esters
• ACIDS
Interchangeable grinding elements are made of porcelain, agate, steel, sintered aluminum, and tungsten carbide. Schuco Scientific. 421
Unit determines oxygen concentra tions on the basis of high paramagnetic susceptibility of the gas. The instru ment is available in the filament or annulus type, in which the analyzer units are interchangeable and comple mentary. The annulus type is recom mended especially for estimations where more than 1% hydrogen or helium is present, or where a higher response speed is desirable. The company says that it is affected by carbon dioxide, however, and must be level when used. The filament type detector, on the other hand, is relatively insensitive to carbon dioxide and is more suited to conditions associated with change of level. Minimum ranges are 0 to 8% or 0 to 2% oxygen full scale, depend ing on the type of indicator or recorder used. Cambridge Instrument Co. 4 2 2
• ESTERS • QUANTITATIVE MIXTURES • TRIGLYCERIDES ^ PARTIAL LISTING
A l l m a t e r i a l s analyzed prior to shipment. Copies of original vapor phase c h r o m a t o g r a m s can be supplied.
Low temperature utility cabinets, called the Deltair Templo line, are available in 5- and 13-cu. ft. capaci ties, with five temperature ranges to — 120° F. Instrument panel includes built-in adjustable indicating con troller, pilot lights, and selector switches. Optional features are available. Deltair Products. 423 Hydrogen Generator
Catalog and GAS-CHROM NEWSLETTER available on re quest.
APPLIED
SCIENCE
LABORATORIES, INC. Box 1 4 0 , State College, P a . Phone A D a m s 8 - 2 4 0 6 Circle No. 19 on Readers' Service Card 130 A
•
ANALYTICAL CHEMISTRY
MECHROLAB 301 OSMOMETER
Molecular Weight Determination to 20,0G The M e c h r o l a b 301 O s m o m e t i offers t h e research and industri laboratory" a fast, accurate and co: venient i n s t r u m e n t for t h e measur m e n t of osmotic concentrations, operates by measuring temperatui differences, caused by differenti mass transfer, between a samp drop of t e s t solution and a referem drop of pure solvent. FAST—CONVENIENT. A uniqi method of applying t h e sample ' t h e t h e r m i s t o r bead permits mea urements on a new sample aboi every two minutes.
for C H R O M A T O G R A P H Y
99+% 99 f % 99 f %
CURTIN...
Magnetic Oxygen Meters
• ALCOHOLS
Methyl Cerotate Methyl Palmitelaidare Methyl Isomyristate
from
Aerograph Model 650 is designed to supply the hydrogen and air necessary for operation of flame ionization de tectors. The hydrogen is generated by electrolysis, and an adjustable flow rate of 10 to 40 ml. per minute is read di rectly on a large meter. Filtered air at 300 ml. per minute is supplied by a small vibratory pump. The unit is said to require no attention other than refilling with distilled water twice each month. Wilkens Instrument and Re search, Inc. 424
ACCURATE. Matched t h e r m i s t o r a simple d-c bridge circuit and a nu indicator permit m e a s u r e m e n t c t e m p e r a t u r e differences of t h e orde of 0.01° C with an accuracy of 1 ^ With organic solutes in benzen molecular weights up to 5000 can b measured with 1% accuracy. T e m p e r a t u r e of t h e thermistc environment is controlled to bettc t h a n ± 0 . 0 0 1 ° C. The Model 30 Osmometer is designed for cor venient bench top use. Catalog No. 16830
Each 1850.0
F o r complete information writ W. H. Curtin and Company, P . C Box 118, Houston 1, Texas.
W.H. CURTIN & LABORATORY APPARATUS, FURNITURE & CHEMICALS
CURTIN
HOUSTON '. *.
DALLAS · CURTW
·
TUi SA .
BIRWINGH4M -
JACKSONVILLE OF ME1ICO
·
SA
NEW ORLfANS
ATLANTA . DE C. ¥
·
MIAMI
CORPUS CHR1STI MiilCO
Ο f
1 34
Circle No. 45 on Readers' Service Card
