NEW CHEMICALS
GAS CHROMATOGRAPHY
Ultra-High Purity Aluminum Aluminum of a resistance ratio in excess of 10,000 is now available in multi-kilogram quantities, for use in high electrical conductivity applica tions, for cryogenic high field strength magnets, in thin film micro circuit con tacts, MOS devices, high Q capacitators, and in aluminum-silicon alloy bonding wire. It is marketed in ingot, fabricated rod, sheet and wire forms. Materials Research Corp., Orangeburg, Ν. Υ. 10962. 501
New Improved Silicone Rubber Septums
Nonaqueous Methoxides
Useable t o over 300°C Over 8 0 Injections per Septum Type
Diameter
Quantity
Cat. No.
Price
25 100 25 100
15422 15423 15432 15433
$ 9.00 22.00 9.00 22.00
25 100
15442 15443
$ 9.00 22.00
1
15414
$45.00
Sodium methoxide, CH 3 ONa, and lithium methoxide, CH 3 OLi, are avail able in O.liV solutions in benzenemethanol, for use in nonaqueous titra tions. They are packaged in pints, quarts, and gallons. Corco Chemical Corp., Tyburn Rd. and Cedar Lane, Fairless Hills, Pa. 19030 502
SEPTUM DISCS W-13
13 mm (Va")
W-9
9.5 mm (3/e")
SEPTUM PLUGS W-10
6 mm χ 8 mm
SEPTUM SHEET W
12 χ 12"
Complete Series of Di-acid Esters The di-acid esters of saturated ali phatic straight carbon acids, starting with C e through C 18 , of ethylene glycol and of diethylene glycol are now offered as a complete series of purified products for research and analytical standards. The esters are reported as 99.0% pure. Lachat Chemicals Inc., 20200 Ashland Ave., Chicago Heights, 111. 60411 503 New Product Prevents Clogging
No Spurious Peaks Longer Injection Life - Less Bleed
These new products were tested in F & M 5750 and BC 5000 at 300°C and were still useable after 80 injections. Sizes to f i t F & M , Microtek, Barber-Colman, Bendix Corp., Varian A e r o g r a p h , Warner-Chilcott, and Research Specialties.
Clogging of flame spectrophotometers can be prevented with Bîon KNa, an anionic surfactant based upon a quaternary ammonium salt used to make a working solution for diluting specimens in making sodium and potassium determinations. It is also useful for cleaning glassware to be used in flame photometry and for cleaning the capillary of the photometer. Pierce Chemical Co., P. O. Box 117, Rockford, 111. 61105 504 Cesium Chloride Upgraded
BLUE SO Y O U WILL K N O W THEY ARE NEW.
APPLIED SCIENCE Laboratories, Inc. P. O. Box 440
·
State College, Pa. 16801
West Coast Branch: 1 1 135 I n g l e w o o d A v e .
I n g l e w o o d , Calif 9 0 3 0 4
See ACS Laboratory Guide for All Products/Sales Office 138 A
·
Circle No. 27 on Readers' Service Card ANALYTICAL CHEMISTRY
Cesium chloride has been upgraded to a "Fisher Certified Reagent" with individual lot analyses, and a guaranteed assay of at least 99.9% as CsCl. In addition to its use for protein separation, this high-purity, versatile compound can be used as a catalyst, as a contrast medium in animal radiology, bronchography, and hesterosalpinography, and as an inhibitor of cell division and oxidative reactions for several types of bacteria. Fisher Scientific Co., 300 Fisher Bldg., Pittsburgh, Pa. 15219 505
