Seismograph Service Corporation - Analytical Chemistry (ACS

May 23, 2012 - Seismograph Service Corporation. Anal. Chem. , 1969, 41 (12), pp 126A–126A. DOI: 10.1021/ac60281a823. Publication Date: October 1969...
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NUMEC is the exclusive distributing and servicing organization in the U. S. for the Carlo Erba line • Elemental Analyzer—for the automatic analysis of CHN or O. • Porosimeter—for the automatic deter­ mination of pore radius from 37.5 to 75,000 . • Sorptomatic—an automatic BET instru­ ment for surface area measurement and pore size distribution.

NUMEC® Instruments Department 609 North Warren Avenue Apollo, PA 15613 Phone: 412-567-6736 Circle No. 164 on Readers' Service Card

The beginning of a SEISCOR sampling valve...

. . . the end of your chro­ matographic sampling problems. Through precision design and construction, Seiscor diaphragm -type sampling valves a s s u r e fast re­ sponse, long life, repeat­ ability and the plus of flexible specifications to meet your temperature and p r e s s u r e require­ ments. Contact Seiscor Division of Seismograph Service Corporation, P. O. Box 1590, Tulsa, Oklahoma 74102.

Glassware apparatus for determining the concentration of various gases con­ sists of three chambers for holding the absorbing gases; one chamber intro­ duces and holds gas, the second and third absorb oxygen and carbon dioxide, respectively. This system was de­ veloped by Scholander; carefully mea­ sured volumes give direct answers. The assembly uses only 0.5 ml of sample gas; accuracy is then 0 . 0 2 % ; analysis time ranges from 5 to 8 min. The Micro-Scholander includes a constant temperature water bath, motor-driven stirrer, and a spirit level. Instrumenta­ tion Associates, Inc., 17 W. 60th St., New York, Ν. Υ. 10023 409

Tissue Culture Hood An improved tissue culture hood has an ultraviolet-proof sash to prevent un­ desirable effects of exposure of materi­ als to UV. The new design uses bi-fold doors which allow four positions, in­ cluding those fully closed for TJV steril­ ization, and fully open for decontami­ nation. Labconco Corp., 8811 Pros­ pect St., Kansas City, Mo. 64132 4 1 0

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Visit us in Booth 940 at the Houston ISA Show Circle No. 67 on Readers' Service Card

126 A • ANALYTICAL CHEMISTRY

COMPANY

Beryllium Oxide Laboratoryware Ultrapure beryllium oxide laborato­ ryware for use up to 2000 °C includes ceramic crucibles, trays, tubes, thermo­ couple insulators, and custom-formed units made of up to 99.99% BeO. Ex­ tremely corrosive acids, bases, and salts can be reacted in Berlox crucibles for high-purity chemical processing. Na­ tional Beryllia Corp., Greenwood Ave., Haskell, N. J. 07420 411