6 A
ANALYTICAL
UNUSUAL
APPLICATIONS
OF
SPECTROGRAPHIC
CHEMISTRY
ANALYSIS...
A PIONEERING TOOL IN ZINC DIE-CASTING • The complex casting in the circle above is the "business end" of a hand grenade. This vital part, k n o w n as a bouchon, is zinc d i e - c a s t in large quantities to meet the needs of o u r fighting forces. It's just one of hundreds of zinc die casting applications now handled routinely by the die casting industry, because of special research by T h e N e w Jersey Zinc Company. Use of the spectrograph made it possible to analyze zinc for purity with great speed and accuracy and greatly aided N e w Jersey Zinc in the pioneering development of the zinc alloys — based o n high purity zinc—now used exclusively by the die casting industry. As a result, zinc die castings are now accepted by all branches of industry and the armed services. They provide die casting users with the greatest number of desirable mechanical properties and casting characteristics at the lowest cost. T h e N e w Jersey Zinc Company uses N A T I O N A L CARBON electrodes in their spectrograph.
Why it pays
to use NATIONAL
spectroscopic
e l e c t r o d e s . N A T I O N A L CARBON'S spectroscopic electrodes
are the purest obtainable. Each shipment is accompanied by a "Statement of P u r i t y " which tells your analyst what trace elements are present in the electrodes. As a result, he can assess his plates, or film, very quickly and accurately without being confused by unexpected spectral lines.
OTHER ADVANTAGES OF SPECTROGRAPHIC ANALYSIS • Sensitive to 1/10,000,000 of a gram for some elements • Saves time in analysis • Detects unsuspected metals • Accurate testing is possible with very small sample • Provides a permanent record • Differentiates between two elements chemically very similar • Analysis can be made in some cases without destroying sample
The term "National'' is a registered trade-mark of NATIONAL CARBON COMPANY Division of Union Carbide and Carbon Corporation
30 East 42nd Street, New York 17, N . Y . District Sales Offices: Atlanta, Chicago, Dallas, Kansas City, New York, Pittsburgh, San Francisco
