V O L U M E 2 4, NO. 8, A U G U S T
UNSUAL
1952
7A
APPLICATIONS OF SPECTROGRAPHIC ANALYSIS...
MATERIAL IDENTIFICATION and
QUANTITATIVE ANALYSIS BY S-P Uses of the spectrograph by Southern Pacific Com pany offer striking evidence of the method's speed, accuracy and versatility for both qualitative and quantitative determinations.
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 φ Provides a permanent record φ Differentiates between two ele ments chemically very similar • Analysis can be made in some cases without destroying sample The term "National" is a registered trade-rnark of Union Carbide and Carbon Corporation NATIONAL CARBON COMPANY A Division of Union Carbide and Carbon Corporation
30 East 42 nd Street, New York 17, Ν. Υ. District Sales Offices: Atlanta, Chicago, Dallas, Kansas City, New York, Pittsburgh, San Francisco in Canada : National Carbon Limited, Montreal, Toronto, Winnipeg
In their Sacramento General Laboratory, S-P uses spectrography for a quick double-check of the specifi cations on nearly a score of such purchased items as welding rods; chrome and moly alloys and tool steels; solders and other non-ferrous metal ingots. Qualitatively, the spectroscope identifies the material in diesel parts r e q u i r i n g replacement or repair and u n k n o w n steels from Tool R o o m Treating. Special analyses have yielded valuable information on a diversity of S-P items, including band saws to be welded; tank car sediment; residues from ice machines and alcohol heaters; additive oils, greases, paints and pigments.
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HAVE YOU A JOB FOR THE SPECTROGRAPH? Spectrography will identify and quantify any element within the range of emission-type spectra much faster than any other method of comparable accuracy. BE SURE OF ELECTRODE PURITY: specify "National" electrodes — the purest obtainable accompanied by a statement of purity which enables your analyst to allow fully for traceelement spectra.
