ANALYZE WITH CONFIDENCE! IMPURITIES REPORTED IN...
ppm
Total impurities GUARANTEED not to exceed 6 ppm in SPECTROSCOPIC PRODUCTS THIS proven "first" by National Carbon Company offers you a new high in accuracy, through quantitative reporting of impurities. All shipments of "National" high-purity spectroscopic electrodes, preforms, and pow ders include a "statement of purity"—listing in ppm the maximum extent to which a given trace element is present—the total impurities "National" and "Union C a r b i d e " a r e registered t r a d e - m a r k s f o r p r o d u c t s of
guaranteed not to exceed 6 ppm. Thus, the spectroscopist can approach the most critical analytical work with confidence that his re sults will not be affected by elements present in indefinite concentrations. When you analyze with "National" spectro scopic products, you are working with consist ently high-purity levels.
NATIONAL CARBON COMPANY Division of Union C a r b i d e C o r p o r a t i o n , 2 7 0 P a r k A v e n u e , N e w Y o r k 17, Ν. Υ .
UNION CARBIDE
IN C A N A D A : U n i o n C a r b i d e C a n a d a L i m i t e d , T o r o n t o Circle No. 152 on Readers' Service Card VOL.
34, NO. 3, MARCH 1962
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