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lop Mm U lilr and other laboratory applications . . . Choose the perfect compan ion instrument to your elec trophoresis equipment. Buchler offers you the right power supply at the right price.
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BUCHLER INSTRUMENTS DIV. NUCLEAR-CHICAGO CORP. A SUBSIDIARY OF G.D. | S E A R L E ~ | & CO
1327 SIXTEENTH ST., FORT LEE, N. J. 07024
Satmagan (saturation magnetization analyzer) is used to obtain quick magnetite analyses. A sample is first weighed in a gravitational field and then in a magnetic field sufficiently strong to cause magnetic saturation. The instrument gives the quotient of these weighings which is directly proportional to the weight percentage of the magnetite present. A determination takes about 30 sec
in the secondary metals and alloys industry, as well as a vital supplier of asbestos and other minerals and chemicals. Consequently, a wide variety of raw materials and inter mediate and final products require constant evaluation by analytical techniques and instrumental meth ods. Analytical research has been directed toward the development of new or improved chemical and instrumental techniques emphasiz ing both the trace and major con stituent levels to provide faster and more accurate means of evaluating these metals and related materials. Analytical assistance of a nonroutine nature is also furnished to the many production units of the com pany. These services often require the development of newer improved techniques. A substantial analyti cal research program is carried out to improve the long-range capabili ties of the analytical function and to accumulate new scientific infor mation in selected areas. Both the analytical research and the service requirements of the Central Research Laboratories are met by several analytical sections which include: • X-ray fluorescence, optical emis sion, X-ray diffractometry • Wet chemistry, atomic absorp tion, photometric methods, fluorometry • Gas analysis techniques by mass spectrometry, gas chromatogra phy, and fusion methods • Thermal analytical methods
Circle No. 37 on Readers' Service Card
96 A ·
ANALYTICAL CHEMISTRY, VOL. 42, NO. 12, OCTOBER 1970
• Infrared analysis • Electron microprobe and scan ning electron microscope. Each laboratory group divides its time between support and method development research as the needs dictate. During recent years atomic ab sorption spectrophotometry and Xray fluorescence techniques have been extensively developed to pro vide precise elemental analysis of a wide variety of metals and materi als associated with the nonferrous smelting and refining. The em phasis with atomic absorption has been on techniques to provide high accuracy for high percentage ele ments while the emphasis with Xray fluorescence has been the de velopment of special fusion tech niques to eliminate matrix effects enabling accurate analysis for the \vide variety of complex products. Novel techniques combined with mass spectrometry developed for the analysis of gases in copper and in combustion products assisted sig nificantly in the development of the ASARCO cathode melter which has been adopted by a majority of the copper refiners. From evaluation of ores, through smelting and refining intermediate products, to analysis of alloys, the analytical sections utilize a variety of skilled personnel and instrumen tation. As one might expect in a company whose production includes such a diversity of elements, variety is the key word describing the an alytical function.
