EDITOR'S COLUMN Paris has made substantial contributions to analytical chemical research in the field of medicine and food. Prof. Gautier, head of this organization, correlated and coordinated methods used in these types of analysis and developed reagents and methods. The Centre d' Etudes et R e cherches des Charbonnages de France has done considerable work in the analysis of coal and coke, tars and derivatives, petroleum, and silica dust. The Centre National d'Etudes et Recherches Céramique, has concentrated on improving analytical methods for ceramic materials, particularly silicates, through use of both chemical and physieochemical means. The I n s t i t u t de Recherches de la Sidérurgie works in three major areas: rapid methods for steel analysis, for example, emission spectrography ; analyses of the finished products using both spectrographic and classical chemical methods; and metallurgical research. T h e I n s t i t u t des Corps Gras has a wide variety of research programs for the analysis of fats. Included are trace determination of iron using colorimetric methods, inverted phase division chromatography for oxidized fats, column chromatography for glycerides in oils, methods for determining urease in soybean oil, and gas chromatography for the volatile constituents in extracted oils. The Institut Française de Caoutchouc centers its research on determination of mineral contents of vegetable fibers. N a t u r a l rubber is an area of major interest. One project, physiological diagnosis, consists of determining the major and trace mineral needs of hevea (rubber) plants through analyses of thousands of samples. This helps determine mineral fertilizer requirements. Proper fertilization, in turn, has led to more productive rubber trees.
Only $1750! Over $500 less t h a n its closest competitor! B u t don't let its low cost fool you. In colleges all over the country it's a busy teaching tool, with overtime use in faculty research projects. In industry, it's a basic tool of quality control and new product development.
Bausch & Lomb 1.5 METER STIGMATIC GRATING Spectrograph
Bausch & Lomb DUALGRATING Spectrograph H e r e ' s the equivalent of two spectrog r a p h s in one! Now you can photograph two different spectral regions . . . in just one exposure . . . on a single 4" χ 10" plate or two 2" χ 10" plates. Highest dispersion and resolu tion, for critical edge-to-edge study. So efficient, it reduces h o u r s of analysis to minutes!
How much spectrograph do you really need ? Depends on your work. T h e more critical, the more you need the high dispersion and resolution of the Dual-Grating. But in more routine use, the simplicity and low cost of the 1.5 Meter make it a popular choice. And there are widely overlapping areas of quality control, education and research in which only your future needs can determine which you should choose. In short, the answer depends on thorough knowledge of your analytical problems and objectives. We'll be glad to survey your requirements—in complete confidence—and recommend the right equipment for your present and future needs. J u s t call us in for con sultation at your conven ience. No obligation, of BAUSCH & LOMB INCORPORATED course. 8 1 0 2 0 Bausch Street, Rochester 2, Ν. Υ. •
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Please schedule a consultation at my con venience with no obligation to me. Π Please send Spectrograph Catalog D-277. NAME,
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VOL. 33, NO. 9, AUGUST 1961 · 8 3 A
