PRECISION Ideserve N Squality T Rreagents UMENTS we now proclaim. Back in the old days, when there weren't many catalogs of laboratory organics, we loaded ours with "colorimetric" reagents. First the colorimeter had replaced the eye of a good m a n , then spectrophotometry came along and ex panded the old "colorimetry." Whether or not a reagent you seek is supposed to give a color signal when it reacts, the Eastman catalog is still the first place to look for it. The Eastman list is also the first place to look for spectrophotometric aids, particularly if you are a little ahead of less ambitious workers, who are n o t yet buying the item you seek in a volume to interest less ambitious producers than Eastman. Case in point: 3-Aminophthalimide (EASTMAN 10705), 4-Dimethylamino-4'nitrostilbene (EASTMAN 10702), and N,N-Dimethyl-m-nitroaniline (EASTMAN
1208), fluorescent compounds for a relatively inexpensive method of calibrating a spectrofluorometer, described in Anal. Chem. 5(5:368 ( 1964). Since you turn to Eastman for the less common items needed in spectro photometry, Eastman is also the right label for the more common ones like spectro-grade solvents. Why, after all? Convenience in ordering m a y be a sufficient reason, b u t there is a more subtle one that a working chemist grasps more quickly than other mortals. Eastman, as you m a y have heard, produces solvents n o t only for o u r own laboratories but for uses far beyond the laboratory. This provides inside in formation on what can get into them that ought to come out before offering them t o any chemist for spectrophotometric use. Internal complaints are likely to be heard and acted upon before customers have reason to complain. • So the useful IR windows tend to open wider, and the UV cutoffs creep lower, and we usually don't bother to mention it. Of course, all EASTMAN Spectro Grade Solvents must pass our published UV and IR specs. Not just the one. Not just the other. Both. • Water in the Acetonitrile (EASTMAN S488) keeps going down year to year. • A small percentage of the molecules in a bottle of Bromoform (EASTMAN S45) had a chlorine atom on them. We now know why and how to keep that percentage much lower. • Methyl Formate (EASTMAN S1227) no longer has a discernible OH band. This story could go o n a n d on. A n d it does. Free brochure " E A S T M A N Spectro Solvents" charts all we formally claim about all the ones we offer—all the familiar ones plus Bromotrichloromethane (EASTMAN S 5 9 9 5 ) , Decahydronaphthalene ( E A S T M A N S I 9 0 5 ) , Dodecane ( E A S T M A N S 2 5 5 6 ) , 2-Methoxyethanol ( E A S T M A N S 2 3 8 1 ) , and Trifluoroethanol ( E A S T M A N S 8 8 9 0 ) .
Aid for reflection spectrophotometry: E A S T M A N White Reflectance Paint (based on B a S 0 4 ) is whiter, a better diffuser, a n d keeps those properties m u c h longer than the familiar M g O smoke. Apply as spray. Send for data.
EASTMAN KODAK COMPANY Eastman Organic Chemicals Rochester, Ν . Υ . 14650
Kodak
New Books
included. In general, the treatment of detail is more extensive than usual only if either or both of these condi tions are met: (1) the subject has sig nificant bearing on other major branches of chemistry including im portant industrial processes; (2) the topic is commonly misunderstood or found to be confusing. The relevance of organometallic chemistry to industry has been indicated and the scale of manufacture of some of the major in dustrial organometallics (lead anti knocks, silicones, and aluminum alky Is) has been emphasized. The book con cludes with a short chapter on catalysis. Silylation of Organic Compounds. Alan E. Pierce, xiii + 487 pages Pierce Chemical Co., P. O. Box 117, Rockford, III. 61105. 1968. $18.50
The application of silylation in the area of gas-phase analysis is given comprehensive treatment and should be of interest to both synthetic and analytical chemists. The book is in tended to provide a review of the liter ature (to July 1968) and a manual of procedure. The factors affecting the use of trimethylsilyl compounds in gas chromatography and mass spectrom etry are discussed, but a thorough de scription of these analytical techniques is beyond the scope of this book. Auxil iary information on the properties and chemistry of silylated organic com pounds is included. There are 14 chap ters, a bibliography, a glossary, and an index. Noble-Gas Chemistry. John H. Holloway, viii -f- 213 pages. Barnes & Noble, Inc., 105 Fifth Ave., New York, Ν. Υ. 10003. 1968. $6.75
This book, which is divided into three parts, is intended to serve as a review (through 1967) of the known chemistry of the noble gases. Part 1 describes briefly the discovery and properties of the noble gases and re views early attempts to induce mem bers of the family to react; special emphasis is placed on the chemistry involved. Part 2 is concerned essen tially with the preparation and reac tions of clathrates and short-lived spe cies observed spectroscopically. The advances since 1962 in the chemistry of xenon, krypton, and radon are cov ered in Part 3. A full list of references is provided, but it is not intended to be complete. The author has attempted to show which data are the most re liable—namely, which are the preferred preparative methods and the preferred values among the physical data. VOL. 4 1 , NO. 6, MAY 1969 ·
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