NEW BOOKS Thin
Film
Chromatography.
E.
Vernon Truter. xi + 205 pages. Interscience Publishers, Inc., 60S Third Ave.. New York 16, Ν. Υ. 1963. $7.00.
Reviewed by Β. Ζ. Senkowski, As sistant to the Director of Products Control, Hoffmann-La Roche, Inc., Nutley 10, N. J.
The general acceptance and wide spread use of "Thin Film Chromatog raphy" is evidenced by the increasing number of publications utilizing this method. The more universally ac cepted term for this procedure appears to be thin layer chromatography. For the sake of uniform nomenclature, it would appear advantageous to stand ardize in favor of the term thin layer chromatography. Truter's book, in English, contains
Actual laboratory application showing Sargent Con stant Rate Burette with Magnetic Stirrer, pH RE CORDING ADAPTER, and Model SR Recorder.
For Recording pH
SARGENT pH RECORDING ADAPTER OFFERS HIGH SENSITIVITY
FLEXIBILITY
1 millivolt per pH unit
Output adjustable to give full scale recorder deflection for 1 to 14 pH
EXCELLENT STABILITY Drift less than 0.01 pH/hour
• LOW COST
Extreme resistance in electrode or solution is completely compatible with Sargent or other high quality potentiometric recorders through this new instrument, which transmits potential without distortion but converts impedance to lower values. An electrometer circuit—stable, linear and of high resistance—provides smooth, non-interrupted conversion with output at maximum sensitivity approxi mately 1 millivolt per pH unit. Adjustable sensitivity and variable displacement give flexibility in setting pH range of the recorder. Accommodates standard commercial glass and reference electrodes. For pH titration, the Sargent Constant Rate Burettes, which may be synchron ously driven from Sargent Recorders, are useful adjuncts. S-72172pH ADAPTER-Sargent Recorder. Without electrodes $170.00 Designed and Manufactured by E. H. Sargent & Co. Write for Bulletin RA
®
SARGENT
Circle No. 90 on Readers' Service Card
.
ANALYTICAL CHEMISTRY
Infrared Spectra of Inorganic and Coordination Compounds. Kazuo
Na.lca.moto. xii + 328 pages. John Wiley &· Sons. Inc.. 440 Park Ave., South. New York 16. Ν. Υ. 1963. $9.00.
Ε.Η. SARGENT & CO.,4647 W.FOSTER AVE.,CHICAGO 30,ILL Detroit 4, Mich. · Dallas 35, Texas · Birmingham 4, Ala. * Springfield, New Jersey * A n a h e i m , Calif.
SARGENT SCIENTIFIC LABORATORY INSTRUMENTS-APPARATUS-SUPPLIES-CHEMICALS
56 A
205 pages and serves as a general sur vey of the equipment and operational techniques on this timely subject. Part I (57 pages) deals with every phase of thin layer chromatography from the clean glass plate through the recording of the chromatogram. The factors which influence the mobility of the sample on the plate are lightly dis cussed, such as adsorbents, application, development sample size, detection, and reproducibility of the Rf values. The author states that the optimum sample load to be applied to a plate should be about 10 ^g. or less. This is in many cases an impractical limitation when studies concerning purity are carried out. Part II (64 pages) deals with Special Techniques and describes the different procedures used in de veloping a chromatogram, pH effects, and normal and reversed phase parti tioning in thin layer chromatography. Brief mention is made of ionophoresis as applied to thin layer chromatog raphy. Under Identification, the au thor discusses the use of functional group reactions on the chromatoplate and chromatography of derivatives to help characterize an unknown sample. This section (10 pages) is very well written and would be helpful to anyone working in this area. An adequate treatment of the quantitative evalua tion of chromatographed samples is presented. In the reviewer's estimation, some of the repetition that exists in Part I and Part II regarding development and detection could have been eliminated through consolidation of the related information. Part III (81 pages) de scribes application of thin layer chro matography and contains a section on the Pesolution of Groups of Related Compounds (51 pages). This latter topic is particularly well organized and contains a number of the important contributions that have appeared in the literature such as the work on medicinal compounds, alkaloids, and amino acids. The book lists 282 references includ ing a number that appeared in 1962. Many of the journals are not readily accessible to the average laboratory. This concise volume is recommended (o those who wish to introduce thin layer chromatography to their work.
Reviewed by Stephen E. Wiberley, Department of Chemistry, Rensselaer Polytechnic Institute, Troy, Ν. Υ.
