NEW BOOKS
oxide, oxidants, acrolein, formaldehyde, and nitrate in air are presented. Sam pling techniques, apparatus, proce dures, calculations, and references to the original literature are given for each method. Spectrochemical Analysis of Tung sten. R. I. 6 6 3 2 . R. C. Gabier,
Jr., and M. J. Peterson. Jfi pages. Publications Distribution Section, Bureau of Mines, U.S. Department of the Interior, 4800 Forbes Ave., Pittsburgh, Pa. 15213. Free of charge. Several methods for the direct spec trochemical determination of impurities at the parts-per-million level in tung sten metal and oxide were studied and modified in order to improve the accu racy and precision, and to define the lower concentration levels of detectability for the common impurities in tung sten. The details and results of these investigations are presented in this monograph. A Semiquantitative Spectrochemical Method for Analysis of Coal Ash. R.I. 6496. M.J. Peterson and J. Β. Zink. IS pages. Publications Dis tribution Section, Bureau of Mines,
U. S. Department of the Interior, 4800 Forbes Ave., Pittsburgh, Pa. 15213. Free of charge. A semiquantitative, spectrochemical method involving low-temperature ash ing was developed, providing for the es timation of 68 elements in coal ash. Excitation was achieved with a d-c arc, spectra were recorded photographically, and interpretation was made by \dsual comparison with standard samples. The following publications can be ob tained from the Superintendent of Doc uments, U. S. Government Printing Office, Washington, D. C. 20402, or from local U. S. Department of Com merce Field Offices. Radiochemical Analysis: Activation Analysis, Instrumentation, Radia tion Techniques, and Radioisotope Techniques, July 1964 to June
This technical note is the annual pro gress report for the Radiochemical Analysis Section of the National Bu reau of Standards. Included in the presentation is a section on facilities, in which are described a nuclear reactor,
This method, a modification of the combust ion-conduct omet ric technique, permits complete combustion of sam ples weighing up to 1.5 grams, with a sensitivity of 25 p.p.m. and a precision of 5 p.p.m.
A reliable reference signal enables t h e operator to e a s i l y t e s t t h e w o r k i n g of t h e e n t i r e G / C a n d recorder f u n c t i o n with no detailed electrical k n o w l e d g e n e c e s sary. Establishes instru m e n t standards which can b e r e f e r r e d t o s h o u l d per f o r m a n c e of t h e e q u i p m e n t b e in d o u b t or as a c o m p a r i s o n for a r e p a i r e d u n i t .
R H O - L O C K G / C T E S T S E T , FOR U S E W I T H F L A M E I O N I Z A T I O N , THERMAL CONDUCTIVITY AND THERMISTOR DETECTORS, c o m p l e t e w i t h l e a t h e r c a r r y i n g c a s e , s e l e c t i o n of t e s t l e a d s a n d i n s t r u c t i o n s for u s e . $210.00
P.O. BOX L
Λ
R H O
P r e p a r a t i o n of S t a n d a r d Samples a n d Development of Analytical Techniques f o r C a r b o n a n d N i t r o g e n in H i g h P u r i t y B e r y l l i u m . 50
pages. Nuclear Metals Division of Textron, Inc., West Concord, Mass. for the Air Force. October 1965. Order AD-626 987. $2.
A new and u n i q u e test set for effectively localizing malfunctions in electrom eters, detectors, gas s u p p l y , recorders, and col umns. Pinpoints specific c a u s e s of e x c e s s i v e n o i s e , lack of s i g n a l , i n s t a b i l i t y , h u n t i n g of r e c o r d e r t r a c e , round top p e a k s , recorder dead spots, etc.
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The following publications can be ob tained from the Clearinghouse for Fed eral Scientific and Technical Informa tion, U. S. Department of Commerce, Springfield, Va. 22151.
Technical Note 276. 155 pages. January
1965. NBS J. R. DeVoe. 1966. $1.
RHO-LOCK GAS CHROMATOGRAPH TEST SET
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linear electron accelerator, digital com puter, and basic equipment. The principles of operation, descrip tion of circuitry, and applications of electronic equipment designed for the automatic handling of data produced in activation analysis and Mossbauer spectrometry are presented together with detailed sections on activation analysis and Mossbauer spectrometry.
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