US Government Publications - ACS Publications

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Books Recent Developments in Mass Spec­ trometry in Biochemistry and Medi­ cine, Vol. 2. Alberto Frigerio, Ed. x + 492 pages. Plenum Press, 227 W. 17th St., New York, N.Y. 10011. 1979. $45

The papers collected in this volume were presented at the 5th Internation­ al Symposium on Mass Spectrometry in Biochemistry and Medicine held at Rimini, Italy in J u n e 1978. T h e 35 chapters include determinations of drugs and drug metabolites, carcino­ gens, poisons, steroids, catechol­

amines, amino acids and prostaglan­ dins by mass spectrometry or gas chromatography/mass spectrometry. There are several chapters on respira­ tory mass spectrometry. Official Methods of Analysis of the AOAC, 13th Ed. 1038 pages. The As­ sociation of Official Analytical Chem­ ists, 1111 N. 19th St., Suite 210, Arling­ ton, Va. 22209. 1 9 8 0 . $ 7 8

T h e 13th edition contains methods of analysis for foods, drugs, cosmetics,

plants, feeds, fertilizers, hazardous substances, air, water, and many other products. Approximately 175 new methods have been added during the five-year period (1974-1978) since the 12th edition was issued. 83 methods have been deleted, replaced, or surplused.

U.S. Government Publications Order copies of the following PRE­ PAID at the price shown by SD Cat. No. from Superintendent of Docu­ ments, U.S. Government Printing Of­ fice, Washington, D.C. 20402. Foreign remittances must be in U.S. exchange and include an additional 25% of the publication price to cover mailing costs. 10th Materials Research Symposium on Characterization of High Tempera­ ture Vapors and Gases. SP 5 6 1 , Vol. 1 and 2. 1979. $20/set. SD Stock No. 003-003-02124-5

This report includes 65 papers pre­ sented at the 10th annual Materials Research Symposium held in Gaithersburg, Md., in September 1978, and an additional 12 papers. Re­ searchers concerned both with the basic properties of hot vapors and gases and the applied problems of the extremes of temperature, pressure and chemical activity should find these volumes of interest.

ReAquant Reagent System The ReAquant Reagent System rep­ resents a breakthrough in the titri— metric end-point determination of water (moisture) content. It consists of ReAquant Titrant and ReAquant Solvent. Used together, they offer distinct advantages over convention­ al Karl Fischer methods to analysts involved in the determination of "free" water for pharmaceutical, petro-chemical and industrial chem­ ical quality control.

• Excellent Correlation In blind studies under a variety of conditions, the ReAquant system has been found to correlate exceptional­ ly well with results obtained by con­ ventional titration.

Sample A Β C

ReAquant Solvent Is a methanolic solution containing some components of the titration system, and is used for the dissolu­ tion and dilution of samples.

ReAquant Titrant Contains methanol and iodine. The approximate titer, as stated on the label, is 3.5 mg of water per milliliter.

• No Odor Problem J. T. Baker ReAquant reagents are completely free of both pyridine and sulfur dioxide. Hence, no obnoxious or lasting odors are generated.

G Expanded Range The ReAquant technique, under stringent laboratory testing, has been used successfully to determine the water content of a variety of materials, even troublesome samples such as ketones.

ASTM Publications

Water Content, % W/V By ReAquant By KF Titration Titration 2.43 2.33 0.85 0.82 2.20 2.27

ΓΖ Sharp Endpoint A sharp, non-fleeting endpoint is re­ quired for precise moisture titrations. The ReAquant buffered system of t i ­ trant plus solvent fulfills this need both visually and electrometrically. Since sulfur dioxide is absent in ReAquant products, no yellow S 0 2 l " complex is formed, facilitating the recognition of the visual endpoint. ReAquant endpoints also hold well once reached, lasting at least 20 seconds.

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Π ReAquant Procedure Titration using the ReAquant method requires no special equipment adap­ tation or complicated procedures. An apparatus or assembly used with conventional Karl Fischer titrations is recommended. 'Baker Analyzed'* ReAquant Titrant and ReAquant Solvent are supplied in 1-liter and 2.5-liter sizes.

J.T.Baker

Rapid Reaction Time

Quality control analysts in the in­ dustrial and pharmaceutical fields will benefit by using ReAquant rea­ gents. The combination of stable t i ­ trant and complementary solvent with built-in buffering capacity af­ fords a rapid titration. This is a de­ sirable feature in multi-sample mois­ ture analysis.

CIRCLE 26 ON READER SERVICE

CHEMICALS J. T. Baker Chemical Co. Laboratory Products Phillipsburg, NJ 08865 (201)859-2151 CARD

434 A · ANALYTICAL CHEMISTRY, VOL. 52, NO. 3, MARCH 1980

The following are available from the American Society for Testing and Materials, 1916 Race St., Philadel­ phia, Pa 19103 (U.S.A., Canada, and Mexico, add 3% shipping charges. Other countries, add 5% ) . Part 41 of the Annual ASTM Standards 1979. 1108 pages. 1979. $38

P a r t 41 contains over 130 standards on test methods for nonmetals, statis­ tical methods, space simulation, parti­ cle size measurement, general labora­ tory apparatus, durability of nonmetallic materials, and metric practice. Part 12 of the Annual ASTM Standards 1979. 874 pages. 1979. $32

P a r t 12 contains over 80 standards on the chemical analysis of metals, and the sampling and analysis of metal-bearing ores. T h e new stan­ dards include practice for flame atom­ ic absorption analysis.