E. Merk A.G

also included packaging and price informa- tion for each ... Galaxy Blvd.·, Rexdale (Toronto), Ontario. _ ... Spectroscopic Studies of 1, 3-Dimethylb...
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Nonionic Surfactants Suppressors

W. U.

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Polarographic Maximum

Malik and P. Chand

Direct Spectrophotometric Simultaneous Determination of Nitrite and Nitrate in the Ultraviolet

J. H. Wetters and K. L. Uglum

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Spectropolarimetric Determinations of the Lanthanide Metals with D-(-)-,2-Propylenediaminetetraacetic Acid

D. L. Caldwell, P. E. Reinbold, and K. H. Pearson

Precipitation during Electromigration of Ions

J. Deman

Effect of Potassium on Analysis of Tin by Atomic Absorption Spectrophotometry

J. R. Levine, S. G. Moore, and S. L. Levine

Computer Analysis of Unresolved Non-Gaussian

Gas Chromatograms by Curve-Fitting A. H. Anderson, T. C. Gibb, and A. B. Littlewood

Application of a Liquid Helium Cryostat in Neutron Activation Analysis of Fluids D. Bruñe and H. Wenzl

Gas Chromatographic and Nuclear Magnetic Resonance Spectroscopic Studies of 1, 3-Dimethylbarbiturates

Obtained by Various Methylation Techniques G. A. Neville A Bipolar Pulse Technique for Fast

Conductance Measurements D. E. Johnson and C. G. Enke

Computer Techniques for the Quantitative High Resolution Mass Spectral Analysis of Complex Hydrocarbon Mixtures T. Aczel, D. E. Allan, J. H. Harding, and E. A.

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Analytical Applications of X-Ray Excited Optical Fluorescence Spectra. Direct Determination of Fractional Parts Per Million Amounts of Rare Earths in Thorium T. R. Saranathan, V. A. Fassél, and E. L. DeKa/b

Quantitative Thin-Layer Chromatography Using a Flame Ionization Detector J. J. Szakasits, P. V. Peurifoy, and L. A. Woods

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chemical and structural formula, and various technical data such as melting range, specific rotation and extinction, loss on drying and sulfate ash. To make this catalog really complete, we’ve also included packaging and price information for each compound—just in case you’d like to order. For your free copy, write: EM-

Computerized Searching of Inverted Files F. E. Lytle

Homogenized Fission Track Analysis of Uranium in Whole Rock Geological Samples D. E. Fisher

Reagents Division, Brinkmann Instruments,

Cantiague Road, Westbury, N.Y. 11590. In Canada, write.· Brinkmann Instruments (Canada) Ltd., 50 Galaxy Blvd.·, Rexdale (Toronto), Ontario. _

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Coulometric Titration of Acid Hydrazides with Pressuremetric End Point Detection D. J. Curran and J. E. Curley

Absorptiometric Determination of Hydrogen Peroxide in Submicrogram Amounts with Leuco Crystal Violet and Peroxidase as Catalyst . A. Motto

Circle No. 56 on Readers1 Service Card

196 A

ANALYTICAL CHEMISTRY, VOL. 42, NO. 2, FEBRUARY 1970

la, B. E.

Simpson, and G. Gorin