High Performance Liquid Chromatography on - ACS Publications

Gas Chromatograph-Mass. Spectrometer Interface. W. D. Dencker, D. R. Rushneck, and G. R. Shoemake. 1753. Plasma Chromatography of the .... will not be...
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Contributed Articles High Performance Liquid Chromatography on Small Par­ ticle Silica Gel. R. E. Majors Influence of Column Configuration on Performance in High Efficiency Liquid Chromatography. Howard B a r t h , Erwin Dallmeier, a n d B. L. Karger Characterization of Exponentially Modified Peaks in Chromatography. Eli Grushka

1722

172G

Ultrasonic Nebulization in a Low-Emission Flame for Atomic Fluorescence Spectrometry. M. B. Denton and H. V. M a l m s t a d t

1813

Atomic Absorption Determination of C a d m i u m and Lead in Whole Blood by a Reagent-Free Method. T. R. Hauser, T. A. Hinners, a n d J . L. K e n t

1819

Colorimetric Determination of Calcium Using Reagents of the Glyoxal Bis(2-Hydroxyanil) Class. C. W. Milligan a n d Frederick L i n d s t r o m

1822

Quantitative Sampling f r o m a Vertical Tube Reactor. W. Williams a n d W. L. S t u m p f , Jr.

1829

Gaussian

Separation and Quantitative Determination of the Y t t r i u m Group Lanthanides by Gas-Liquid Chroma­ tography. C. A. B u r g e t t a n d J . S . Fritz

1733

1738

Exact T r e a t m e n t of Diffusion in Gas Chromatography. H. A. H a r t u n g a n d R. W. Dwyer

1743

Support-Bonded Polyaromatic Copolymer Stationary Phases for Use in Gas Chromatography. Ε. Ν. Fuller

1747

Electrochemical Cell as a Gas Chromatograph-Mass Spectrometer Interface. W. D. Dencker, D. R. R u s h n e c k , a n d G. R . S h o e m a k e

F.

Critical Evaluation of the Karl Fischer Water Method, End-Point Detection System, and Standardization. T. H. Beasley, Sr., H. W. Zeigler, R. L. Charles, and a n d Perry King 1833 Isothermal Decomposition of Isothiocyanatopentammine Cobalt(lll) Perchlorate—Particle Size Effect. C. JJ.. Chou and a n d F. A. Olson 1841

1753

Plasma Chromatography of the Mono-Halogenated Ben­ zenes. W. F. Karasek a n d 0 . S. T a t o n e

1758

Determination of Nanogram Quantities of Simple and Complex Cyanides in Water. P. D. Goulden, G o u l d e n , B. Β. Κ. K. Afghan, A f g h a n , and a n d Peter Brooksbank Brooksbank 1845

Piezoelectric Detectors for Organophosphorus Com­ pounds and Pesticides. E. P. S c h e i d e a n d G. G. Guilbault

1764

Prototype Charts for Identifying Biaxial Phases. Frevel

Apparatus for Automated Gel Permeation Cleanup for Pesticide Residue Analysis. Applications to Fish Lipids.

R. C.Tindle and D.L. Stalling

1768

Response of a Calcium-Selective Electrode in Acid Solu­ tion. J o h n Bagg a n d Robert Vinen

1773

Successive Photometric Titration of Calcium and Mag­ nesium. H i s a k u n i Sato a n d Kozo M o m o k i

1778

Sampled-Data Approach to the Reduction of Uncompen­ sated Resistance Effects in Potentiostatic Experiments. Richard B e z m a n Experimental Evaluation of Cyclic Voltammetry Theory for Disproportionation Reactions. P. J . Kudirka a n d R. S. Nicholson

1781

1786

Structural Determination of Monosubstituted Alkylbenzenes by Proton Magnetic Resonance. O s a m u Y a m a m o t o , K i k u k o H a y a m i z u , K i y o h a r u S e k i n e , a n d Shiyi Funahira

1794

Rapid, Phase-Sensitive, Three-Electrode Alternating Current Polarography. A. M. B o n d a n d D. R. Canterford

1803

Determination of C h r o m i u m in Biological Materials by Atomic Absorption Spectrometry Using a Graphite Fur­ nace Atomizer. I. W. F. Davidson a n d W. L. Secrest

1808

L. K. 1850

Notes Chelation of Boric Acid with Nitropyrocatechols and the Photometric Determination of Boric Adid. E. J . Hakoila, J. J . Kankare, andTaisto Skarp · 1857 Precision and Detection Limits of C a d m i u m , Manganese, Cobalt, and Nickel in Sulfides by Electron Microprobe Analysis. R . H . H e i d e l

1860

Kinetic Study of the Initial Cyclization of Methyl-bis(dchloroethyl)amine Hydrochloride Using Chloride IonSelective Electrodes. A. M. Knevel and P. F. Kehr

1863

Detection of Nanogram Quantities of Hexachlorophene by Ultraviolet Liquid Chromatography. P. J . Porcaro a n d Peter S h u b i a k

1865

H a m m i n g Type Codes Applied to Learning Machine Daterminations of Molecular Formulas. F. E. Lytle

1867

Titrimetric Determination of Ionic and Coordinated Azide Ion by Oxidation with Excess Nitrite Ion in Acid Solution. W. R. Biggs a n d R.W. Gaver

1870

Estimation of Trace Amounts of Chrysotile Asbestos by X-Ray Diffraction. A. L. Rickards

1872

ANALYTICAL CHEMISTRY, VOL. 4 4 , NO. 1 1 , SEPTEMBER 1972

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Contributed Articles Gravimetric Analysis of Uranyl-Orthophosphate Mixtures. J. M. Schaekers 1873 Acidimétrie Titration of Heavy Metal Acetates. Mannens

M. G. 1876

Determination of Scandium by Precipitation with Benzoic Acid. M.H.Mullinand R. B. Hahn 1878

Rapid Atomic Absorption Determination of Silver and Copper by Sequential Atomization from a Graphite Rod. R. D. Reeves, C. J. Molnar, and J. D. Winefordner 1913 Molecular Design—Tetrachloroterephthaloyl Oligomers as Liquid Phases for Gas Chromatography. S. H. Langer 1915 Use of Large Overpotentials in Galvanostatic Measurements. F. H. Beyerlein and R. S. Nicholson 1917

Simultaneous Microestimation of Choline and Acetylcholine by Gas Chromatography. D. J. Jenden, R. A. Booth, and Margaret Roch 1879

Aids for Analytical Chemists

Reaction of Nitrosamine with Fluorinated Anhydrides and Pyridine to Form Electron Capturing Derivatives. J. B. Brooks, C.C. Alley, and Roy Jones 1881

A Geiger-Muller Counter Designed to Measure Reproducibility activities Retained on Resin Columns. M. Heurtebise and J. A. Lubkowitz 1918

Electrolytic Sample Preparation and Its Application to Atomic Absorption Rapid Determination of Magnesium in Cast Iron. A. H.Jones and W. D. France, Jr. 1884

AThermo-Barometer C. R. Reed

Determination of Trace Amounts of Selenium in Wastewaters by Carbon Rod Atomization. R. B. Baird, Soloukid Pourian, and S. M. Gabrielian 1887

1921

New, Simple Windowless Cell for Front-Surface Fluorometry. J. A. McHard and J. D. Winefordner 1922 Triac Switching Circuitry for Eliminating Interfering Transients in Digital Logic Automated Systems. E. S. Iracki, M. B. Denton, and H. V. Malmstadt 1924

Improved Gas Chromatographic Method for Field Measurement of Nitrous Oxide in Air and Water Using a 5A Molecular Sieve Trap. Jiirgen Hahn 1889

Technique for Chemical Ionization Operation of aCEC21110B Mass Spectrometer. T. J. Odiorne and D. M. Desiderio 1925

Principles of Hot Plate Chromatography. and Vjera Jamnicki

Variable-Ratio Stopped-Flow HarveyandW.O. Borcherdt

Srécko Turina 1892

Study of Cobalt(lll) Complexes by Atomic Absorption Spectrometry. Effect of Ligands and Distribution of Atomic Cobalt in the Flame. Kitao Fujiwara, Hiroki Haraguchi, and Keiichiro Fuwa 1895 Separation of Thorium from Lanthanum and Other Elements by Cation Exchange Chromatography at Elevated Temperatures. F. W. E. Strelowand A. J. Gricius 1898 Determination of Lanthanum in Cobalt-Base Alloys by X-Ray Fluorescence Spectrometry. F. J.Haftka 1900

Mixing

Device.

R.

A. 1926

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Detection Limits in Analysis of Metals in Biological Materials by Laser Microprobe Opical Emission Spectrometry. W. J. Treytl, J. B. Orenberg, K. W. Marich, A. J. Saffir, and David Glick 1903

Correspondence D e t e r m i n a t i o n of C h r o m a t o g r a p h i c R e s o l u t i o n f o r P e a k s of V a s t C o n c e n t r a t i o n D i f f e r e n c e s .

G. C. C a r l e

1905

C o m m e n t s o n S m o o t h i n g a n d D i f f e r e n t i a t i o n of D a t a b y Simplified Least S q u a r e Procedure.

Jean Steiner, Yves

Termonia, and Julius Deltour

"Trading troscopy.

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