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
.
3 A
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
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