/U
.SMeiî
Contributed Articles Gas-Liquid Chromatographic Determination of AminoGlycoside Antibiotics: Kanamycin and Paromomycin. Kiyoshi Tsuji and J. H. Robertson
1661
Voltammetric Determination of Europium(lll) Using the Lantha num Hexaboride Electrode. D. J. Curran and K. S. Fletcher III
1663
Rapid Desorption of Chromium(lll) from Cation Ex changer with Hydrogen Peroxide Solutions. G. A. Sleater and D. H. Freeman
1666
Triethylenetetraminehexaacetlc Acid Titration Using Ion Selective Electrodes. E. A. Moya and K. L. Cheng
1669
Correspondence
Λ FREQUENCY TUNABLE LASER available off-the-shelf or in a system custom designed for you. Can you make use of a coherent radiation source where frequency, pulsing and scan rate are all con t i n u o u s l y c o n t r o l l a b l e and f u l l y monitored? If so —consider the new Chromabeam 370 Tunable Dye Laser.
Alkylation and Gas Chromatography of Aqueous Inor ganic Halides. Joseph MacGee and K. G. Allen
1672
Plastic Electrodes Specific for Organic Ions. Higuchi, C. R. Illian, and J. L. Tossounian
1674
Aids for Analytical Chemists An Exponential Dilution Flask Determining Limits of Detection in Atomic Absorption and Emission Flame Spectrometers. T. R. Booher, R. C. Elser, and J. D. Winefordner
1677
Simplified Version of the Alkali Flame Detector for Nitrogen Mode Operation. D. A. Craven
1679
W e ' l l provide you w i t h a Chromabeam 370 at an off-the-shelf price of under $7000. Or we can modify or e x p a n d it into a c u s t o m - t a i l o r e d system designed to meet your spe cialized requirements. Either way,you w i l l appreciate Chromabeam features such as: • Wavelength coverage of 4 0 0 0 to 6700 A • Energy output in excess of 20 mj • Automatic pulsing at 1 to 15 pps, also manual • Isolated dye module • Easy setup—no external air or water required, just plug it into a 115 V, 60 Hz outlet Applications for Chromabeam sys tems include spectroscopy, non linear optics, photochemistry, optical excitation and atmospheric pollution studies. For more information about the basic i n s t r u m e n t or c u s t o m s y s t e m s , c a l l A n g e l o G r i l l o at (609) 452-8980 or write Synergetics Research Inc., University Park Plaza, 741 Alexander Road, Princeton, New Jersey 0 8 5 4 0 . SYNERGETICS RESEARCH INC Circle No. 136 on Reiders' Service Card
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Takeru
ANALYTICAL CHEMISTRY, VOL. 42, NO. 13, NOVEMBER 1970
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