Briefs Reagent Stability in the Modified Pararosaniline Method for the Determination of Formaldehyde
390
Arnold T. J. M. Kuijpers*, Analytical Department, Research and Patents Division, DSM, Post Box 18, 6160 MD Geleen, The Netherlands, and Jos Neele, Laboratory of Environmental Chemistry, National Institute of Public Health, Post Box 1, 3720 BA Bilthoven, The Netherlands Anal. Chem. ,55(1983) Low-Temperature Filter Paper Phosphorescence 391 S. L. McCall and J. D. Winefordner*, Department of Chemistry, University of Florida, Gainesville, Fla. 32611 Anal. Chem., 55 (1983)
Aids for Analytical Chemists E R C - 3 0 0 0
series
ι No change in the mixture ratio of solvent because of the membrance separation system ι Safety and no change of solvent because of no heating of process.
Comparison Data Degassed by ERC-3110
Degassed by conventional method
Determination of Alkyl Quaternary Ammonium Compounds by Liquid Chromatography with Indirect Photometric Detection 393 J. R. Larson· and C. D. Pfeiffer, Analytical Laboratories, Dow Chemical U.S.A., Midland, Mich. 48640 Anal. Chem., 55 (1983) Size Fractionation of Thin-Layer Chromatography Silica Gel by Sedimentation for Liquid Chromatography 396 Kenneth D. McMurtrey* and Paul J. DesLauriers, Department of Chemistry, Southern Station Box 8190, University of Southern Mississippi, Hattiesburg, Miss. 39406 Anal. Chem., 55 (1983) On-Column Injection with Glass Capillary Gas Chromatography Columns
Fusheng Wang, Henry Shanfield, and Albert Zlatkis*, Department of Chemistry, University of Houston, Houston, Tex. 77004 Anal. Chem., 55 (1983)
ι Solvent: Distilled water ι Detector: ERC-7510 ( 0 . 2 5 x 1 0 - 5 R I U / F S )
Determination of Double Bonds and isomer Purity of Olefins 398
Flow Diagram njector
ERC-31 1 Ο to Detector
mur- \
r
»> α > /// /// îiiiiau—>Z Λ Y/A%)
397
Louis F. Heckelsberg, Research and Development, Phillips Petroleum Company, Bartlesville, Okla. 74004 Anal. Chem., 55 (1983)
ο
Solvent
Under
patent
application
Industrial Hygiene Personal Sampling of 2-Ethylhexanol and Determination by Flame Ionization Gas Chromatography 400
Pump
in several
countries
For more information, contact
Joseph Russo and Shane S. Que Hee*, Department of Environmental Health, University of Cincinnati Medical Center, 3223 Eden Avenue, Cincinnati, Ohio 45267 Anal. Chem., 55 (1983)
ERMA OPTICAL WORKS, LTD. Scientific Instruments Department 2-4-5, Kajicho, Chiyoda-ku Tokyo, Ι Ο Ι Japan Telex : J25301 ERMAWORK Cable: ERMAWORKS TOKYO
CIRCLE 111 ON READER SERVICE CARD 124 A · ANALYTICAL CHEMISTRY, VOL. 55, NO. 2, FEBRUARY 1983
