SPECIFY W H E A T O N -33 SAMPLE VIALS ... for Safekeeping •
Wheaton-33 low extractable borosilicate glass is the best protection you can provide for sensitive samples • Wheaton-33 low extractable borosilicate glass maintains sample purity and pH • Wheaton-33 low extractable borosilicate glass can be heat sterilized and stored at low temperature • Wheaton-33 low extractable borosilicate glass is manufactured exclusively by Wheaton Not all sample vials are alike. Not all sample vials provide the protection required to maintain the integrity of your valuable samples. Only Wheaton-33 sample vials are manufactured from Wheaton-33 low extractable borosilicate glass — the absolute safest protection a sample can get. Are your sample vials manufactured with Wheaton-33 low extractable glass? Specify Wheaton-33 Sample Vials. For product information and a list of the Wheaton distributors nearest you please contact Wheaton 1-800-225-1437 or FAX 1-609-825-1368.
BRIEFS
Correspondence Pulsed Rapid Heating Method for Volatilization of Biological Molecules in Multiphoton Ionization Mass Spectrometry 2188 D a v i n d e r S. Nagra, J i a n - Y u n Zhang, and Liang Li*, Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
Technical Notes Improved End-Column Conductivity Detector for Capillary Zone Electrophoresis 2193 Xiaohua H u a n g and Richard N. Zare*, Department of Chemistry, Stanford University, Stanford, CA 94305-5080
Surface-Enhanced Raman Spectroscopy with Abrasively Modified Fiber Optic Probes 2196 Ken I. Mullen and Keith T. Carron*, Department of Chemistry, University of Wyoming, Laramie, WY 82071-3838
Modular Data System for Selective Waveform Excitation and Trapping Experiments in Fourier Transform Mass Spectrometry 2200 S. C. Beu and D. A. Laude, Jr.*, Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, TX 78712
Preparation of Solid Membrane Chloride Ion Selective Electrodes by Ion Implantation 2203 Robert S. Glass*, Ronald G. Musket, and Keith C. Hong, Chemistry and Materials Science Department, Lawrence Livermore National Laboratory, Livermore, CA 94550
Preparation of Polyacrylamide Gel-Filled Fused-Silica Capillaries by Photopolymerization with Riboflavin as the Initiator 2207 Tianlin Wang, Gerard J. Bruin, J o h a n C. Kraak, and Hans Poppe*, Laboratory for Analytical Chemistry, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands
Correction. Composite Multivariate Quality Control Using a System of Univariate, Bivariate, and Multivariate Quality Control Rules 2208 S. J. Smith*, S. P. Caudill, J. L. Pirkle, and D. L. Ashley, Division of Environmental Health and Laboratory Sciences, Center for Environmental Health and Injury Control, Centers for Disease Control, Public Health Service, U.S. Department of Health and Human Services, Atlanta, GA 30333
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916 A · ANALYTICAL CHEMISTRY, VOL. 63, NO. 19, OCTOBER 1, 1991
