J&W SCIENTIFIC

Rape Seed Oil. Column: Film Thickness: Carrier: Oven: ... Brussel, Laarbeeklaan 103, B-1090 Brussels, Belgium, and Dierik. Verbeelen, Academisch Zieke...
8 downloads 0 Views 1MB Size
BRIEFS FROM

J&W SCIENTIFIC NEW! A BREAKTHROUGH IN GAS CHROMATOGRAPHY

DB-23 MADE BY FAMOUS ELVES

Rape Seed Oil Column: Film Thickness: Carrier: Oven: Injection: Detector:

DB-23 30m χ 0.25mm I.D. .25 micron Hydrogen @ 40 cm/sec 185°C Isothermal .2μΙ split injection F.I.D.

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.

14:0 Methyl 16:0 Methyl 18:0 Methyl 18:1 Methyl 18:2 Methyl 18:3 Methyl 20:0 Methyl 20:1 Methyl 22:0 Methyl 22:1 Methyl 24:0 Methyl

myristoleate palmitelaidate stéarate oleate linoleate linolenate arachidonate eicosenoate behenate erucate lignocerate

Correspondence Procedure for Increasing the Accuracy of the Initial Data Point Slope Estimation by Least-Squares Polynomial Filters 369 Arshad Khan, Chemistry Department, The Pennsylvania State University, Dubois, Pa. 15801 Anal. Chem., 60 (1988)

Use of a Water-Cooled Low-Flow Torch in Inductively Coupled Plasma Mass Spectrometry 372 J. S. Gordon, VG Isotopes, Ion Path, Road Three, Winsford, Chesh­ ire CW7 3BX, England, and P.S.C. van der Plas and Leo de Galan*, Laboratorium voor Algemene en Analytische Scheikunde, de Vries van Heystplantsoen 2, 2628 RZ Delft, The Netherlands Anal. Chem., 60 (1988)

Bias in Quantitative Capillary Zone Electrophoresis Caused by Electrokinetic Sample Injection 375 Xiaohua Huang, Manuel J. Gordon, and Richard N. Zare*, Department of Chemistry, Stanford University, Stanford, Calif. 94305 Anal. Chem., 60 (1988)

Technical Notes

• BONDED AND CROSS-LINKED STATIONARY PHASE DESIGNED FOR THE ANALYSIS OF FATTY ACID METHYL ESTERS (FAMES) AND DIOXIN ISOMERS. • AN IMMOBLIZED, POLAR STATIONARY PHASE SYNTHESIZED AT J&W SCIENTIFIC • AVAILABLE AS A HIGH RESOLUTION CAPILLARY COLUMN OR AS A MEGABORE COLUMN - "THE PACKED COLUMN ALTERNATIVE" • AN OPERATIONAL TEMPERATURE RANGE OF 40 - 250 °C • DB-23 REPLACES OTHER POLAR STATIONARY PHASES SUCH AS SP-2310, SP-2330, SP-2331, SP-2340, OV-275 AND DEGS FOR MANY APPLICATIONS. Call or write for FREE product bulletin! J&W Shows a Chromatographer's View of New Orleans at: PIT-CON, Booth #3856-59

J&W J&W

Temperature Control and Local Heating Effects in LaserIlluminated Samples Cooled by Closed-Cycle Helium Refrigerators 377 J. W. Hofstraat*, A. J. Schenkeveld, C. Gooijer, and Ν. Η. Velthorst, Department of General and Analytical Chemistry, Free University, De Boelelaan 1083, 1081 HV Amsterdam, The Nether­ lands Anal. Chem., 60 (1988)

Determination of Aluminum in Dialysate Concentrates by Lvov Platform Graphite Furnace Atomic Absorption Spectrometry 380 Johanna Smeyers-Verbeke*, Farmaceutisch Instituut, Laborato­ ry for Pharmaceutical and Biomedical Analysis, Vrije Universiteit Brussel, Laarbeeklaan 103, B-1090 Brussels, Belgium, and Dierik Verbeelen, Academisch Ziekenhuis, Renal Unit of the Department of Medicine, Vrije Universiteit Brussel, Laarbeeklaan 103, B-1090 Brussels, Belgium Anal. Chem., 60 (1988)

Potentiometric Determination of Halogen Content in Organic Compounds Using Dispersed Sodium Reduction 383 Margaret L. Ware, Mark D. Argentine, and Gary W. Rice*, Department of Chemistry, College of William and Mary, Williams­ burg, Va. 23185 Anal. Chem., 60 (1988)

SCIENTIFIC

S P E C I A L I Z I N G IN H I G H R E S O L U T I O N

CHROMATOGRAPHY

91 BLUE RAVINE ROAD, FOLSOM, CA 9 5 6 3 0 (916) 985-7888

SEND FOR OUR FREE 144 PAGE CATALOG Manufactured Under H.P. U.S. Patent 4,293,415

CIRCLE 77 ON READER SERVICE CARD

264 A · ANALYTICAL CHEMISTRY, VOL. 60, NO. 4, FEBRUARY 15, 1988