Now, Flexible Fused Silica WCOT Capillary Columns By Analabs... A Company You Already Trust! Flexible Wall Coated Open Tubular (WCOT) columns with breakage virtually eliminated — and with guaranteed efficiency. Because of our static coating Comprehensive technique combined with our high temperature deactivation process, you can count on the utmost in reproducibility of McReynolds constants and film thickness. And we test each column and include the original chromatogram when we ship. Analabs production procedures, combined with properties inherent in synthetic-fused silica, result in WCOT capillary columns that have high thermal stability, greater chemical inertness and are extremely easy to install. Our standard film thickness is 0.2 /*m. Additional film thicknesses are available Order of Elution for special applications. 1. 2,3 butanediol 5. Write or call today for flexible fused 2. n-decane 6. silica columns by the name you can trust 3. 1-octanol 7. . . . Analabs. 4. nonanal 8. Analabs, A Unit of Foxboro Analytical, 80 Republic Drive, North Haven, CT 06473; (203) 288-8463. For free placement of orders call 800-243-4398.
"Grob" Test
n-undecane 2,6-dimethyl phenol 2,6-dimethyl analine 2-ethylhexanoic acid
9. 10. 11. 12.
methyl decanoate dicyclohexylamine methyl undecanoate methyl dodecanoate
FOXBORO
High Temperature GC Phases Extended column life at 400° and beyond Separate amino acids, drugs, paraffins, hydrocarbons, natural waxes, pesticides, fatty acids, steroids, alcohols, etc.,—at column temperatures of 400°C and more. Routinely. With outstanding selectivity. Columns packed with Dexsil 300 GC have shown negligible bleed from 20° to 450°C. Limited life applications can be performed at temperatures to 500°C. Two other Dexsil polymers—400GC and 410GC—can be selected according to application and used at temperatures to 400°C. When used at lower temperatures up to 350°C, the Dexsils offer the advantages of using more sensitive GC settings and increasing column life because of the Dexsils' low bleed. Users report column life under routine conditions at 2, 3, 4 years and more. Dexsil is available worldwide. Write for details and an exhaustive bibliography of over 300 Dexsil
®
DEXSIL
2 9 5 T r e a d w e l l Street · H a m d e n , CT 0 6 5 1 4 · Registered Wade Mark Dexsil Chemical Corporation Hamden CT.
CIRCLE 108 ON READER SERVICE CARD
362 A · ANALYTICAL CHEMISTRY, VOL. 54, NO. 2, FEBRUARY 1982
(203) 288-3509
