W.R.GRACE & CO.-CONN.

ADSORBOSIL-

ADSORBENTS FOR CHROMATOGRAPHY;

ALLTECH

Laboratory Equipment for Gas and Liquid Chromotography Procedures-Namely, Glass and Metal Prepacked and Empty Columns; Connecting Tubes, Tube Benders and Cutters, Connection Fittings and Tools and End Caps and Plugs; Column Packings and Units for Facilitating Packing; Capillary Columns; Pumps, Valves and Injectors; Filtering Units and Separators; Gas Flow Control Valves and Tube Fittings; Gas Purifiers; Gas Sampling Apparatus and Containers for Collecting and Holding Samples-Namely, Bags and Bulbs and Vials; Closure Septa; Gas and Liquid Syringes and Parts, Therefor; Laboratory Glassware-Namely, Test Tubes, Tubes, Pipettes and Beakers; Calibration Instruments; Thin Layer Chromotographic Plates and Parts Therefor; Electrically-Driven Data Recorders; and Parts Therefor;Analytical Standard Chemical Material and Kits Including the Same; Calibration Gases; Silylation Reagents and Derivatizing Agents, and Solvents, All for Use in Gas and Liquid Chromatographic Procedures;

VYDAC

chromatology columns;chemicals for chromatography; namely, packing material for chromatology columns;