Established in 1985, we here at Restek are dedicated to providing our clients and customers with the highest quality chromatography supplies and customer service available. GC Columns: A full selection of general-purpose and specialty stationary phases available on highly inert Rxi fused silica or unbreakable MXT stainless steel; choose from WCOT columns, PLOT columns, packed or micropacked columns, and more. LC Columns: The widest range of selectivity in the industry with just a handful of phases to simplify column selection for HPLC and UHPLC; choose from Force, Raptor, Roc, and other silica supports for analytical and prep columns. GC and LC Accessories: Tools, maintenance supplies, and instrument replacement parts that meet or exceed original equipment manufacturers’ performance: innovative, lab-proven, and available for every make and model of instrument. Reference Standards: Over 1500 different stock formulations on the shelf and ready to ship; both stock and custom certified reference materials (CRMs) are manufactured and QC-tested in ISO-accredited labs. Air Sampling: Air sampling canisters featuring RAVE+ valves, gas calibration standards, gas sampling bags, personal air samplers, thermal desorption (TD) tubes, and more; Siltek and Sulfinert treatments for unsurpassed inertness. Sample Preparation: Resprep solid phase extraction (SPE) and protein precipitation (PPT), Revive in-line sample preparation (ILSP), Q-sep QuEChERS, solid phase microextraction (SPME), ASE extraction, sample filtration, vials, syringes, and other sample prep products. With a broad range of products and services from a friendly team of experts, we can guarantee you a smooth service. So call today on 01494 563377 or visit www.thamesrestek.co.uk.