Founded in 1985, Restek is a leading developer and manufacturer of chromatography columns, sample preparation products, reference standards, and instrument accessories. We work with analysts around the world, providing them with tools to monitor the quality of air, water, soil, foods, botanicals, pharmaceuticals, and petrochemical products. GC Columns: General-purpose and specialty stationary phases on highly inert Rxi fused silica or unbreakable MXT stainless steel; WCOT or PLOT columns, packed or micropacked columns, and more. LC Columns: Force, Raptor, Roc, and other silica supports for HPLC and UHPLC analytical and prep columns. GC and LC Accessories: Tools, maintenance supplies, and instrument replacement parts that meet or exceed original equipment manufacturers performance: lab-proven and available for any instrument. Reference Standards: Over 1500 stock formulations; both stock and custom certified reference materials (CRMs) are manufactured and QC-tested in ISO-accredited labs. 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 more. Restek is an independent, 100% employee-owned company with a strong corporate culture. We are committed to providing exceptional Plus 1 customer service that exceeds your expectations. Our customers work makes the world a safer and healthier place, and we are excited to help you make a difference. Contact your local Restek representative today at www.restek.com/contact-us