RESTEK Corporation is one of the chromatography consumables companies in the United States. It has grown from an incubation project at the University of Pennsylvania to a global chromatography technology company, and its success is due to continuous product innovation and excellent customer service. The company's main products include Restek pesticide residue analysis columns, Restek capillary columns, Rtx capillary columns, Linde standard gas, Parker nitrogen generators. As a chemical enterprise, Retek has sales offices in more than 80 countries and has branch offices in multiple countries to better serve our customers. The industries served by RESTEK include food and drug safety, environmental and energy monitoring, as well as being used in fields such as healthcare and inspection and quarantine. Our clients include large chemical companies such as Bayer, BASF, Dow, as well as the US Environmental Protection Agency (EPA) and environmental laboratories in various states. The company's products were also used by NASA on the Cassini spacecraft, which served for 7 years in the solar system for scientific exploration of Saturn.