QuEChERS tubes, bulk media, build your own media and tubes. Featuring CarbonX technology, United Science specializes in QuEChERS for all fruits and vegetables for pesticides analysis in food. CarbonX is a revolutionary engineered carbon specifically designed for sample preparation and analytical work. It replaces graphitized carbon black (GCB) in sample prep methods. In QuEChERS pesticide analysis, it offers benefits of high planar pesticide recovery, better baselines, and more matrix removal. QuEChERS technique is not limited to food safety applications. It can be used for sample preparation in all kinds of water, environmental, and pharmaceutical applications.