Rapid Determination of Pesticides in Spinach

Using Supel™ Sphere Carbon/NH2 and an SLB®-5ms GC ColumnHighly pigmented foods, such as spinach, require cleanup prior to analysis for pesticide residues. A dual-layer SPE tube containing graphitized carbon and aminopropyl on silica (NH2) is often used. • Carbon removes pigments and sterols• NH2 removes fatty acids, polar pigments, organic acids, ...