Ceramic grinding media are excellent for mixing samples for extraction methods such as pesticide residue analysis (QuEChERS) or extracting oil from fish and seafood. Typically two cylinders are used per sample vial. Can’t find the standards you are looking for? Spex CertiPrep can make custom standards to meet your exact needs. Contact us for more information at CRMsales@spex.com or call us at 732-549-7144. Angle-cut ends help shear sample matrix for thorough extraction of analyte into the solvent Constructed of durable ceramic Use with standard 5 or 15 mL centrifuge tubes