Sigma Aldrich Co Ltd
Supelco brand - Sample preparation (SPE, SPME, dSPE) and Chromatography (HPLC, GC) products Fluka brand - sensoric applications, reagents and chemicals (LCMS solvents, general extraction solvents), analytical standards and CRMs (ISO17025/Guide34/Guide35 Inorganic and Organic standards), microbiology