High-purity internal standards, partially and uniformly C13 labeled, and certified with uncertainty for mycotoxins analysis by LC-MS-MS. Ready-to-use solution enabling you to generate calibration curves, and to control and correct your extraction method. The certified values and uncertainty are determined in accordance with NF ISO 33401, ISO 17034, ISO/IEC 17025, ISO33405, ISO TR 16476 and JCGM 100.