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This report describes the preparation and certification of four maize powder CRM's with different mass fractions of genetically modified dry powder. Certified reference materials MZ-0, MZ-0.1, MZ-0.5 and MZ-2 form set of 4 CRM's of dried maize powder of genetically modified maize. The CRM's were produced by IRMM in collaboration with Fluka Chemie AG and with the support of Novartis seeds AG in the frame of a project of the Environment Institute of the Joint Research Centre of the European Commission aiming at the validation of the polymerase chain reaction screening method for the detection of genetically modified plants. They were validated in a laboratory intercomparison to which contributed 22 laboratories, analyzing 352 unknown and randomly distributed samples containing the four CRM's.

Additional information

Authors: PUWELS j, IRMM Geel (BE);KRMAER G N, IRMM Geel (BE);SCHIMMEL H, IRMM Geel (BE);ANKLAM E, Environment Institute, Ispra (IT);LIPP M, Environment Institute, Ispra (IT);BRODMANN P, Kantonales Laboratorium Basel-Stadt (CH)
Bibliographic Reference: EUR 18684 EN, (1999) 15pp.
Availability: Available free of charge from CCR Ispra (IT)
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