Studies on the representativeness of sampling large lots of dried herbs and dried spices for their pyrrolizidine alkaloid content and results of the subsequent homogenisation of the laboratory sample

Anja These; Bernhard Klier; Anja Moennig; Frank Schuett; Lutz Elflein; Franziska Gabriel; Helmut Mank; Christophe Goldbeck; Lutz Graffelmann; Julia Himmel; Martin Einig; Oliver Keuth; Nicole Lorenz; Jennifer Mels; Arne Mohring; Bettina Pengel; Sabine Schwartz; Birgit Wienecke; Maximilian Wittig; Farshad La-Rostami; Michael Weiß