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. - These, Anja; Klier, Bernhard; Moennig, Anja; Schuett, Frank; Elflein, Lutz; Gabriel, Franziska; Mank, Helmut; Goldbeck, Christophe; Graffelmann, Lutz; Himmel, Julia; Einig, Martin; Keuth, Oliver; et al. (Food Additives & Contaminants. Part A: Chemistry, Analysis, Control, Exposure & Risk Assessment, 2026)