title: Development of green onion and cabbage certified reference materials for quantification of organophosphorus and pyrethroid pesticides.
abstract: Green onion and cabbage certified reference materials for the analysis of pesticide residues were issued by the National Metrology Institute of Japan, part of the National Institute of Advanced Industrial Science and Technology. Green onion and cabbage samples were grown so as to contain several kinds of organophosphorus and pyrethroid pesticides, and those were collected from a field in the Kochi Prefecture in Japan. The certification was carried out by using multiple analytical methods to ensure the reliability of analytical results; the values of target pesticides (diazinon, fenitrothion, cypermethrin, etofenprox, and permethrin for green onion and chlorpyrifos, fenitrothion, and permethrin for cabbage) were obtained by isotope dilution mass spectrometry. Certified values of target pesticides were 0.96-13.9 and 2.41-6.9 mg/kg for green onion and cabbage, respectively. These are the first green onion and cabbage powder certified reference materials in which organophosphorus and pyrethroid pesticides are determined.
authors.affiliation: National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan. t-ootake@aist.go.jp
authors.forename: Takamitsu
authors.initials: T
authors.lastname: Otake
authors.forename: Takashi
authors.initials: T
authors.lastname: Yarita
authors.forename: Yoshie
authors.initials: Y
authors.lastname: Aoyagi
authors.forename: Youko
authors.initials: Y
authors.lastname: Kuroda
authors.forename: Masahiko
authors.initials: M
authors.lastname: Numata
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Iwata
authors.forename: Kazushi
authors.initials: K
authors.lastname: Mizukoshi
authors.forename: Munetomo
authors.initials: M
authors.lastname: Nakamura
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Watai
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Mitsuda
authors.forename: Takashi
authors.initials: T
authors.lastname: Fujikawa
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Ota
mesh_terms: D001937:Brassica / Q000737:chemistry*; D007201:Indicator Dilution Techniques; D007564:Japan; D013058:Mass Spectrometry / Q000379:methods; D019697:Onions / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D011722:Pyrethrins / Q000032:analysis*; D012015:Reference Standards; D015203:Reproducibility of Results
chemical_list: D009943:Organophosphorus Compounds; D010573:Pesticide Residues; D011722:Pyrethrins