title: Two new reference materials based on tobacco leaves: certification for over a dozen of toxic and essential elements.
abstract: The preparation, certification, and characterization of two new biological certified reference materials for inorganic trace analysis have been presented. They are based on two different varieties of tobacco leaves, namely, Oriental Basma Tobacco Leaves (INCT-OBTL-5), grown in Greece, and Polish Virginia Tobacco Leaves (INCT-PVTL-6), grown in Poland. Certification of the materials was based on the statistical evaluation of results obtained in a worldwide interlaboratory comparison, in which 87 laboratories from 18 countries participated, providing 2568 laboratory averages on nearly 80 elements. It was possible to establish the certified values of concentration for many elements in the new materials, that is, 37 in INCT-OBTL-5 and 36 in INCT-PVTL-6, including several toxic ones like As, Cd, Hg, Pb, and so forth. The share and the role of instrumental analytical techniques used in the process of certification of the new CRMs are discussed.
authors.affiliation: Laboratory of Nuclear Analytical Methods, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland. z.samczynski@ichtj.waw.pl
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Samczyński
authors.forename: Rajmund S
authors.initials: RS
authors.lastname: Dybczyński
authors.forename: Halina
authors.initials: H
authors.lastname: Polkowska-Motrenko
authors.forename: Ewelina
authors.initials: E
authors.lastname: Chajduk
authors.forename: Marta
authors.initials: M
authors.lastname: Pyszynska
authors.forename: Bożena
authors.initials: B
authors.lastname: Danko
authors.forename: Elżbieta
authors.initials: E
authors.lastname: Czerska
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Kulisa
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Doner
authors.forename: Paweł
authors.initials: P
authors.lastname: Kalbarczyk
mesh_terms: D007753:Laboratories; D010316:Particle Size; D018515:Plant Leaves / Q000737:chemistry* / Q000633:toxicity; D012015:Reference Standards; D014026:Nicotiana / Q000737:chemistry*; D014131:Trace Elements / Q000032:analysis*
chemical_list: D014131:Trace Elements