title: Fast method for multielemental analysis of plants and discrimination according to the anatomical part by total reflection X-ray fluorescence spectrometry.
abstract: Fast and reliable analytical methodologies are required for quality control of plants in order to assure human health. Ultrasound-assisted extraction in combination with total reflection X-ray fluorescence is proposed as a fast and simple method for multielemental analysis of plants on a routine basis. For this purpose, five certified reference materials have been analysed for the determination of P, K, Ca, Cr, Mn, Fe, Ni, Cu, Zn and Pb. Different extractant media (acids and oxidants) were tried. A mixture of diluted HNO(3)+HCl+HF, was selected as the best option for the achievement of complete extractions. Accurate and precise results can be reached in most cases along with a high sample throughput. Different plants (i.e., herbs, spices and medicinal plants) were analysed. Linear discriminant analysis together with the elemental concentrations allowed the differentiation of commercial preparations corresponding to flower, fruit and leaf.
authors.affiliation: Departamento de Química Analítica y Alimentaria, Área de Química Analítica, Facultad de Química, Universidad de Vigo, Campus As Lagoas-Marcosende s/n, 36310 Vigo, Spain.
authors.forename: Inmaculada
authors.initials: I
authors.lastname: De la Calle
authors.forename: Marta
authors.initials: M
authors.lastname: Costas
authors.forename: Noelia
authors.initials: N
authors.lastname: Cabaleiro
authors.forename: Isela
authors.initials: I
authors.lastname: Lavilla
authors.forename: Carlos
authors.initials: C
authors.lastname: Bendicho
mesh_terms: D035264:Flowers / Q000033:anatomy & histology / Q000737:chemistry; D005638:Fruit / Q000033:anatomy & histology / Q000737:chemistry; D018515:Plant Leaves / Q000033:anatomy & histology / Q000737:chemistry; D010944:Plants / Q000033:anatomy & histology / Q000737:chemistry*; D013052:Spectrometry, X-Ray Emission / Q000379:methods*; D014131:Trace Elements / Q000032:analysis*
chemical_list: D014131:Trace Elements