caa a22 4500 605466017 CHVBK 20210128100305.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s00769-015-1119-2 doi (NATIONALLICENCE)springer-10.1007/s00769-015-1119-2 Honey as a material for proficiency testing [Elektronische Daten] [L. Ciaralli, A. Turco, M. Ciprotti, A. Colabucci, M. Di Gregorio, A. Sorbo] Honey is widely analysed by many European Union control laboratories for heavy metals in foodstuffs. No maximum levels are set for cadmium and lead in this matrix, but most of the member states include this analytes-matrix combination in their National Residue Monitoring Plans setting specific action levels. The need to harmonize these values is under consideration within the European Commission. The lack of suitable certified reference materials as well as the scarcity of appropriate proficiency testings imply a difficulty for the official and National Reference Laboratories in the assessment of their method performance. The European Union Reference Laboratory for Chemical Elements in Food of Animal Origin organized the 19th PT on the determination of cadmium and lead in honey giving its network the possibility of checking the performances of the analytical methods used. An adequate procedure for the preparation of honey material spiked with cadmium and lead at values of mass fraction of interest (roughly 20 and 100µgkg−1 for cadmium and lead, respectively) was developed. A commercial wildflower honey was spiked at proper concentration levels, achieving suitable fluidity and homogeneity by mild heating and stirring. Homogeneity and stability were investigated using an ad hoc validated analytical method and the PT material was found homogeneous and stable, covering the time span of the interlaboratory comparison. These outcomes as well as the good agreement between the assigned values and the values obtained from the homogeneity test confirmed the effectiveness of the procedure for the production of the material and the fitness of the material for the purpose of this PT. Springer-Verlag Berlin Heidelberg, 2015 European Union Reference Laboratory nationallicence Cadmium nationallicence Lead nationallicence Honey nationallicence Proficiency testing material nationallicence Interlaboratory comparison nationallicence Ciaralli L. European Union Reference Laboratory for Chemical Elements in Food of Animal Origin (EURL-CEFAO), Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy aut Turco A. European Union Reference Laboratory for Chemical Elements in Food of Animal Origin (EURL-CEFAO), Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy aut Ciprotti M. European Union Reference Laboratory for Chemical Elements in Food of Animal Origin (EURL-CEFAO), Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy aut Colabucci A. European Union Reference Laboratory for Chemical Elements in Food of Animal Origin (EURL-CEFAO), Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy aut Di Gregorio M. European Union Reference Laboratory for Chemical Elements in Food of Animal Origin (EURL-CEFAO), Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy aut Sorbo A. European Union Reference Laboratory for Chemical Elements in Food of Animal Origin (EURL-CEFAO), Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy aut Accreditation and Quality Assurance Springer Berlin Heidelberg 20/5(2015-10-01), 359-365 0949-1775 20:5<359 2015 20 769 https://doi.org/10.1007/s00769-015-1119-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00769-015-1119-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ciaralli L. European Union Reference Laboratory for Chemical Elements in Food of Animal Origin (EURL-CEFAO), Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy aut NATIONALLICENCE 700 1- Turco A. European Union Reference Laboratory for Chemical Elements in Food of Animal Origin (EURL-CEFAO), Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy aut NATIONALLICENCE 700 1- Ciprotti M. European Union Reference Laboratory for Chemical Elements in Food of Animal Origin (EURL-CEFAO), Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy aut NATIONALLICENCE 700 1- Colabucci A. European Union Reference Laboratory for Chemical Elements in Food of Animal Origin (EURL-CEFAO), Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy aut NATIONALLICENCE 700 1- Di Gregorio M. European Union Reference Laboratory for Chemical Elements in Food of Animal Origin (EURL-CEFAO), Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy aut NATIONALLICENCE 700 1- Sorbo A. European Union Reference Laboratory for Chemical Elements in Food of Animal Origin (EURL-CEFAO), Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy aut NATIONALLICENCE 773 0- Accreditation and Quality Assurance Springer Berlin Heidelberg 20/5(2015-10-01), 359-365 0949-1775 20:5<359 2015 20 769