title: ELISA kit for peanut protein determination: collaborative study.
abstract: A collaborative study in 10 laboratories was performed to validate an ELISA method developed for the quantitative determination of peanut protein in foods. The ELISA kit used for this study is based on rabbit polyclonal antibody. This kit does not produce any false-positive results or cross-reactivity with a broad range of peanut-free food matrixes. All participants obtained the peanut ELISA kit with standard operational procedures, a list of samples, the samples, and a protocol for recording test results. The study included 15 food samples. Three food matrix samples of zero peanut content showed peanut protein content lower than the first standard (0.10 mg/kg). Three samples with peanut declared as an ingredient revealed peanut protein content outside the calibration curve (absorbance was above the highest standard) in all laboratories, and three samples had the peanut content reported either above the highest standard or within the calibration curve, depending on the laboratory. Six samples with peanut declared as an ingredient gave the peanut protein content within the calibration curve. Only these six samples, together with a positive control sample (CS2), were used for statistical evaluation. The statistical tests (Cochran, Grubbs, and Mandel) and analysis of variance were used for the evaluation of the collaborative study results. Repeatability and reproducibility limits, as well as an LOQ (LOQcollaborative 0.22 mg peanut proteins/kg) and an LOD (LODcollaborative 0.07 mg peanut proteinslkg) for the kit were calculated.
authors.affiliation: ELISA Development, Ltd, 412 01 Velk Zernoseky 186, Czech Republic. lexmaulovahana@seznam.cz
authors.forename: Hana
authors.initials: H
authors.lastname: Lexmaulová
authors.forename: Dana
authors.initials: D
authors.lastname: Gabrovská
authors.forename: Jana
authors.initials: J
authors.lastname: Rysová
authors.forename: Frantisek
authors.initials: F
authors.lastname: Stumr
authors.forename: Katerina
authors.initials: K
authors.lastname: Netusilová
authors.forename: Martina
authors.initials: M
authors.lastname: Blazková
authors.forename: Hana
authors.initials: H
authors.lastname: Bulawová
authors.forename: Josef
authors.initials: J
authors.lastname: Brychta
authors.forename: Zdenka
authors.initials: Z
authors.lastname: Subrtová
authors.forename: Jiri
authors.initials: J
authors.lastname: Pavelka
authors.forename: Stefania
authors.initials: S
authors.lastname: Iametti
authors.forename: Jorge Antonio Guisantes
authors.initials: JA
authors.lastname: Del Barco
authors.forename: Jorge Martinez
authors.initials: JM
authors.lastname: Quesada
authors.forename: Esther Sunen
authors.initials: ES
authors.lastname: Pardo
authors.forename: Idoia Postigo
authors.initials: IP
authors.lastname: Resa
authors.forename: Kristiina
authors.initials: K
authors.lastname: Takkinen
authors.forename: Marja-Leena
authors.initials: ML
authors.lastname: Laukkanen
authors.forename: Lubica
authors.initials: L
authors.lastname: Piknová
authors.forename: Tomaz
authors.initials: T
authors.lastname: Langerholc
authors.forename: Avrelija
authors.initials: A
authors.lastname: Cencic
authors.forename: Sona
authors.initials: S
authors.lastname: Barsová
authors.forename: Petr
authors.initials: P
authors.lastname: Cuhra
authors.forename: Jan
authors.initials: J
authors.lastname: Plicka
mesh_terms: D010367:Arachis / Q000737:chemistry*; D003299:Cooperative Behavior; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods*; D057230:Limit of Detection; D010940:Plant Proteins / Q000032:analysis*; D011933:Reagent Kits, Diagnostic
chemical_list: D010940:Plant Proteins; D011933:Reagent Kits, Diagnostic