1. ELISA Kit for Peanut Protein Determination: Collaborative Study
- Author
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Josef Brychta, Jorge Martinez Quesada, Jiri Pavelka, Kristiina Takkinen, Frantisek Stumr, Jan Plicka, Hana Bulawová, Zdenka Subrtová, Katerina Netusilová, Esther Sunen Pardo, Avrelija Cencič, Hana Lexmaulová, Jana Rysová, Lubica Piknová, Tomaz Langerholc, Sona Barsová, Jorge Antonio Guisantes Del Barco, Martina Blazková, Marja-Leena Laukkanen, Dana Gabrovská, Stefania Iametti, Idoia Postigo Resa, and Petr Cuhra
- Subjects
Pharmacology ,Detection limit ,Reproducibility ,Chromatography ,Arachis ,Calibration curve ,Chemistry ,business.industry ,food and beverages ,Enzyme-Linked Immunosorbent Assay ,Repeatability ,Analytical Chemistry ,Biotechnology ,Protein content ,Ingredient ,Elisa kit ,Limit of Detection ,Environmental Chemistry ,Reagent Kits, Diagnostic ,Cooperative Behavior ,Elisa method ,business ,Agronomy and Crop Science ,Plant Proteins ,Food Science - 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 proteins/kg) for the kit were calculated.
- Published
- 2013
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