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Pilolli R, Lamonaca A, Nitride C, De Angelis E, van Poucke C, Gillard N, Huet AC, De Loose M, Henrottin J, Mills ECN, Monaci L. In-house validation of an LC-MS method for the multiplexed quantitative determination of total allergenic food in chocolate. Anal Bioanal Chem 2024; 416:809-825. [PMID: 37615691 PMCID: PMC10766722 DOI: 10.1007/s00216-023-04894-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/28/2023] [Accepted: 07/31/2023] [Indexed: 08/25/2023]
Abstract
Mass spectrometry has been widely accepted as a confirmatory tool for the sensitive detection of undeclared presence of allergenic ingredients. Multiple methods have been developed so far, achieving different levels of sensitivity and robustness, still lacking harmonization of the analytical validation and impairing comparability of results. In this investigation, a quantitative method has been validated in-house for the determination of six allergenic ingredients (cow's milk, hen's egg, peanut, soybean, hazelnut, and almond) in a chocolate-based matrix. The latter has been produced in a food pilot plant to provide a real and well-characterized matrix for proper assessment of method performance characteristics according to official guidelines. In particular, recent considerations issued by the European Committee for Standardization have been followed to guide a rigorous single-laboratory validation and to feature the main method performance, such as selectivity, linearity, and sensitivity. Synthetic surrogates of the peptide markers have been used both in native and labelled forms in matrix-matched calibration curves as external calibrants and internal standards, respectively. A two-order of magnitude range was investigated, focusing on the low concentration range for proper assessment of the detection and quantification limits (LOD and LOQ) by rigorous calibration approach. Conversion factors for all six allergenic ingredients have been determined for the first time to report the final quantitative information as fraction of total allergenic food protein (TAFP) per mass of food (µgTAFP/gfood), since such a reporting unit is exploitable in allergenic risk assessment plans. The method achieved good sensitivity with LOD values ranging between 0.08 and 0.2 µgTAFP/gfood, for all ingredients besides egg and soybean, whose quantitative markers reported a slightly higher limit (1.1 and 1.2 µgTAFP/gfood, respectively). Different samples of chocolate bar incurred at four defined concentration levels close to the currently available threshold doses have been analyzed to test the quantitative performance of the analytical method, with a proper estimate of the measurement uncertainty from different sources of variability. The sensitivity achieved resulted in compliance with the various threshold doses issued or recommended worldwide.
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Affiliation(s)
- Rosa Pilolli
- Institute of Sciences of Food Production, National Research Council of Italy (ISPA-CNR), Via Giovanni Amendola 122/O, 70126, Bari, Italy.
| | - Antonella Lamonaca
- Institute of Sciences of Food Production, National Research Council of Italy (ISPA-CNR), Via Giovanni Amendola 122/O, 70126, Bari, Italy
- University of Bari Department of Soil Plant and Food Science, Via Giovanni Amendola 165/A, 70126, Bari, Italy
| | - Chiara Nitride
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055, Portici, Italy
- School of Biological Sciences, Division of Infection, Immunity and Respiratory Medicine, Manchester Academic Health Science Centre, Manchester Institute of Biotechnology, University of Manchester, Manchester, UK
| | - Elisabetta De Angelis
- Institute of Sciences of Food Production, National Research Council of Italy (ISPA-CNR), Via Giovanni Amendola 122/O, 70126, Bari, Italy
| | - Christof van Poucke
- Flanders Research Institute for Agriculture, Fisheries and Food, Brusselsesteenweg 370, 9090, Melle, Belgium
| | | | | | - Marc De Loose
- Flanders Research Institute for Agriculture, Fisheries and Food, Brusselsesteenweg 370, 9090, Melle, Belgium
| | - Jean Henrottin
- CER Groupe, Rue du Point du Jour, 8, 6900, Marloie, Belgium
| | - E C N Mills
- School of Biological Sciences, Division of Infection, Immunity and Respiratory Medicine, Manchester Academic Health Science Centre, Manchester Institute of Biotechnology, University of Manchester, Manchester, UK
| | - Linda Monaci
- Institute of Sciences of Food Production, National Research Council of Italy (ISPA-CNR), Via Giovanni Amendola 122/O, 70126, Bari, Italy
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Pilolli R, De Angelis E, Lamonaca A, Monaci L. Standardization of a Mass Spectrometry-Based Workflow for Food Allergen Quantification. Methods Mol Biol 2024; 2717:251-267. [PMID: 37737990 DOI: 10.1007/978-1-0716-3453-0_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
In this chapter, the analytical workflow typically used for the development and validation of an analytical method tailored to food allergen detection and quantification is presented. The main steps defining the workflow are herein described and commented with specific notes about the critical issues that can be faced and common solutions to be adopted. References to guidelines and/or recommendation available from official bodies, as well as main papers from international consortia operating on the specific research field, are also reported, whenever possible. As such, this chapter may represent a practical guide to drive method development in the standardization of analytical methods for food allergen detection.
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Affiliation(s)
- Rosa Pilolli
- Institute of Sciences of Food Production, National Research Council of Italy (CNR-ISPA), Bari, Italy
| | - Elisabetta De Angelis
- Institute of Sciences of Food Production, National Research Council of Italy (CNR-ISPA), Bari, Italy
| | - Antonella Lamonaca
- Institute of Sciences of Food Production, National Research Council of Italy (CNR-ISPA), Bari, Italy
| | - Linda Monaci
- Institute of Sciences of Food Production, National Research Council of Italy (CNR-ISPA), Bari, Italy.
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Smits NG, De Dominicis E, Koops AJ, Kraan R, Saner S, Van Der Fels-Klerx H, Hoek-van den Hil E. Comparison of commercial allergen ELISA kits for egg detection in food matrices. Heliyon 2023; 9:e19687. [PMID: 37780752 PMCID: PMC10539936 DOI: 10.1016/j.heliyon.2023.e19687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 08/28/2023] [Accepted: 08/30/2023] [Indexed: 10/03/2023] Open
Abstract
Consumption of low levels of egg already can evoke harmful physiological responses in humans in those allergic to eggs. By detection of egg in food products, using Egg ELISA kits to determine its unintended presence, food producers can respond to avoid potential safety or quality risks of their products. Selection of an ELISA kit fit for the issue at hand is challenging due to, amongst others, lack of information on assay performances with specified matrices. In this study, performances of seven commercial egg ELISA kits are compared for nine different relevant matrices: cookie, chocolate, pasta, dressing, stock cube, wine, vegetable drink and milk, ice cream and meat/meat replacers. The presence of egg was unified for all ELISA kits to mg total egg protein kg-1 food product. In every matrix, kit performances for recovery, intra- and interassay were compared, and also processing is accounted for by determination of egg in incurred samples. All seven kits were able to detect egg qualitatively at the VITAL3 ED01 level of 0.2 mg total egg protein and the corresponding relevant portion size for each matrix. For quantitative results, each ELISA kit showed an increase in detected egg concentration with increased egg levels and performed within the set criteria for recovery for the cookie, chocolate, stock cube and wine. For pasta, vegetable drink and milk, ice cream, and salad dressing, recovery of egg was within the set criteria for at least 4 ELISA kits. Most challenging matrices were meat/meat replacers, showing high matrix effects which could not be explained by the possible egg presence in the cognate blank. Only one ELISA kit was able to recover egg within the set criteria for the meat/meat replacer matrix. Results enable food industry to choose for ELISA kits suitable for egg detection in the matrix of interest.
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Affiliation(s)
- Nathalie G.E. Smits
- Wageningen Food Safety Research, Wageningen University and Research, P.O. Box 230, 6700, AE, Wageningen, the Netherlands
| | | | - Andries J. Koops
- Wageningen Food Safety Research, Wageningen University and Research, P.O. Box 230, 6700, AE, Wageningen, the Netherlands
| | - Rian Kraan
- Wageningen Food Safety Research, Wageningen University and Research, P.O. Box 230, 6700, AE, Wageningen, the Netherlands
| | - Samim Saner
- Mérieux NutriSciences R&D, Quality, Operation, France
| | - H.J. Van Der Fels-Klerx
- Wageningen Food Safety Research, Wageningen University and Research, P.O. Box 230, 6700, AE, Wageningen, the Netherlands
| | - Elise Hoek-van den Hil
- Wageningen Food Safety Research, Wageningen University and Research, P.O. Box 230, 6700, AE, Wageningen, the Netherlands
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Henrottin J, Pilolli R, Huet AC, van Poucke C, Nitride C, De Loose M, Tranquet O, Larré C, Adel-Patient K, Bernard H, Mills EC, Gillard N, Monaci L. Optimization of a sample preparation workflow based on UHPLC-MS/MS method for multi-allergen detection in chocolate: An outcome of the ThRAll project. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.109256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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