Villacis Chiriboga, Jose AndresOrtiz Ulloa, Silvia JohanaVoorspoels, Stefan2023-01-202023-01-2020220889-1575https://www.scopus.com/record/display.uri?eid=2-s2.0-85131624281&doi=10.1016%2fj.jfca.2022.104616&origin=inward&txGid=a9f9d74f1a07fc141e7d72a458ff36bdAn interlaboratory comparison was done for the analysis of carotenoids in freeze-dried mango. The study was performed from July to September 2018. Mango fruit was freeze-dried, homogenized, and packaged under vacuum conditions in portions of 6 g (test sample). Two test samples were sent to the participating laboratories for analysis. Laboratory results were rated using Z-scores in accordance with ISO 13528 and ISO 17043. The standard deviation for proficiency assessment (also called target standard deviation) was determined using a modified Horwitz function and varied between 10% and 25%, depending on the analyte. Out of 14 laboratories from 10 different countries, 9 laboratories (64%) obtained a satisfactory performance (Z ≤ 2) for the analysis of β-carotene. While for 7 laboratories that analyzed α-carotene, (9Z)-β-carotene, β-cryptoxanthin, and zeaxanthin, 4 laboratories (57%) obtained a satisfactory performance. However, only 2 laboratories out of 7 (29%) obtained a satisfactory performance for lutein. Based on the comparability of the analytical results, this study concludes that freeze-dried mango pulp can be used as a reference material for the analysis of α and β-carotene, (9Z)-β-carotene, β-cryptoxanthin, and zeaxanthin by applying different analytical procedures for their extraction and quantification.es-ESInterlaboratory analysisIsomersLipophilic compoundsLiquid chromatographyQuality assuranceReference materialARTÍCULO10.1016/j.jfca.2022.104616