Pharmaceutica Analytica Acta

Silvia Ruiz-Velasco

Publications

• Research Article
  Aflatoxins in Walnut (Juglans regia L.), Pecan (Carya illinoinensis (Wangenh.) K. Koch) and Cashew (Anacardium occidentale L.) Nuts of Mexico
  Author(s): José Adaya-González, Magda Carvajal-Moreno, Francisco Rojo-Callejas and Silvia Ruiz-VelascoJosé Adaya-González, Magda Carvajal-Moreno, Francisco Rojo-Callejas and Silvia Ruiz-Velasco
  
  Aflatoxins (AF) are toxic and carcinogenic secondary metabolites produced by Aspergillus molds, in oilseeds. Objective: To identify and quantify AF (AFB1, AFB2, AFG1 and AFG2) in walnuts, pecans and cashews consumed in Mexico using a validated method. Methods: The nut sampling was conducted in the three main markets of the 16 boroughs of Mexico City. The samples were homogenized, the extraction method was validated, and the concentrations of the 4 AF were determined by immunoaffinity columns. The identification and quantification of the AF was carried out by high performance liquid chromatography. A statistical analysis included the Wilcoxon/Kruskal-Wallis test to compare the variation of the origin of samples, types of AF and nut. Results: The recovery percentages of the AF ranged from 75% to 95%. The limits of detection (LOD) of the AF (ng/g), based on the calibration curves, were: .. View More»
  DOI: 10.4172/2153-2435.1000338

  Abstract PDF