1390-65421390-6542S1390-6542201800020005910.29019/enfoqueute.v9n2.295Ecuador00062018000620189259692015333213-20201020102444358-6320122022607-12200919974-92003159-69201598774352-632011Codex2005201112269-7720001877549-79200619719718-2720082009171129-3620102011Instituto Ecuatoriano de Normalización2004Instituto Ecuatoriano de Normalización.200820032739-4520142010751121-7200861114409-211993200620122003Zurich, Suiza 20051544361-7Official Method of Analysis of AOAC International2012201497774043-51200962114967-822009200615527-30200790662641-54201766268-752002201211229-20