0187-5779 0187-5779 S0187-57792019000400425 10.28940/terra.v37i4.543 Mexico Mexico México Mexico Mexico 00 12 2019 00 12 2019 37 4 425 435

2008 33 33 483‑489 1999 2001 AOAC (Association of Official Analytic Chemists) 1980 13th 2005 43 43 1-9 2009 CONAGUA (Comisión Nacional del Agua) 2016 2016 2008 49 49 2106-16 2014 14 14 401-17 FAO/WHO (Food and Agriculture Organization of the United States-World Health Organization) FAO/WHO 2011 6 2005 99 99 1392-403 2006 11 11 610-7 2007 21 21 2176-203 2010 49 49 6885-8 2006 84 2002 Colorado Springs, CO, USA 2006 142 142 34-8 2010 2 2 33-40 2013 4 4 138-46 2014 30 30 365-77 2016 32 32 463-75 2001 19 19 9-17 1974 30 30 295-300 2015 4 4 1 2013 24 24 22-30 NOM-001-ECOL-1996 (Norma Of icial Mexicana) 1997 NOM-143-SEMARNAT-2003 (Norma Of icial Mexicana) 2005 NOM-138-SERMANAT/SSAI-2012 (Norma Oficial Mexicana) 2013 2015 15 15 13-20 2011 2014 32 32 301-9 2003 37 37 585-94 R Core Team 2015 2004 29 29 369-76 2012 14 14 518-29 2004 233-50 2006 27 27 767-76 1961 15 15 134-54 2014 71 71 125-59 2013 16 16 391-8 2004