0185-3880 0185-3880 S0185-38802015000300247 10.7773/cm.v41i3.2526 Mexico Mexico Mexico 00 00 2015 00 00 2015 41 3 247 254

Association of Official Analytical Chemists 1995 1 684 2012 69 2001 131C 411-23 2001 15 121-5 2011 63 1-21 1990 84 41-8 2011 42 3 3 388-98 2006 95-106 2010 35 2012 32 1 1 16-23 2001 354-75 2003 34 581-4 2013 44 4 4 645-56 1997 51 886-94 2005 247 1 1 189-201 2002 205 1153-60 2011 60 232 232 985-95 2003 2002 33 1 1 39-48 2002 213 339-46 2004 35 9 9 912-4 2005 32 93-105 2012 43 9 9 1372-83 1989 2 91-7 2014 14 515-25 2007 272 1 1 146-55 2015 66-7 1999 173 161-70 2005 85 3 3 333-9 2012 14 2 2 11-7 1989 81 119-27 1992 310 2008 148 4 4 419-29 1988 515-23