0188-6266 0188-6266 S0188-62662019000100191 10.15174/au.2019.2197 Mexico Mexico Mexico Mexico Mexico 00 00 2019 00 00 2019 29

1998 42 1 1 1-11 Association of Official Analytical Chemists 1990 1999 81 4 4 263-72 2006 44 3 3 379-88 1991 360-88 2002 40 2 2 193-205 2009 41 1 1 17-24 2004 84 4 4 291-4 1973 2001 91 1-2 1-2 83-93 2001 91 1-2 1-2 3-20 1995 73 5 5 1516-28 Statistical Analysis Software 2002 2002 2001 91 1-2 1-2 69-81 1992 58 3 3 321-9 1991 74 10 10 3583-97