0864-0394 0864-0394 S0864-03942020000400275 Costa Rica Universidad Técnica Nacional de Costa Rica 00 12 2020 00 12 2020 43 4 275 283

AOAC 1998 6th ed., 4th rev 2020 21 3 3 2018 2018 41 4 4 266-72 2015 2017 2018 22 1 1 31-42 2018 2017 28 2 2 405-26 2016 39 2 2 89-93 2017 28 2 2 329-40 2017 b 28 1 1 213-22 2017 a 28 2 2 357-70 2003 1999 31 2020 31 1 1 193-208 IMN 2020 2015 2018 2004 2015 61 58-73 2017 4 2 2 116-27 2016 14 1 1 135-44 2020 2008 26 3 3 339-41 1995 6 3 3 2015 27 10 10 2017 29 4 4 2015 XVII 74 74 14-21 2016 20 3 3 63-82 SAS Institute Inc 2009 2009 5 1 1 83-9 1985 1966 438-41 2011 12 5 5 1-13