1659-4266

S1659-42662020000100065

10.22458/urj.v12i1.2811

Costa Rica

00 06 2020

12 1 65 74

2006

Association of Official Analytical Chemist (AOAC) 1991

2018 36

2018

2006

2018 6 (3) (3)

134-47

2017

2018 36

2014 61 (1) (1)

64-82

2018 6 (4) (4)

415-21

1978

2000 48 (2) (2)

231-8

INEC (Instituto Nacional de Estadísticas y Censos) 2015

2010 59 (228) (228)

561-70

NRC (National Research Council) 2001 (7th Ed.)

2017

2002 42

2049-54

2007

SAS 2011

2005 34

164-73

2006

2013 37

91-101

2013 37 (2) (2)

91-103

2009 20 (2) (2)

369-77

2018 23 (11) (11)

2840