title: Validation of a sampling plan to generate food composition data.
abstract: A methodology to develop systematic plans for food sampling was proposed. Long life whole and skimmed milk, and sunflower oil were selected to validate the methodology in Argentina. Fatty acid profile in all foods, proximal composition, and calcium's content in milk were determined with AOAC methods. The number of samples (n) was calculated applying Cochran's formula with variation coefficients ⩽12% and an estimate error (r) maximum permissible ⩽5% for calcium content in milks and unsaturated fatty acids in oil. n were 9, 11 and 21 for long life whole and skimmed milk, and sunflower oil respectively. Sample units were randomly collected from production sites and sent to labs. Calculated r with experimental data was ⩽10%, indicating high accuracy in the determination of analyte content of greater variability and reliability of the proposed sampling plan. The methodology is an adequate and useful tool to develop sampling plans for food composition analysis.
authors.affiliation: Departamento de Agroindustrias, Facultad de Ingeniería, Universidad Nacional de Jujuy, Avenida Italia esq. Martiarena, 4600 Jujuy, Argentina. Electronic address: nsamman@fi.unju.edu.ar.
authors.forename: N C
authors.initials: NC
authors.lastname: Sammán
authors.affiliation: Departamento de Agroindustrias, Facultad de Ingeniería, Universidad Nacional de Jujuy, Avenida Italia esq. Martiarena, 4600 Jujuy, Argentina.
authors.forename: M A
authors.initials: MA
authors.lastname: Gimenez
authors.affiliation: Instituto de Química Biológica, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán - CONICET, Argentina.
authors.forename: N
authors.initials: N
authors.lastname: Bassett
authors.affiliation: Departamento de Agroindustrias, Facultad de Ingeniería, Universidad Nacional de Jujuy, Avenida Italia esq. Martiarena, 4600 Jujuy, Argentina.
authors.forename: M O
authors.initials: MO
authors.lastname: Lobo
authors.affiliation: Departamento de Agroindustrias, Facultad de Ingeniería, Universidad Nacional de Jujuy, Avenida Italia esq. Martiarena, 4600 Jujuy, Argentina.
authors.forename: M E
authors.initials: ME
authors.lastname: Marcoleri
mesh_terms: D000818:Animals; D001118:Argentina; D002118:Calcium / Q000032:analysis; D005227:Fatty Acids / Q000032:analysis; D005231:Fatty Acids, Unsaturated / Q000032:analysis; D005504:Food Analysis / Q000379:methods*; D008892:Milk / Q000737:chemistry; D010938:Plant Oils / Q000737:chemistry; D015203:Reproducibility of Results; D000074242:Sunflower Oil
chemical_list: D005227:Fatty Acids; D005231:Fatty Acids, Unsaturated; D010938:Plant Oils; D000074242:Sunflower Oil; D002118:Calcium
keywords: Food composition; Methodology validation; Sampling plan; Variability