title: Determination of Zn in Dry Feeds for Cats and Dogs by Energy-Dispersive X-Ray Fluorescence Spectrometry.
abstract: This work describes an analytical method for Zn determination in dry feeds for cats and dogs by energy-dispersive X-ray fluorescence (EDXRF). Samples of dry feed were powdered and prepared in the form of pellets for direct analysis by EDXRF. The LOQ (10σ) was 0.4 mg/kg. The samples were also analyzed by inductively coupled plasma-optical emission spectrometry (ICP-OES) as an independent comparative method. Application of a paired t-test showed no significant differences between Zn concentrations obtained by EDXRF and ICP-OES (at a 95% confidence level). Analysis of variance was also applied to the results and revealed no significant differences between the two techniques (at a 95% confidence level). The precision, expressed as the RSD (n = 3), was RSD < 4.55%. This analytical method provides a simple, rapid, accurate, and precise determination of Zn in dry feeds for cats and dogs by EDXRF as direct, solid-sample analysis.
authors.affiliation: Universidade Federal de Sergipe, Centro de Ciências Exatas e Tecnologia, Departamento de Química, Laboratório de Química Analítica Ambiental, 49100-000 São Cristóvão (SE), Brazil.
authors.forename: Dayara Virgnía L
authors.initials: DV
authors.lastname: Ávila
authors.affiliation: Universidade Federal de Sergipe, Centro de Ciências Exatas e Tecnologia, Departamento de Química, Laboratório de Química Analítica Ambiental, 49100-000 São Cristóvão (SE), Brazil.
authors.forename: Sidnei O
authors.initials: SO
authors.lastname: Souza
authors.affiliation: Universidade Federal de Sergipe, Centro de Ciências Exatas e Tecnologia, Departamento de Química, Laboratório de Química Analítica Ambiental, 49100-000 São Cristóvão (SE), Brazil.
authors.forename: Silvânio Silvério L
authors.initials: SS
authors.lastname: Costa
authors.affiliation: Universidade Federal de Sergipe, Centro de Ciências Exatas e Tecnologia, Departamento de Química, Laboratório de Química Analítica Ambiental, 49100-000 São Cristóvão (SE), Brazil.
authors.forename: Rennan Geovanny O
authors.initials: RG
authors.lastname: Araujo
authors.affiliation: Universidade Federal de Sergipe, Centro de Ciências Exatas e Tecnologia, Departamento de Química, Laboratório de Química Analítica Ambiental, 49100-000 São Cristóvão (SE), Brazil.
authors.forename: Carlos Alexandre B
authors.initials: CA
authors.lastname: Garcia
authors.affiliation: Universidade Federal de Sergipe, Centro de Ciências Exatas e Tecnologia, Departamento de Química, Laboratório de Química Analítica Ambiental, 49100-000 São Cristóvão (SE), Brazil.
authors.forename: José do Patrocínio H
authors.initials: JD
authors.lastname: Alves
authors.affiliation: Universidade Federal de Sergipe, Centro de Ciências Exatas e Tecnologia, Departamento de Química, Laboratório de Química Analítica Ambiental, 49100-000 São Cristóvão (SE), Brazil.
authors.forename: Elisangela A
authors.initials: EA
authors.lastname: Passos
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D002415:Cats; D004043:Dietary Fiber / Q000032:analysis*; D004285:Dogs; D013052:Spectrometry, X-Ray Emission; D015032:Zinc / Q000032:analysis*
chemical_list: D004043:Dietary Fiber; D015032:Zinc