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- Title
Determination of Zn in Dry Feeds for Cats and Dogs by Energy-Dispersive X-Ray Fluorescence Spectrometry.
- Authors
ÁVILA, DAYARA VIRGÍNIA L.; SOUZA, SIDNEI O.; COSTA, SILVÂNIO SILVÉRIO L.; ARAUJO, RENNAN GEOVANNY O.; GARCIA, CARLOS ALEXANDRE B.; ALVES, JOSÉ DO PATROCÍNIO H.; PASSOS, ELISANGELA A.
- 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.
- Subjects
CAT food; DOG food; ENERGY dispersive X-ray spectroscopy; OBSERVED confidence levels (Statistics); INDUCTIVELY coupled plasma mass spectrometry
- Publication
Journal of AOAC International, 2016, Vol 99, Issue 6, p1572
- ISSN
1060-3271
- Publication type
Article
- DOI
10.5740/jaoacint.16-0105