Determination of Metal Concentration in Fat Supplements for Swine Nutrition by Atomic Absorption Spectroscopy
| Autor: | Matteo Manfredini, Daniela Manzini, Valerio Faeti, Marina Cocchi, Andrea Marchetti, Simona Sighinolfi |
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| Rok vydání: | 2005 |
| Předmět: |
AAS
metals swine fat chemometrics PCA ANOVA Swine Microwave oven Analytical chemistry Analytical Chemistry law.invention Chemometrics law Animals Environmental Chemistry Pharmacology Principal Component Analysis Reproducibility Chemistry Spectrophotometry Atomic Reproducibility of Results Repeatability Reference Standards Animal Feed Dietary Fats Certified reference materials Metals Standard addition Dietary Supplements Indicators and Reagents Graphite furnace atomic absorption Atomic absorption spectroscopy Agronomy and Crop Science Food Science |
| Zdroj: | ResearcherID |
| ISSN: | 1944-7922 1060-3271 |
| DOI: | 10.1093/jaoac/88.2.393 |
| Popis: | The presence of some essential and toxic metals in fat supplements for swine diet was investigated. Collected samples represented a relevant production of the Italian industry. In particular, some samples were enriched with antioxidants or waste cooking oils. The method for the determination of Ca, Cu, Cd, Fe, Mg, Mn, Ni, Pb, and Zn in fat samples was developed by means of a certified reference material (CRM 186) and a representative fatty sample (RFS). All samples were digested in closed vessels in a microwave oven and then analyzed by flame atomic absorption or graphite furnace atomic absorption spectrometry. The entire analytical method provided a satisfactory repeatability and reproducibility confirmed by agreement between the experimental recovery data obtained for the CRM 186 sample and, with the method of standard additions, for the RFS material. The samples generally showed a small amount of metals compared with the recommended daily intake for the essential elements. On the other hand, some samples contained a significant concentration, from an analytical point of view, of Cd, Ni, and Pb. Principal component analysis (PCA) was applied to inspect the experimental data obtained from samples analysis. Basically no differences were detected in terms of metal concentration among the fat supplements analyzed. |
| Databáze: | OpenAIRE |
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