التفاصيل البيبلوغرافية
| العنوان: |
Technical Note: A procedure for the preparation and quantitative analysis of samples for titanium dioxide. |
| المؤلفون: |
Myers, W.D.1, Ludden, P.A.1 ludden@uwyo.edu, Nayigihugu, V.1, Hess, B.W.1 |
| المصدر: |
Journal of Animal Science. Jan2004, Vol. 82 Issue 1, p179-183. 5p. 2 Charts, 4 Graphs. |
| مصطلحات موضوعية: |
*TITANIUM dioxide, *OXIDES, *ANIMAL feeds, *DIGESTION, *BIOMARKERS, *ANIMAL nutrition |
| مستخلص: |
A procedure was developed for the rapid analysis of titanium dioxide (TiO[sub 2]) concentrations in feed and fecal samples. Samples were digested in concentrated H[sub 2]SO[sub 4] for q h, followed by addition of 30% H[sub 2]O[sub 2], and absorbance was measured at 410 nm. Standards were prepared by spiking blanks with increasing amounts of TiO[sub 2], resulting in a linear standard curve. Complete analysis using this procedure can typically be accomplished within 4.5 h. This procedure was compared to a previously published dry-ash procedure for the analysis of TiO[sub 2] in bovine fecal samples. Three sources of OM devoid of TiO[sub 2] (a forage sample, a bovine fecal sample without Cr[sub 2]O[sub 3], and a bovine fecal sample containing Cr[sub 2]O[sub 3]) were spiked with graded amounts (0, 2, 4, 6, 8, or 10 mg) of TiO[sub 2]. With our procedure, TiO[sub 2] recoveries averaged 96.7, 97.5, and 98.5%, for the three OM sources, respectively, vs. 74.3, 83.8, and 53.1% for the same samples analyzed using the dry-ash method. These results suggest that our procedure is a rapid and accurate alternative to dry-ash procedures for the determination of TiO[sub 2]. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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