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Technical note: a procedure for the preparation and quantitative analysis of samples for titanium dioxide
W D Myers1, P A Ludden, V Nayigihugu
1Department of Animal Science, University of Wyoming, Laramie 82071-3684, USA.
Journal of Animal Science
|February 3, 2004
Summary
A new, rapid method accurately analyzes titanium dioxide (TiO2) in feed and fecal samples within 4.5 hours. This procedure offers superior TiO2 recovery compared to traditional dry-ash methods.
Area of Science:
- Analytical Chemistry
- Animal Nutrition
Background:
- Accurate determination of titanium dioxide (TiO2) is crucial for feed digestibility studies.
- Existing dry-ash methods for TiO2 analysis are time-consuming and can yield inaccurate results.
Purpose of the Study:
- To develop a rapid and accurate analytical procedure for titanium dioxide (TiO2) quantification.
- To compare the efficacy of the new method against a conventional dry-ash procedure.
Main Methods:
- Samples were digested using concentrated sulfuric acid (H2SO4) and hydrogen peroxide (H2O2).
- Absorbance was measured at 410 nm to determine TiO2 concentrations.
- A linear standard curve was established using spiked blanks.
Main Results:
- The developed procedure provided complete analysis within 4.5 hours.
- TiO2 recoveries averaged 96.7-98.5% across different organic matter sources.
- The new method significantly outperformed the dry-ash procedure, which yielded recoveries of 53.1-83.8%.
Conclusions:
- The novel digestion and spectrophotometric method is a rapid and accurate alternative for TiO2 determination.
- This procedure enhances the reliability of using TiO2 as an indigestible marker in animal nutrition studies.
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