An improved dry ash procedure for the detection of titanium dioxide in cattle feces. (18th April 2013)

• Record Type: Journal Article
• Authors: Ohmori, Hideyuki; Nonaka, Itoko; Ohtani, Fumihiro; Tajima, Kiyoshi; Kawashima, Tomoyuki; KAJI, Yuji; Terada, Fuminori
• Is Part Of: Animal science journal. Volume 84:Number 11(2013:Nov.)
• Page Start: 726
• Page End: 731
• Publication Date: 2013-04-18
• Subjects: Animal culture -- Periodicals; Livestock -- Periodicals; 636
• DOI: 10.1111/asj.12068
• Languages: English
• ISSNs: 1344-3941

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <p>We improved the dry ash procedure for detecting titanium dioxide (TiO<sub>2</sub>) in cattle feces containing chromium dioxide (Cr<sub>2</sub>O<sub>3</sub>). First, the effect of amount of sodium sulfate (Na<sub>2</sub>SO<sub>4</sub>) on the recovery of TiO<sub>2</sub> from cattle feces that contained Cr<sub>2</sub>O<sub>3</sub> was evaluated. Average recovery of TiO<sub>2</sub> at the 2.5 g Na<sub>2</sub>SO<sub>4</sub> level was significantly higher (<italic>P</italic> < 0.0001) than that at 0.75 g Na<sub>2</sub>SO<sub>4</sub>. Second, the effect of Cr<sub>2</sub>O<sub>3</sub> concentration on the recovery of TiO<sub>2</sub> of cattle feces by using two levels of Na<sub>2</sub>SO<sub>4</sub> addition was examined. The recovery of TiO<sub>2</sub> decreased with the increase in the amount of Cr<sub>2</sub>O<sub>3</sub> at the 0.75 g Na<sub>2</sub>SO<sub>4</sub> level but was consistently high at 2.5 g Na<sub>2</sub>SO<sub>4</sub>. Third, the recovery of Cr<sub>2</sub>O<sub>3</sub> from cattle feces was checked. The recoveries of TiO<sub>2</sub> and Cr<sub>2</sub>O<sub>3</sub> were high enough at the 2.5 g Na<sub>2</sub>SO<sub>4</sub> level. Fourth, the improved dry ash procedure (5 mL of concentrated H<sub>2</sub>SO<sub>4</sub> and 2.5 g of Na<sub>2</sub>SO<sub>4</sub> were used for sample digestion) was compared to the wet ash procedure. Average recovery of TiO<sub>2</sub> by the improved dry ash procedure was significantly higher (<italic>P</italic> = 0.0077) than that by the wet ash procedure. Thus, the improved dry ash procedure can be used for TiO<sub>2</sub> analysis in cattle feces containing Cr<sub>2</sub>O<sub>3</sub>.</p> </abstract>