Evaluation of acid digestion techniques to estimate chromium contents in cattle feces

• Author(s): Rocha,Gabriel Cipriano ; Palma,Malber Nathan Nobre ; Detmann,Edenio ; Valadares Filho,Sebastião de Campos
• Date: 2015
• Origin: Oasisbr
• Subject(s): chromic oxide; chromium recovery; markers.
• Document Type: Report
• Language: English

Description

The objective of this work was to evaluate the accuracy of digestion techniques using nitric and perchloric acid at the ratios of 2:1, 3:1, and 4:1 v v-1, in one- or two-step digestion, to estimate chromium contents in cattle feces, using sodium molybdate as a catalyst. Fecal standards containing known chromium contents (0, 2, 4, 6, 8, and 10 g kg-1) were produced from feces of five animals. The chromium content in cattle feces is accurately estimated using digestion techniques based on nitric and perchloric acids, at a 3:1 v v-1 ratio, in one-step digestion, with sodium molybdate as a catalyst.