Determination of marker chromic oxide in faeces of grazing goats on Mediterranean shrublands by AAS

The most widely used external indicator for feed intake evaluation of grazing animals is Cr 2O 3. In this paper the combination of Cr 2O 3 dissolution by alkali fusion (Na 2O 2) with its determination by atomic absorption spectrophotometry (AAS) has been examined. Faecal samples were collected from...

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Bibliographic Details
Published inAnimal feed science and technology Vol. 67; no. 2; pp. 163 - 168
Main Authors Yiakoulaki, M.D., Papadoyannis, I.N., Nastis, A.S.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.07.1997
Subjects
AAS
Chromic oxide
Determination
Goats
Shrublands
Shrublands
Chromic oxide
AAS
Determination
Goats
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Summary:The most widely used external indicator for feed intake evaluation of grazing animals is Cr 2O 3. In this paper the combination of Cr 2O 3 dissolution by alkali fusion (Na 2O 2) with its determination by atomic absorption spectrophotometry (AAS) has been examined. Faecal samples were collected from four 2-year-old, meat-type, female, local goats grazing in a Mediterranean type shrubland in Northern Greece, for 5 consecutive days. Each composited sample from every animal and day was analysed eight times. There was very high linear correlation ( Y = 0.0024 + 0.01 X, r 2 = 0.99) between absorbance ( Y) (357.9 nm wavelength, 0.2 nm slit width) and Cr 2O 3 concentration ( X). The repeatability and reproducibility of the method was very satisfactory (CV ranged from 2.7 to 7.6%). The proposed method seems to be simple, inexpensive and precise for routine determination of Cr 2O 3 in faeces of grazing animals in which Cr 2O 3 is used as a reference marker.
ISSN:0377-8401
1873-2216
DOI:10.1016/S0377-8401(96)01134-0