References
Arthur, D. (1970) The determination of chromium in animal feed and excreta by atomic absorption
spectrophotometry. Canadian Journal of Spectroscopy15, 134–140.
Balcells, J., Guada, J.A., Peiró, J.M. and Parker, D.S. (1992) Simultaneous determination of allantoin
and oxypurines in biological fluids by high-performance liquid chromatography. Journal of
Chromatography575, 153–157.
272 J.P. Marais
Fig. 12.1.(A) Relationship between the known proportions of kikuyu (Pennisetum clandestinum) and
plantain (Plantago lanceolata) in herbage mixtures and the proportions predicted from the alkane
concentrations of the component species and their mixtures. (B) Proportions of the rush Juncus effusus
in the diet of goats fed mixtures of Juncusand Lolium perenne(data from Dove and Mayes, 1996), faecal
recoveries estimated by dosing goats with C 24 , C 28 , C 32 and C 36 alkanes. Solid lines are the 1:1 lines.