For this determination, Kjeldahl nitrogen method was used. One gram (1.0gm) of sample was introduced into the digestion flask. Kjedahl catalyst (5 selenium tablets) tablets were added to the samples. Twenty milliliters of concentrated sulphuric acid (20ml) was added to each sample and fixed into the digester for 8hr until a clear solution was obtained. The cooled digest was transferred into 100ml volumetric flask and made up to the mark with distilled water