Abstract: Purity and calcium content of three phosvitin phosphopeptides-calcium samples were analyzed using the detection methods of routine ingredient analysis and atomic absorption. Comparison of sample pretreated using carboxymethyl cellulose with the calglucon as one kind of calcium-supplementing product in the market was conducted to determine the calcium-absorbing rate in mice during growing period. The results indicated that:(1) Both the purity and calcium-absorbing rate of PPP3-calcium sample are the highest one among the three samples;(2) There is no significant difference during growing period among the three samples;(3) The mice in the PPP3-calcium group with the highest calcium content have the highest calcium-absorbing rate,which shows that there are significant differences in comparison with the blank and control group(p<0.05). The order of the groups in the calcium-absorbing rate is as follows:the middle group of PPP3-calcium>middle group of PPP2-calcium>middle group of PPP1-calcium>low group of PPP3-calcium. All the groups show significant difference from the blank group.

Key words: phosvitin phosphopeptides, mouse, apparent absorptivity