Comparison of Calcium Content in Different Calcium Products by Rapid Calcium-Holding Activity in Vitro and Atomic Absorption Spectrometry
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Abstract:
Casein phosphopeptide (CPP), hydrolyzed and separated from milk casein, was a bioactive peptide and had a strong calcium absorption activity. The inhibition of calcium phosphate/calcium carbonate precipitation was investigated by CPP to characterize the calcium-holding effect of CPP in the present study. The calcium-holding activity of three commercial calcium tablets was investigated by rapid demonstration experiments in vitro, and the comparison of calcium content was determined by atomic absorption spectrometry. The results showed that the CPP-containing calcium tablets had an obvious advantage of calcium-holding and prevented calcium phosphate/calcium carbonate from precipitating for more than 30 minutes. In addition, the precipitation of CPP-containing calcium tablets was significantly less than the other two calcium products under the conditions of same calcium tablets content and calcium content while greatly more than the other two calcium tablets after treated with sodium carbonate solution, indicating that the CPP-containing calcium tablets had a significant effect on prolonging time calcium-holding and inhibiting the formation of calcium carbonate precipitation. The results of this study provided a reasonable scientific support for the calcium supplement effect of commercial calcium products and had a great guiding significance to the stable development of the health care industry.
