HPO42− Content in enamel and artificial carious lesions
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- Arends, J. & Davidson, C.L. Calc. Tis Res. (1975) 18: 65. doi:10.1007/BF02546227
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The HPO42− and CO32− content was determined in sound enamel and in material collected from artificially produced carious lesions. The method described shows that the HPO42− content can be determined from the 875 cm−1 infrared absorption band if correction for the CO32− contribution are made. The I. R. spectra show that the HPO42− content in sound human or bovine enamel is about 5% by weight. In artificially produced carious lesions (pH=4.0), the HPO42− content is in the order of 15 wt%. Most likely, the HPO42− ions in sound and carious enamel have a different environment.