Interaction of pyrophosphate with calcium phosphates
| Autor: | C. L. Howie-Meyers, K.P. Ananthapadmanabhan, D. L. Elliott, T.V. Vasudevan, Ponisseril Somasundaran |
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| Rok vydání: | 1994 |
| Předmět: |
Chemistry
Inorganic chemistry chemistry.chemical_element Calcium pyrophosphate Concentration effect Surfaces and Interfaces Calcium Condensed Matter Physics Pyrophosphate chemistry.chemical_compound Adsorption stomatognathic system Chemisorption Electrochemistry Zeta potential General Materials Science Brushite Spectroscopy |
| Zdroj: | Langmuir. 10:320-325 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la00013a047 |
| Popis: | Interactions of pyrophosphate (Pp) with hydroxyapatite (HAP), brushite, and calcium pyrophosphate (CaPP) have been studied using electrokinetic and ESCA measurements. PP adsorbs on HAP and brushite even when their surfaces are highly negatively charged. Importantly, the HAP zeta potential curves as a function of PP concentration show a precipitous drop in the low concentration range. Also, curves at different pH values show a progressive shift in the potential toward that of CaPP. These observations suggest the formation of CaPP on HAP surface and this has been further conflflDed by ESCA studies. Thus, adsorption on HAP appears to involve a surface precipitation or chemisorption followed by surface precipitation or surface reaction phenomenon. It is also suggested that in the case of brushite the dissolved calcium from the mineral competes for the PP and in turn reduces its adsorption. |
| Databáze: | OpenAIRE |
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