Article: Solubility of TTCP and β-TCP by solid titration
| Title | Solubility of TTCP and β-TCP by solid titration |
|---|---|
| Authors | Pan, HB1 Darvell, BW1 |
| Keywords | β-TCP Solid titration Solubility TTCP |
| Issue Date | 2009 |
| Publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/archoralbio |
| Citation | Archives Of Oral Biology, 2009, v. 54 n. 7, p. 671-677 [How to Cite?] DOI: http://dx.doi.org/10.1016/j.archoralbio.2008.01.001 |
| Abstract | Objective: Using solid titration with hydroxyapatite (HAp) and octacalcium phosphate, HAp has been found to be more stable than dicalcium phosphate dihydrate (DCPD) even at lower pH, inconsistent with the widely reported view that DCPD is less soluble than other calcium phosphates below pH 4.2. A check of the behaviour of other calcium phosphates (TTCP; Ca/P: 2.00 and β-TCP; Ca/P: 1.33) is necessary. Methods: Solid titration was used to determine the effective solubility of TTCP and β-TCP in 100 mM KCl solution at 37.0 ± 0.1 °C for pH ∼2.9-9.2 and ∼3-7.4 respectively. The constitution of the precipitate was determined by XRD, particle morphology was observed by SEM and TEM, and the precipitate Ca/P ratio was calculated by EDX. Results: The only identified solid phase at equilibrium was HAp at both pH 3.60 and 4.50; no residual titrant or other phases were detected. A marked change of slope in the curve occurred at pH ∼3.9 for TTCP. Conclusion: HAp was verified to be more stable than other calcium phosphates, especially at lower pH. That DCPD is more stable below pH 4.2 is contradicted. © 2008 Elsevier Ltd. All rights reserved. |
| ISSN | 0003-9969 2011 Impact Factor: 1.603 2011 SCImago Journal Rankings: 0.095 |
| DOI | http://dx.doi.org/10.1016/j.archoralbio.2008.01.001 |
| References | References in Scopus |
| dc.contributor.author | Pan, HB | ||||
|---|---|---|---|---|---|
| dc.contributor.author | Darvell, BW | ||||
| dc.date.accessioned | 2011-11-02T03:06:20Z | ||||
| dc.date.available | 2011-11-02T03:06:20Z | ||||
| dc.date.issued | 2009 | ||||
| dc.description.abstract | Objective: Using solid titration with hydroxyapatite (HAp) and octacalcium phosphate, HAp has been found to be more stable than dicalcium phosphate dihydrate (DCPD) even at lower pH, inconsistent with the widely reported view that DCPD is less soluble than other calcium phosphates below pH 4.2. A check of the behaviour of other calcium phosphates (TTCP; Ca/P: 2.00 and β-TCP; Ca/P: 1.33) is necessary. Methods: Solid titration was used to determine the effective solubility of TTCP and β-TCP in 100 mM KCl solution at 37.0 ± 0.1 °C for pH ∼2.9-9.2 and ∼3-7.4 respectively. The constitution of the precipitate was determined by XRD, particle morphology was observed by SEM and TEM, and the precipitate Ca/P ratio was calculated by EDX. Results: The only identified solid phase at equilibrium was HAp at both pH 3.60 and 4.50; no residual titrant or other phases were detected. A marked change of slope in the curve occurred at pH ∼3.9 for TTCP. Conclusion: HAp was verified to be more stable than other calcium phosphates, especially at lower pH. That DCPD is more stable below pH 4.2 is contradicted. © 2008 Elsevier Ltd. All rights reserved. | ||||
| dc.description.nature | link_to_subscribed_fulltext | ||||
| dc.identifier.citation | Archives Of Oral Biology, 2009, v. 54 n. 7, p. 671-677 [How to Cite?] DOI: http://dx.doi.org/10.1016/j.archoralbio.2008.01.001 | ||||
| dc.identifier.citeulike | 5347238 | ||||
| dc.identifier.doi | http://dx.doi.org/10.1016/j.archoralbio.2008.01.001 | ||||
| dc.identifier.epage | 677 | ||||
| dc.identifier.isi | WOS:000267480800009
Funding Information: This work was done in partial-fulfilment of the requirements for the degree of Ph.D. for Haobo Pan at and supported by the Faculty of Dentistry, The University of Hong Kong. The authors thank P.K.D. Lee and T.D.B. Yuen for technical support; F. Chan for TEM observation; and G-F. Chen for XRD analysis. | ||||
| dc.identifier.issn | 0003-9969 2011 Impact Factor: 1.603 2011 SCImago Journal Rankings: 0.095 | ||||
| dc.identifier.issue | 7 | ||||
| dc.identifier.pmid | 19414172 | ||||
| dc.identifier.scopus | eid_2-s2.0-67349254691 | ||||
| dc.identifier.spage | 671 | ||||
| dc.identifier.uri | http://hdl.handle.net/10722/143140 | ||||
| dc.identifier.volume | 54 | ||||
| dc.language | eng | ||||
| dc.publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/archoralbio | ||||
| dc.publisher.place | United Kingdom | ||||
| dc.relation.ispartof | Archives of Oral Biology | ||||
| dc.relation.references | References in Scopus | ||||
| dc.subject | β-TCP | ||||
| dc.subject | Solid titration | ||||
| dc.subject | Solubility | ||||
| dc.subject | TTCP | ||||
| dc.title | Solubility of TTCP and β-TCP by solid titration | ||||
| dc.type | Article |
Author Affiliations
- The University of Hong Kong