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Preparation and Comprehensive Characterization of a Calcium Hydroxyapatite Reference Material.

Milenko Markovic1, Bruce O Fowler2, Ming S Tung1

  • 1American Dental Association Foundation, Paffenbarger Research Center, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.

Journal of Research of the National Institute of Standards and Technology
|July 2, 2016
PubMed
Summary
This summary is machine-generated.

This study details the comprehensive physicochemical characterization of calcium hydroxyapatite (HA), a crucial material in biological and chemical research. The findings confirm its high purity, crystallinity, and suitability as a NIST standard reference material.

Keywords:
Ramanchemical analysiscrystal sizecrystallinityhydroxyapatiteinfraredmorphologypreparationsolubilitysurface areathermal analysisunit-cell parametersx-ray diffraction

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Area of Science:

  • Materials Science
  • Biomaterials Science
  • Chemistry

Background:

  • Calcium hydroxyapatite (Ca10(PO4)6(OH)2) is extensively utilized in various scientific disciplines.
  • Understanding its precise properties is crucial for reliable experimental outcomes.

Purpose of the Study:

  • To conduct a detailed physicochemical characterization of calcium hydroxyapatite (HA).
  • To certify HA as a National Institute of Standards and Technology (NIST) standard reference material (SRM 2910).

Main Methods:

  • Employing a suite of analytical techniques including chemical and thermal analyses, X-ray diffraction, infrared and Raman spectroscopies.
  • Utilizing scanning and transmission electron microscopy, and the Brunauer, Emmett, and Teller (BET) surface-area method.

Main Results:

  • Determined elemental composition (Ca2+, PO4 3-, OH-, HPO4 2-, H2O, CO3 2-, trace elements) and Ca/P molar ratio.
  • Characterized crystal size, morphology, surface area, unit-cell parameters, crystallinity, and solubility.
  • Confirmed high purity, homogeneity, and high crystallinity of the synthesized HA.

Conclusions:

  • The characterized calcium hydroxyapatite meets the stringent requirements for a NIST standard reference material.
  • This certified HA (SRM 2910) will serve as a reliable standard for future research and applications.