A capillary zone electrophoresis study of the effect of precursors and ultrasonic treatment on the morphology of hydroxyapatite particles

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• 作者：T. G. Dzherayan ; N. G. Vanifatova ; I. V. Fadeeva…
• 关键词：calcium hydroxyapatite ; ultrasound ; capillary zone electrophoresis ; scanning electron microscopy ; dynamic light scattering ; static light scattering
• 刊名：Journal of Analytical Chemistry
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：70
• 期：5
• 页码：608-614
• 全文大小：507 KB
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• 作者单位：T. G. Dzherayan (1)
  N. G. Vanifatova (1)
  I. V. Fadeeva (2)
  R. Kh. Dzhenloda (1)
  A. A. Burmistrov (1)
  A. V. Rudnev (1)
  A. S. Fomin (2)
  
  1. Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991, Russia
  2. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991, Russia
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Analytical Chemistry
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3199

文摘

A set of analytical techniques is proposed for studying samples of calcium hydroxyapatite (HA) synthesized on the basis of calcium nitrate or calcium hydroxide as precursors. A comparative study of particle size distribution in HA samples is performed using capillary zone electrophoresis (CZE), scanning electron microscopy (SEM), dynamic light scattering (DS), and static light scattering (SS). The effect of heat treatment on the morphology of the synthesized products is evaluated. It is found that the effect of ultrasound (US) on the dispersity of HA particles in aqueous suspensions depends on the nature of the precursor and heat treatment. It is shown that the HA particles synthesized from calcium hydroxide (HA-OH) aggregate more rapidly than the particles synthesized from calcium nitrate (HA-NO ₃ ). After the ultrasonic treatment of suspensions, the relative concentration of large HA-NO₃ submicroparticles increased, while particle size distribution in the suspension of HA-OH remained virtually the same. The heat treatment of HA powders at 900°C reduced the ability of particles to aggregate. It is found by CZE that, with increasing time of ultrasonication of suspensions, the relative concentration of nanoscaled and similar in size HA-NO₃ submicroparticles increased markedly, while it changed only slightly in the HA-OH suspension. The reasons for the differences are discussed. A procedure for determining the concentration of HA submicroparticles in suspension by CZE is proposed. A linear dependence of normalized peak areas on HA concentration in suspension is obtained.