scholarly journals IMPROVED BONE STANDARD CONTAINING DIPOTASSIUM HYDROGEN PHOSPHATE SOLUTION FOR THE INTERCOMPARISON OF DIFFERENT TRANSMISSION BONE SCANNING SYSTEMS.

1971 ◽  
Author(s):  
R.M. Witt ◽  
J.R. Cameron
Keyword(s):  
Phosphate Solution ◽  
Bone Scanning ◽  
Hydrogen Phosphate ◽  
Dipotassium Hydrogen Phosphate ◽  
Scanning Systems

scholarly journals Synthesis of Hydroxyapatite by Interfacial Reaction in a Multiple Emulsion

2007 ◽  
Vol 2007 ◽  
pp. 1-4 ◽  
Author(s):  
Isao Kimura
Keyword(s):  
Interfacial Reaction ◽  
Aqueous Phase ◽  
Single Phase ◽  
Nitrate Solution ◽  
Calcium Nitrate ◽  
Phosphate Solution ◽  
Multiple Emulsion ◽  
Hydrogen Phosphate ◽  
Dipotassium Hydrogen Phosphate ◽  
Initial Ph

Interfacial reaction in a multiple emulsion, which is one of methods for producing inorganic microspheres, was applied to synthesize hydroxyapatite. The multiple emulsion was a W/O/W emulsion, made of dipotassium hydrogen phosphate solution as an inner aqueous phase, benzene as an oil phase, and calcium nitrate solution as an outer aqueous phase. The reaction was carried out in the multiple emulsion for 24 hours at 323 K. The crystalline phase was varied with an initial pH of the inner aqueous phase, and single phase hydroxyapatite was synthesized at an initial pH of 12. The products were composed of porous microspheres of less than 3 μm in size. The microspheres were composed of nanospheres of less than 120 nm in size. By considering the mass balance, it was suggested that each nanosphere was formed in an inner aqueous phase droplet.

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