Kinetics of Dissolution of β-Tricalcium Phosphate

Isolation of phosphate solubilizing bacteria and their potential for lead immobilization in soil

“…Bohner et al [42] proposed diffusion controlled dissolution kinetics for Ca 3 (PO 4 ) 2 in aqueous medium. They showed that the logarithm of the dissolution rate (k s ; mmol m −2 s −1 ) is a linear function of the pH at zero saturation of Ca 2+ and PO 4 3− ions in initial solution (Eq.…”

Interlaboratory studies on in vitro test methods for estimating in vivo resorption of calcium phosphate ceramics

“…Note that a difference of 1.0 in pH gives a difference of 660% in initial dissolution rate of TCP [27]. Therefore, the relative dissolution rate can be a useful standard index that is used regardless of a wide range of differences in dissolution condition.…”

“…The continuous measurement techniques include the constant composition method [24][25][26], the constant pH method [27] and other methods using electrodes [28]. The discontinuous measurement techniques include pharmacopoeia methods such as the BP (British Pharmacopoeia) and USP (United States Pharmacopeia) methods and other intermittent sampling-and-analysis methods [29,30].…”

A model for biodegradation of composite materials made of polyesters and tricalcium phosphates

“…Defining a dissolution flux J as the mole of TCP molecules dissolved off a unit area of the particle surface per unit time, then J can be related to s. Many expressions for the J-s relationship have been proposed depending on the controlling mechanism of the particle dissolution [25,26]. Here a power law is adopted for its simplicity without losing the general validity because power law is a good approximation of many other expressions:…”

“…The size of the particle is a function of time and can be calculated from the current molar concentration of Ca 2þ such that (25) in which C cp;solid is the molar concentration of calcium phosphate in the solid state. k 1 reflects the relative rate of the uncatalytic hydrolysis to the auto-catalytic hydrolysis, which will be referred to as the strength of the uncatalytic hydrolysis in this paper.…”