Freeze-drying yields stable and pure amorphous calcium carbonate (ACC).

Freeze-drying yields stable and pure amorphous calcium carbonate (ACC).

Chemical communications (Cambridge, England) (2013-03-13)

Johannes Ihli, Alexander N Kulak, Fiona C Meldrum

RÉSUMÉ

A simple synthetic method is presented for the precipitation of high purity, dry amorphous calcium carbonate (ACC) based on freeze-drying saturated, counter ion free CaCO3 solutions, where the ACC produced shows an extended atmospheric stability. Translation of the methodology to amorphous calcium phosphate demonstrates the generality of the approach.

MATÉRIAUX

Référence du produit

Marque

Description du produit

239216

Sigma-Aldrich

Carbonate de calcium, ACS reagent, ≥99.0%, powder

12010

Sigma-Aldrich

Carbonate de calcium, puriss., meets analytical specification of Ph. Eur., BP, USP, FCC, E170, precipitated, 98.5-100.5% (based on anhydrous substance)

310034

Sigma-Aldrich

Carbonate de calcium, powder, ≤50 μm particle size, 98%

C6763

Sigma-Aldrich

Carbonate de calcium, ReagentPlus^®

398101

Sigma-Aldrich

Carbonate de calcium, ACS reagent, chelometric standard, 99.95-100.05% dry basis

481807

Sigma-Aldrich

Carbonate de calcium, 99.999% trace metals basis