Table 1

Analytical data for the dissolution of 2 mg calcium pyrophosphate dihydrate crystals in different polyphosphate samples

Dissolving solution1-150 DA values1-151 (SD) (Ca2+ μg/ml) Dissolution (%)
1.5 mg SMP1-152/ml24.1 (3)21.9
1.5 mg TSMP1-152/ml1.6 (0.5)1.5
2.3 mg PSTP1-152/ml21.7 (4.3)19.7
  • 1-150 The amount of the polyphosphates corresponds to a concentration of 14.7 mM phosphate in phosphate buffered saline (280–300 mmol/kg, pH 7.4).

  • 1-151 Dissolving ability (DA) values were expressed as concentrations of calcium ions present in solution after one hour of incubation at 37°C.

  • 1-152 SMP = sodium metaphosphate; TSMP = trisodium metaphosphate; PSTP = pentasodium tripolyphosphate.