Slow lactate gluconate exchange in calcium complexes during precipitation from supersaturated aqueous solutions.
Calcium hydroxycarboxylates
Kinetic modelling
Supersaturation
Journal
Food research international (Ottawa, Ont.)
ISSN: 1873-7145
Titre abrégé: Food Res Int
Pays: Canada
ID NLM: 9210143
Informations de publication
Date de publication:
11 2020
11 2020
Historique:
received:
25
05
2020
revised:
22
06
2020
accepted:
09
07
2020
entrez:
25
11
2020
pubmed:
26
11
2020
medline:
11
5
2021
Statut:
ppublish
Résumé
Saturated solutions of calcium l-lactate in water or in deuterium oxide continuously dissolve calcium l-lactate by addition of solid sodium d-gluconate and become strongly supersaturated in calcium d-gluconate due to no or slow precipitation. The quantification of total dissolved calcium allied with the calcium complexes equilibrium constants allowed an ion speciation, which shows an initial non-thermal and spontaneous supersaturation of more than a factor of 50 at 25 °C only slowly decreasing after initiation of precipitation of calcium d-gluconate after a lag phase of several hours. A mathematical model is proposed, based on numerical solution of coupled differential equations of dynamics of l-lactate and d-gluconate exchange during the lag phase for precipitation and during precipitation. A slow exchange of l-lactate coordinated to calcium with d-gluconate is indicated with a time constant of 0.20 h
Identifiants
pubmed: 33233167
pii: S0963-9969(20)30564-0
doi: 10.1016/j.foodres.2020.109539
pii:
doi:
Substances chimiques
Gluconates
0
Water
059QF0KO0R
Lactic Acid
33X04XA5AT
gluconic acid
R4R8J0Q44B
Calcium
SY7Q814VUP
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
109539Informations de copyright
Copyright © 2020 Elsevier Ltd. All rights reserved.