What You Need to Know
Utilizes calcium-induced gelation of alginate at oil-water interfaces. Sodium alginate dissolves in aqueous phase while calcium ions (typically from calcium lactate or chloride) trigger polymerization at the interface when oil droplets are submerged in the bath. The reaction forms a semi-permeable membrane through ionic cross-linking of guluronic acid residues.
Creates caviar-like oil pearls that burst in the mouth. Used for flavor encapsulation in dressings, infused oils, or as garnishes. Requires precise control of viscosity, pH, and ion concentration to achieve proper membrane thickness without premature gelation.
Key Parameters
Temperature
°C - °C
Time
1-2 min
30 sec - 5 min
Equipment
Syringe/dropper for droplet formationCalcium bath containerFine mesh strainerpH meterImmersion blender for alginate hydration
Steps
- 1.
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- 2.
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The Science
Primary Reaction
Ionic gelation of alginates