What You Need to Know
Involves adjusting pH with citrate or other acids to modulate sodium alginate's affinity for calcium ions, delaying gelation for precise spherification. The citrate chelates calcium, controlling cross-linking kinetics.
Enables creation of liquid-center spheres with controlled membrane thickness and burst timing.
Key Parameters
Temperature
15°C
4°C - 25°C
Time
90 seconds
30 seconds - 5 minutes
Equipment
pH meter (±0.01 precision)Syringe/dropperCalcium chloride bathDistilled water rinse
Steps
- 1.
Olive Oil Spheres (elBulli 2003): Prevents premature gelation of high-acid EVOO
- 2.
Balsamic Caviar (WD-50): Allows vinegar encapsulation without immediate membrane failure
The Science
Primary Reaction
Ionic cross-linking of guluronate blocks (G-blocks) in alginate with Ca²⁺