Description
Detoxifies calcium oxalate-rich plants through acid-mediated dissolution of raphide crystals.
Technical
Utilizes weak organic acids (oxalic, citric) to solubilize insoluble calcium oxalate crystals via proton exchange and chelation. Secondary enzymatic hydrolysis of cyanogenic glycosides may occur concurrently.
Culinary Significance
Critical for safe consumption of taro, elephant ear, and other aroids containing needle-like raphides that cause oral irritation.
Science
Primary Reaction
CaC2O4 + 2H+ → H2C2O4 + Ca2+
Parameters
Temperature
30°C optimal
20°C to 40°C range
Temperature range for optimal oxalic acid leaching
Time
1 hour
30 minutes – 2 hours
Equipment
Large bowlStrainerMeasuring cups