The pH of soaking solution was measured by using a pH meter (Mettler Toledo, Seven Easy™, Switzerland). After soaking,the shrimps were frozen in the air-blast freezer (Thermoscience®)at 30 C until the core temperature reached 18 C and stored in the freezer before the analysis as described above. The freezethawed shrimps were cooked by boiling for 1 min. In order to compare with the treatment of commercial phosphate compound, sodium tri-polyphosphate (STPP) was also used at 4.0 g/100 ml. Soaking, thawing, cooking yield, texture and color of cooked and