OCCURRENCE OF BOUND SALT IN FREEZE-CONCENTRATED SOY-SAUCE

Part of the salt in soy sauce formed no eutectic H2O . 2NaCl crystals at sub-zero temperatures and remained in a freeze-concentrated product . NMR line width of Na-23 was broader in the concentrated soy sauce th an in the material. A broad line width of Na-23 was also observed in a n aqueous solution of NaCl and a non-diffusible soy sauce fraction. Th e data indicate that part of the salt in soy sauce interacted with its non-diffusible fraction and that such bound salt formed no eutectic c rystals.