The amount of salt dissolved out from raw noodle into water during boiling was assayed by photospectrometric determination of chlorine content.
The results can be summarized as follows :
1. When noodles containing 2, 4, 6 or 8% salt for the wheat flour by weight were boiled for 8 min in 15 times of water, about 90% of the added salt dissolved out into boiling water.
2. The amount of salt dissolved out indicated a tendency to increase as boiling time became longer. When noodles containing 4 or 6% salt were boiled for 6 min, the amount of salt dissolved out was around 85%, and for 8 min boiling it was around 90%. When noodle was boiled for 10 min, however, the amount of salt dissolved out did not increase any more.
3. The amount of salt dissolved out also indicated a tendency to increase as the volume of boiling water increased. When the noodle containing 4% salt was boiled in 5, 15 or 25 times of water, the amount of salt dissolved out showed 70, 90 or 95% respectively. In the case of the noodle containing 6% salt, however, the amount of salt dissolved out was 70, 90 and 90% in the same volume of water as the above mentioned.
4. In sensory test salty taste was detected only when salt more than 4% was added to a noodle. When raw noodle containing a defined amount of salt was boiled in different amount of water for different time, the sensory test could also detect the difference of amount of remaining saltin the noodle.
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