DietaryLife. 12(2): 107-122 (2002)11. Choi MJ. ... Journal of Korean Home Economic Education. 24(2): 51-62 (2012)3. Kim IS. Food and Health. ... PRO-NITRO, JP SELECTA, Barcelona, Spain)를 이용하여 40% NaOH와 반응시키고 혼합지시약(0.1% Methyl red : 0.2 Bromocresol green