表2-1常见食品中水分含量与水分活度的关系 Food Moisture content(%) Water activity Ice(0C) 100 1.00 Ice(-10C) 100 0.91 Ice(-20C) 100 0.82 Ice (-30C) 00 0.62 Fresh meat鲜肉 70 0.985 Bread面包 0 0.96 Marmalade橘子果酱 35 0.86 Wheat flour面粉 14.5 0.72 Raisin葡萄干 27 0.60 Macaroni通心粉 10 0.45 Boiled sweets硬糖 3.0 0.30 Biscuits饼干 5.0 0.20 Dried milk奶粉 3.5 0.11 Potato crisps炸薯条 1.5 0.08