以烟熏腊肉为研究对象,经过条件优化,建立用气相色谱-质谱测定烟熏肉制品中甲醛含量的方法。结果表明,最优的衍生化处理与萃取的条件为:加入0.3 mL 2,4-二硝基苯肼,衍生化温度60℃,衍生化时间30 min,用二氯甲烷进行萃取,萃取2次;根据已建立的烟熏腊肉中的甲醛检测方法,低、中、高3个水平的平均回收率依次为79.8%、84.0%以及89.4%;重复性相对标准偏差为2.89%,检出限为0.50 mg/kg。该方法简便快速、结果准确、灵敏度高,可作为测定烟熏肉制品中甲醛的有效方法。
In the study of two similar literature masterpieces, A Dream in Red Mansions and The Story of Genji, garden planning, plant selection, aesthetic conception, descriptions about gardens, religious elements, architectural decorations and touring ways in both works were comparatively analyzed. Differences in geological conditions, social backgrounds, aesthetic traditions and religious beliefs led to different development trends of gardens in China and Japan. Chinese gardens were largely influenced by humanistic and cultural elements, famous for poetic and artistic conceptions, while Japanese gardens covered by religious colors, and most of its private gardens built with Buddhist preferences just like temple gardens. Chinese gardens valued the application of diversified plant species, while Japanese gardens favored evergreen plants, not flowers. Chinese preferred sightseeing in scenery, but Japanese preferred meditation, which means that, there were different touring ways in two countries. In conclusion, social and cultural differences contributed to the literati garden with profound humanity background in China and the Buddhist garden of religious colors in Japan.
