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根据GB5539-85“植物油中猪脂的检出”方法鉴别猪油,只是提出在冰箱或冰水中进行试验,没有明确试验温度,有时会得出错误判断.我们探索其原因,发现关键是必须选定一个合适的温度范围,即2-6℃作为试验温度,使猪油析出猪脂结晶,而棕榈油和其他食用植物油均无此反应.(一)原理:利用猪脂在乙醚中溶解度小
According to GB5539-85 “detection of lard in vegetable oils” method to identify lard, but proposed in the refrigerator or ice water test, there is no clear test temperature, and sometimes will give wrong judgments. We explore the reasons and found that the key is to be selected Set a suitable temperature range, that is, 2-6 ℃ as the test temperature, so lard lard crystallization, and palm oil and other edible vegetable oil are not the reaction. (A) Principle: The use of lard in the ether solubility of small