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油买大桶的还是小瓶的现在的消费者购买食用油一般都到超市大卖场。由于大桶包装的油价格便宜,有的三口之家一下子买5升,吃上几个月,因为保质期长达1年,所以觉得这样没问题。其实,许多人对保质期都有误解:保质期1年指的是密封条件下可保存1年,一旦打开油桶盖,油与空气接触,在夏天,只需1个月油就开始氧化变质;就算不打开盖,由于塑料油桶的阻隔性较差,阳光和氧气易透入,时间一长,油的质量也会渐
Oil buy vats or vials of consumers now buy cooking oil are generally supermarkets. Due to the low price of vats packed in oil, some three-family houses bought 5 liters at a stretch for a few months because the shelf life of up to one year, so I think this is no problem. In fact, many people have misunderstood the shelf life: shelf life of 1 year refers to the seal can be stored for 1 year, once opened the lid, oil and air contact, in the summer, just 1 month began to oxidize the oil deterioration; even if Do not open the lid, due to poor barrier properties of plastic drums, sunlight and oxygen easy to penetrate, over time, the quality of oil will gradually