推荐回答(4个)
1. 看色:小磨香油红中带黄,机榨香油俗称大槽油,比小磨香油色浅淡,熟菜籽油色泽深黄。 2. 闻味:小磨香油,因芝麻经过适当火候炒后;芝麻醚变为具有香味的芝麻酚,香味格外醇厚浓郁。如掺假夹杂,兑入花生油或豆油等,醇香味差,而且带有花生或豆腥气味。 3. 观形:香油在日光下透明,如掺入1.5%的水,便呈不透明的液体,甚至易沉淀变质。 掺假香油主要是掺水、冬瓜汤、米汤等。选购时只要看外形就能识别。将香油在阳光下观看,好的香油就透明清澈,如油中掺入0.15%的水或冬瓜汤、米汤等,在阳光下则呈不透明液体;如掺入0.35%的水、冬瓜汤或米汤时,油层就会分离混浊,并容易沉淀变质。此时只要闻一闻即知,质量好的香油,香味浓郁,如味淡甚至有异味则证明掺了假。 此外,还从看油花辨别,在一碗清水中,放油一滴,如是纯香油,起初是薄薄油花,很快扩散,凝成若干个小油珠;如掺假时则油花小,且不易扩散。质量好的香油呈黄红色,小磨香油色较重,机制香油色较淡;如颜色深黄则就考虑掺了熟菜籽油;如能加热,则可进一步鉴别。香油兑有猪油加热后发白;竞有棉籽油则淤锅。如是瓶装油,应注意看上下区别,防止上装香油下装杂油。此外,将油放放冰箱冷冻室后取出观察,纯正香油应为液态,如假香油则凝结。假油能引起人体中毒 就假香油对人体的危害,记者采访了郑州工程学院的陈副教授。她告诉记者□商贩们用于香油作假用的黑油就是粗制棉籽油。食用粗制棉籽油可引起急性或慢性中毒。这是因为在棉籽中含有大量棉酚、棉绿素等有毒物质,未经精炼的粗制棉籽油中棉酚类物质清除不彻底,而游离棉酚是一种细胞毒素和血管神经毒素,可以造成人体的胃和肾脏损害。因此,粗制棉籽油不能吃。用香油精制作的香油则属于假冒伪劣产品,国家是绝对不允许的。消费者如何分辨香油的真假呢?常年经营小磨香油的商户张女士介绍,真正芝麻磨出来的香油,颜色浓重,比较黏稠,用玻璃瓶盛装后,轻轻晃瓶,可以看出黏稠度,同时油会略微挂瓶,而对制出来的比较稀,几乎没有挂瓶现象。同时通过闻味道识别,真正的香油味道醇厚,而对制的闻久了会感觉不舒服。最后还可以看油本身,芝麻磨制的香油有时会有悬浮物,也就是碎芝麻,而对制的比较清澈,没有任何悬浮物。
找来的答案
识别芝麻油真假的方法
1.水鉴别:滴一滴麻油滴在清水里,纯麻油会呈现出无色透明的大型油花,然后会凝聚成一些小油珠,而掺假的麻油则油花会很小,且不会扩散
2. 颜色识别:将盛满麻油的器皿向另一透明器皿中倾倒,若溅起的油花是淡黄色的,则说明麻油中掺有其他油
3. 加热法:将麻油放入锅内加热,若加热后发白,说明掺有猪油;若加热后变得很清,则兑了菜籽油;若加热后发浑,则兑入了米汤,不多久就会有沉淀产生,若没有变化则为真正的麻油
4. 气味鉴别法:取一点于手心摩擦发热,香味纯正的是麻油,有豆腥气的是掺有豆油的,有辛辣味的是掺有菜籽油的。
5. 震荡法:取一瓶麻油轻轻震荡,若气泡透明,且很快消失,一般是纯正麻油。若气泡呈现黄色,且消失较慢,则为假冒麻油
1、看色
纯正芝麻油呈淡红色或红中带黄,若掺入了熟菜籽油,则色泽深黄或发青,掺入棉籽油会呈黑红色。
2、闻味
纯正芝麻油的香味醇厚浓郁,如掺假,兑入花生油或豆油等,香味刺鼻,带有花生或豆腥味或有焦糊味。
3、摇晃
将瓶装油轻轻摇晃,如产生的气泡透明,且很快消失,则纯正;如这种油气泡不透明且为黄色,消失得较慢,则为劣质。
4、水试
将一滴芝麻油滴入一碗清水中,纯芝麻油会呈现出薄而透明的大油花,迅速扩散后凝结成若干细小的油珠。掺假油花则小而厚,不易扩散。
5.冷冻法。
把芝麻油放在零下10度的环境中,冷冻10分钟后取出。如果是纯芝麻油的话,取出后不会完全凝固,应该有流动性,颜色的变化也不大,相反,假芝麻油取出后,几乎完全凝固,流动性也不能说了。
在家快速识别真假芝麻油的方法就是一看、二闻、三比较。首先是“看”,其实就是观察,观察芝麻油的颜色。上面说到长康芝麻油呈红色或橙红色,而掺杂了棉籽的芝麻油颜色深红,而且会有浑浊物质。
其次是“闻”,闻味道,芝麻油并不是越香越好,而应该侧重香味的舒适感和绵密程度。
最后,也是最重要的一点,就是“比较”。这里的比较,不是比较说明书上的功效、不是比较产品价格,而是比较品牌知名度。认准大品牌,选择市场知名度高的产品,这样自己的权益才更有保障。
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