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  • 如何鉴别香油
  • 本站编辑:杭州思里圣同节能科技有限公司发布日期:2019-08-01 13:09 浏览次数:

香油如何才能快速鉴别其真假呢?

1、辨色法:纯香油呈红色或橙红色,机榨香油比小磨香油颜色淡,香油中掺入菜籽油则颜色深黄,掺入棉籽油则颜色深红。

2、水试法:用筷子蘸一滴香油滴到平静的凉水面上,纯香油会呈现出无色透明的薄薄的大油花。掺假香油的油花小而厚,且不易扩散。经验证此法在区分纯香油与调和香油时,水温有决定性作用,凉水两者都不散,无法区分;温水两者都散开,但油花形状与大小不一致。

3、嗅闻法:小磨香油香味醇厚、浓郁、独特,如掺进了花生油、豆油、精炼油、菜籽油等则不但香味差,而且会有花生、豆腥等其它气味。部分香油是由食用香精勾兑而成,嗅感比较差。

消费者在购买芝麻油时也可从以下几个方面进行鉴别:

一看色泽:纯香油呈淡红色或红中带黄,如掺入其他油,色就不同。掺菜籽油呈深黄色,掺棉籽油呈黑红色。对于掺有其他植物油的产品,也可采用水试法:用筷子醮一滴香油滴到平静的水面上,纯香油会呈现出无色透明的薄薄的大油花,掺假的则会出现较厚较小的油花。

二看透明度:一般质量好的香油透明度好,无浑浊。

三看有无沉淀物:质量好的无沉淀和悬浮物,粘度小。

四看有无分层现象:香油对温度相当敏感,所以在温度较低时有可能分层。若在常温下有分层、0℃下粘度无明显增加,(国家标准在做冷冻试验时在摄氏零度存放5.5时,不结冻为合格)不凝则很可能是掺假的混杂油。若在什么温度下都无分层,说明香油中加入了防冻添加剂。

How can balm oil quickly identify its true and false?

1, color discrimination method: pure sesame oil is red or orange red, press sesame oil than small ground sesame oil color light, sesame oil mixed with rapeseed oil color deep yellow, mixed with cottonseed oil color deep red.

2, water test method: use chopsticks dipped in a drop of sesame oil drops to calm cool water surface, pure sesame oil will appear colorless transparent thin oil. Adulterated sesame oil is small and thick, and not easy to spread. It is proved that the water temperature plays a decisive role in distinguishing pure sesame oil from mixed sesame oil. The warm water spreads out, but the shapes and sizes differ.

3, smell method: small ground sesame oil fragrance mellow, rich, unique, such as mixed with peanut oil, soybean oil, refined oil, rapeseed oil and so on is not only bad flavor, but also have peanut, bean smell and other odors. Part of sesame oil is mixed by edible essence, the smell is poor.

Consumers in the purchase of sesame oil can also be identified from the following aspects:

A look at color: pure sesame oil is light red or red with yellow, if mixed with other oil, color is different. Rapeseed oil is dark yellow, mixed with cottonseed oil is black red. To mix the product that has other vegetable oil, also can use water to try a method: dip a drop of sesame oil with chopsticks to drop to calm water surface, pure sesame oil will appear colorless and transparent thin film big oilflower, adulterated will appear thicker and smaller oilflower.

2 see transparency: general quality of sesame oil transparency is good, no turbidity.

Three to see whether there is no precipitation: good quality without precipitation and suspension, viscosity.

Four see whether there is stratification phenomenon: sesame oil is quite sensitive to temperature, so at a lower temperature may be stratified. If there is stratification at room temperature and viscosity does not increase significantly at 0℃, (national standard in freezing test at 5.5 ℃ storage temperature, non-freezing is qualified) non-coagulation is likely to be adulterated mixed oil. If there is no stratification at any temperature, the sesame oil added anti-freeze additives.