Does wine really or fake drop white vinegar know This trick doesn’t work-liuxiaobo

Does wine really or fake drop white vinegar know? This trick is not good, Modern Express News (reporter Yu Yuehua trainee reporter Jetion photo) for people who like to drink wine, drink two glasses of wine every day is a kind of enjoyment of life. Not only can appetizer, but also to prevent cardiovascular and cerebrovascular diseases. But do you know if you’re drinking real wine? Some netizens can easily identify true and false wines with white vinegar and white toilet paper at home. Does it work? In November 7th, the modern express reporter walked into the Department of biological engineering of the College of food science and engineering of Nanjing University of Finances and Economics, followed by Professor Wu Ding to do three sets of true and false wine identification experiments. In the laboratory, Professor Wu blended the alcohol and anthocyanin and then shook it gently, and a cup of "wine" appeared. Reporter experiment anthocyanin with edible alcohol two minutes blending a cup of wine, Wu Ding is the southern Choi College of Food Engineering Department of biological brewing wine experts, from teaching has been 32 years. He teaches students to brew wine every year. Professor Wu Ding, wine industry is a mixed bag. In order to save costs, some unscrupulous traders did not use real grapes to brew wine. It is used to blend fake wines with anthocyanins, and even directly with chemical pigments and alcohol. And the adulterated wine, from the appearance, can not distinguish. In order to make the true and fake wine identification experiments, the modern express reporter bought anthocyanin from the Internet in advance, and the package says "grape seed extract"". Wu Ding said different weight of anthocyanins, pour into 10 wine tasting cup. Next, he poured a certain amount of edible alcohol into the tasting cup. Reporters noticed that, after mixing alcohol and anthocyanins, gently shaking, immediately appeared a cup of sedimentation and transparency are good wine, enough to do the real thing. And the whole blending process took only 2 minutes. In the experimental steps: 1. First, prepare 4 wine tasting cups, two of which pour into true wine, two cups pour into blended fake wine. 2. After dropping white vinegar into one of the real wines, the color of the wine is slightly shallower than the real wine without dropping white vinegar. 3. In a cup of blended fake white wine, the color of the white wine is slightly shallower than that of the fake wine without dripping white vinegar. Drop white vinegar in a cup of blended fake wine, and its color is slightly shallower than that of a fake wine without dropping white vinegar. – results: not a chemical reaction from the white vinegar and genuine Wine, to identify true and false. Wu Ding explained that this is because there is a lot of moisture in white vinegar, and white vinegar acidity is low, so the effect on the true and false wine is not obvious. So, why really wine and vinegar chemical reaction, blending of wine will also react with vinegar? Wu Ding said, because the blending of fake wine, the use of anthocyanins, and grapes brewed wine, which is also the content of anthocyanins, so the same reaction is not difficult to understand. "If the chemical synthesis of pigment blending wine, really will not change color.". But now, illegal businesses are also very"

葡萄酒是真是假滴点白醋就知道?此招也不灵 现代快报讯(记者 俞月花 文 见习记者 吉星 摄)对于喜欢喝葡萄酒的市民来说,每天喝上两杯葡萄酒是一种生活享受。不仅能开胃,还能预防心脑血管疾病。可你知道自己喝的是真的葡萄酒吗?有网友支招,可以在家中用白醋和白卫生纸轻松辨别出真假葡萄酒。这招有用吗?11月7日,现代快报记者走进南京财经大学食品科学与工程学院生物工程系实验室,跟随吴定教授一起做了三组真假葡萄酒鉴别实验。 在实验室,吴定教授将酒精和花青素混合后,轻轻一摇晃,一杯以假乱真的“葡萄酒” 就出现了 。 记者实验 花青素加食用酒精 两分钟勾兑出一杯“葡萄酒” 吴定是南财食品学院生物工程系酿制葡萄酒的专家,从教已经32年。他每年都会手把手教学生们酿制葡萄酒。 吴定教授介绍,葡萄酒行业鱼龙混杂。有些不法商贩为了节约成本,不用真正的葡萄经过发酵酿制葡萄酒。而是用花青素,甚至是直接用化工色素加食用酒精来勾兑假葡萄酒。而勾兑出来的假葡萄酒,从外观上,根本无法辨别。 为了做真假葡萄酒鉴别实验的需要,现代快报记者事先从网上购买了花青素,包装盒上写着“葡萄籽提取物”。吴定分别称取不同重量的花青素倒入10个葡萄酒品鉴杯中。紧接着,他分别往品鉴杯中倒入一定数量的食用酒精。记者注意到,酒精和花青素混合后,轻轻一摇晃,立马就出现了一杯沉淀度和透明度都很好的“葡萄酒”,足以做到以假乱真。而整个勾兑过程仅用了2分钟。 ■实验步骤: 1。首先准备4个葡萄酒品鉴杯,其中两杯倒入真葡萄酒,两杯倒入勾兑的假葡萄酒。 2。在其中一杯真葡萄酒中滴入白醋后,葡萄酒的颜色与没有滴入白醋的真葡萄酒相比,略微变浅。 3。在其中一杯勾兑的假葡萄酒中滴入白醋后,它的颜色与没有滴入白醋的假葡萄酒相比,也略微变浅。 在一杯勾兑的假葡萄酒中滴入白醋,它的颜色与没有滴入白醋的假葡萄酒相比,也略微变浅。 ■实验结果: 无法从白醋与真假葡萄酒的化学反应中,辨别出真假来。 吴定解释说,这是因为白醋中有不少水分,而白醋酸度较低,所以作用到真假葡萄酒上效果不明显。那么,为什么真的葡萄酒和醋发生化学反应,勾兑出来的葡萄酒也会和醋发生化学反应呢?吴定说,因为勾兑的假葡萄酒中,用的是花青素,而用葡萄酿制出来的葡萄酒,其中的含量也是花青素,因此出现同样的反应就不难理解了。“如果是用化工合成色素勾兑葡萄酒,的确是不会变色的。不过,现在不法商家也很聪明,勾兑的葡萄酒很多都是高仿,根本无法测出来。” 加碱可以辨别吗? 实验证实:还是不行 也有网友做实验说,碱放入真葡萄酒中,会让颜色变成蓝黑色。 放入碱后,真葡萄酒的颜色很快发生了变化,随着碱量增加,变成了咖啡色。 ■实验步骤: 1。准备两杯真葡萄酒和两杯勾兑的假葡萄酒;2。在一杯真葡萄酒和一杯假葡萄酒中加入碱。 ■实验结果: 真葡萄酒的颜色很快就发生了变化,不过,不是蓝黑色,而有些像墨绿色,接着随着碱量增加,又变成了咖啡色。而勾兑的假葡萄酒同样也发生了颜色变化。颜色更深了。因此,还是无法鉴别真假葡萄酒。 买葡萄酒请注意这些 葡萄酒酿制至少一年 不会太便宜   吴定说,消费者在购买葡萄酒时,从颜色上是很难区分出葡萄酒真假的。“唯一能看出来的是价格,几十块钱,甚至十几块钱的葡萄酒,你就要打个问号了。”他告诉现代快报记者,一瓶高品质的葡萄酒酿制周期至少是在一年以上,有些上好的葡萄酒甚至要酿制七八年。吴定教授给记者算了一笔账,从原料到出厂,品质好点的葡萄酒定价在150元左右才会有的赚。 吴定说,正宗葡萄酒酿制主要是三个元素:葡萄、酵母菌、二氧化硫,如果添加别的东西,就不正宗了。“所以物美价廉对于葡萄酒行业基本行不通。” 口感上能辨别真假? 一般消费者难做到 如果单从价位上看,遇到商家乘机抬价也不好判断。那是否可以从口感上辨别真假?吴定表示,真葡萄酒的口感很难描述。“只能说适合你的就是好的。”他表示,葡萄酒有上千甚至几千个品种。“它是一个集酸味、涩味、甜味、酒精味和果香味道在一起的复杂的感官刺激过程。一般品酒师会根据涩度、颜色、气味以及口腔感觉等品鉴得出来,但普通消费者很难做到。” 怎么选葡萄酒? 建议选大品牌,看标签 消费者怎么选购葡萄酒呢?吴定建议,最好选择大品牌。“大企业会讲究信誉,保护品牌,一般不会造假。” 江苏省营养协会公共营养师培训中心主任颜晓东则提醒,选葡萄酒,看价格是一方面,但如果明明是勾兑以次充好的,价格却要得高,也会迷惑消费者。所以还要看配料表。“如果上面写100%葡萄汁,还有微量二氧化硫,就是葡萄酒。但如果它写的是加了香精和甜蜜素,还有其他成分,比如注明葡萄露酒,葡萄汁酒,这种似是而非的,就不是正宗葡萄酒。”相关的主题文章: