银耳钉扎入苹果、鸡蛋乃至泡入硫酸铜溶液中，都没变色。 Tremella nail plunge into the apple/Eggs and bubble into cupric sulfate solution,Didn't change color. 银针插入我们常吃的苹果中。 Silver needle insertion we often eat the apple. 10分钟后，银针没有任何变化。 After 10 minutes,Silver needle without any change. 一会儿工夫，插入蛋黄中的银针明显变黑（下）。 In a few minutes,Insert the egg yolk silver needle obvious black(under).

　　银针试毒？

Silver needle to try poison?

　　银针泡硫酸铜溶液没变黑

Silver needle blister copper sulfate solution not black

　　鸡蛋黄倒是让它变黑了

The egg is let it get dark

　　用银针插入食物或酒中检验是否有毒，这一“银针验毒”的情节穿插在了无数的古装片中。宋代法医学家宋慈所著的《洗冤集录》中，就有用银针验尸的记载。而在现在，用银针、银筷验毒仍令很多人深信不疑。

With silver needle insertion food or wine inspection is poisonous or not,this"Silver needle test poison"The plot of the penetration in the numerous in costume film.The song dynasty SongCi forensic scientists with[Wash JiLu cause]in,The silver is useful autopsy records.now,With silver needle/Silver chopsticks test poison still make a lot of people believe in.

　　那么，银针真的能够验毒吗？日常生活中的物品也能让银针试出“毒”吗？扬子晚报记者在江苏某高校化学系学生小陆的帮助下对此进行了一番实验。在化学系实验室，小陆和扬子晚报记者戴上口罩、塑胶手套开始操作。实验有两个部分，记者先用女士们佩戴的银耳钉来实验这是一般家庭中常见的“银针”；随后，又选用真正的银针再次进行实验。

so,Silver needle really can test poison?Items in daily life also can let try out the silver"poison"??Yangzi evening news reporter in jiangsu a university department of chemistry students under the help of lu's that some kind of experiment.In the department of chemistry laboratory,Xiao lu and yangzi evening news reporters wear the mask/Plastic gloves and began to operation.The experiment has two parts,Reporter use first ladies wear white fungus nail to experiment it is in average household is common"Silver needle";then,And choose the real silver needle experiment again.

　　实验

The experiment

　　实验目的：将银耳钉、银针等插入苹果、鸡蛋、硫粉、硫酸铜溶液中，肉眼观察银耳钉、银针表面变化。

The experiment purpose:Will tremella nail/Silver needle, etc into the apple/eggs/Sulfur powder/Copper sulfate solution,Macroscopic observation tremella nail/Silver needle surface change.

　　实验器材：925银耳钉一枚、定制银针两根、苹果两个、鸡蛋两只、硫粉、硫酸铜溶液。

The experiment equipment:925 tremella nail a gold/Custom silver needle two root/Apple two/Eggs two/Sulfur powder/Copper sulfate solution.

　　什么样的耳钉是真正的银耳钉呢？告诉你：仔细观察耳钉，你会发现有个标记“925”（即纯度92.5%），这就是基本的判断了。

What kind of earring is the real white fungus nail?Tell you:Observe carefully stud earrings,You will find that there is a mark"925"(Namely purity 92.5%),This is the basic judgment.

　　

实验1 Experiment 1

　　

银耳钉扎苹果鸡蛋没变色 Tremella pinning apple eggs didn't change color

　　实验开始了，扬子晚报记者用一根标有“925”纯度的银耳钉插入苹果中这不是童话中王后的“毒苹果”，意料之中，银耳钉没有任何反应；接着插入鸡蛋，仍然没反应，“很正常，鸡蛋黄没有毒。”小陆说。

Experiment began,Yangzi evening news reporter with a piece of marked"925"The purity of tremella nail insertion of the apples in this is not a fairy tale of the queen"Poison apples",expected,Tremella nail no reaction;Then insert the eggs,Still didn't respond,"Very normal,The egg is no poison."Xiao lu said.

　　

实验2 Experiment 2

　　

银耳钉试硫粉硫酸铜没变色 Tremella nail doctor powder copper sulfate didn't change color

　　为了让银耳钉有点“反应”，小陆找来了硫粉、硫酸铜溶液。通常来说，银耳钉接触这两种物质后铁定会变黑。但意外发生了，耳钉不但没变黑，反而十分光亮！记者干脆把银耳钉丢进硫酸铜溶液浸泡半个小时，依然没反应。“如果银真的能验出毒来，肯定不会需要这么长时间。”小陆认为。

In order to make white fungus nail a bit"reaction",Xiao lu found the sulfur powder/Copper sulfate solution.Generally speaking,Tremella nail contact with the two kind of material and they're going to black.But the accident happened,Ear nail not only not black,But very light!Reporter simply put white fungus nail into the copper sulfate solution soak half an hour,Still didn't respond."If silver can really check out poison to,Won't need such a long time."Xiao lu think.

　　

用纯度为99.9%的银针试毒 With the purity of 99.9% silver needle to try poison

　　会不会是因为925银的耳钉含有其他杂质导致不能与这些东西反应呢？为此，记者在淘宝网上找到一家专门定做银针的店铺，花40多元定做了两根两寸长、纯度为99.9%的银针。

Will not because 925 silver earring contain other impurities which could and these things? Reaction?therefore,Reporter in taobao find a special customized silver needle shop,Spend 40 multiple to have something made to order two root two inches long/The purity was 99.9% of the silver needle.

　　

银针扎苹果没变色 Silver needle pierced apple didn't change color

　　小陆用小刀将苹果切下一块放在白色试纸上。扬子晚报记者将银针插入苹果中，静置10分钟后拔出，银针表面依然非常光亮，充满金属光泽。看来，无毒的苹果的确不会令银针变黑。

Lu's use a knife to cut the apple the next block on the white on the test paper.Yangzi evening news reporter will silver needle insertion in the apple,Standing out after 10 minutes,Silver needle surface is still very bright,Filled with metallic luster.It seems,Non-toxic apple does not make silver needle black.

　　

银针扎鸡蛋针头立即变黑！ Silver needle pierced eggs needle immediately black!

　　那么，银针插入其他无毒的食物中也没有变化吧？

so,Silver needle insertion other non-toxic food also did not change it?

　　扬子晚报记者又敲开煮熟的鸡蛋，将银针插入鸡蛋蛋黄中，一会后拔出来查看，令人惊奇的现象发生了：银针的针头部分几乎一插入就变黑了，表面蒙上了一层淡淡的黑色物质；而外面未接触鸡蛋的针体依然光亮。

Yangzi evening news reporters and open the boiled eggs,The silver needle insertion eggs in the egg yolk,After a while pulling out,Amazing happened:The silver needles part almost a insert will be darkened,Surface covered with a layer of light black substance;And it did not contact egg needle body still bright.

　　“没想到这么快就有反应了。”看到针头这么快就变黑，小陆也觉得很有意思。

"Didn't expect so quick responding."See the needles so fast is black,Xiao lu also feel very interesting.

　　

实验3 Experiment 3

　　

银针试硫粉三分钟变黑！ Silver needle doctor powder three minutes black!

　　在用砂纸将银针表面的黑色打磨掉以后，小陆从实验药剂中取出三药匙淡黄色的硫粉放在试纸上，将银针放入其中包裹起来。

In the sand the silver needle surface black burnish off later,Xiao lu from the experiment agent in the take out three spatulas flaxen sulfur powder on the test paper,The silver needle into which wrap up.

　　银针一开始并没有明显的变化。在等待了3分钟后，扬子晚报记者注意到，银针表面开始出现了一点点淡淡的黑色。小陆将针取出后，记者观察到，银针表面很明显地变黑了。

Silver needle a start and no obvious change.Waiting for three minutes,Yangzi evening news reporter noticed,Silver needle surface began to appear a little light black.Xiao lu will remove the needle,Reporter observed,Silver needle surface obviously darkened.

　　看来，与硫粉接触会令银针变黑，不过变黑的速度没有鸡蛋那么快。“硫跟银反应是会生成硫化银的，鸡蛋的蛋黄里面应该有硫，不过能让银这么快变色还是挺奇怪的。”小陆认为，也许是鸡蛋中某些有机物促进了反应的发生。

It seems,And sulfur powder contact will make silver needle black,But black speed no eggs so fast."Sulfur with silver reaction is generates the silver sulfide,Egg yolk inside there should be a sulfur,But can let silver so fast color or pretty strange."Xiao lu think,May be some organic eggs to promote the occurrence of the reaction.

　　

实验4 The experiment and

　　

试硫酸铜溶液没变色 Try copper sulfate solution not change color

　　硫酸铜水溶液呈酸性，属于保护性无机杀菌剂。和石灰乳混合可得波尔多溶液，用作杀虫剂。“硫酸根离子是比较稳定的，银也是稳定的金属，两者应该不能发生反应。”实验前，小陆推测银针不会变黑。

Copper sulfate solution is acidic,Belong to the protective inorganic bactericide.And lime milk mixed available bordeaux solution,Used as pesticide."Sulfuric acid root ion is relatively stable,Silver is also stable metal,They should not happen reaction."Before the experiment,Xiao lu speculate silver needle not become black.

　　再次将变黑的银针打磨后，小陆从药剂瓶中取出三药匙蓝色的硫酸铜固体放入试管中，加入10毫升蒸馏水，配成了天蓝色的硫酸铜溶液，并用镊子夹住银针放入。静置10分钟后，小陆将针取出，扬子晚报记者仔细观察后发现，银针表面并没有任何变化。

Again blackened silver needle after grinding,Xiao lu from agent bottle out of the three spatulas blue copper sulphate solid in the test tube,Add 10 ml of distilled water,With a sky-blue copper sulfate solution,Using tweezers clamping silver needle into.Let stand at least ten minutes,Xiao lu withdraw the needles,Yangzi evening news reporters after careful observation found,Silver needle surface and don't have any change.

　　

专家解析 Expert analysis

　　南航附中化学老师宋凡凡介绍，古人用银针试的“毒”基本上是砒霜，即三氧化二砷。古代提炼技术落后，砒霜中含有少量硫杂质。正是这些硫杂质与银发生了氧化还原反应，生成了硫化银，使得银表面变黑，就验出了毒。而现代技术水平下，砒霜中不再含有硫杂质，用银针想要验出“毒”并不现实。

China southern airlines attached middle school chemistry teacher SongFanFan is introduced,The ancients with silver needle try"poison"Arsenic is basically,Namely arsenic trioxide.Ancient refining technology lag behind,Arsenic containing a small amount of sulfur impurity.It is these sulfur impurity and silver happened REDOX reaction,Made silver sulfide,Make silver surface black,Just check out the poison.Modern technology level,Arsenic is no longer contains sulfur impurity,With silver needle want to check out"poison"Is not reality.

　　在扬子晚报记者所做的实验中，苹果所含的物质基本为碳、氢、氧，不能和银发生化学反应。而鸡蛋能够如此快速地令银针变黑，宋老师认为是鸡蛋的蛋黄中含有的硫化氢起了作用。“硫化氢中有负二价的硫离子，遇到银很快就能反应生成硫化银。硫粉中的硫是硫单质，跟银发生反应就需要长一点的时间，甚至要加热一下才能看到现象。”

In the Yangtze evening news reporter to make the experiment of,Apple contains material basic for carbon/hydrogen/oxygen,Can't and silver biochemistry reaction.And eggs can rapidly make silver needle black,Song the teacher considered egg yolk contains of hydrogen sulphide played a role."Hydrogen sulfide in negative bivalent sulfur ion,Meet silver will soon reaction generating silver sulfide.Sulfur powder sulfur is the simple substance sulfur,With silver reaction will take a little longer,Even heating it to see phenomenon."

　　

为什么 why

　　

银耳钉验毒总不变黑？ Tremella nail test poison always the same black?

　　至于925银耳钉为何不能发生反应，宋老师认为这可能与纯度及925银的制作工艺有关。“可能在制作过程中有其他杂质包裹在外面，里面的银就不能发生反应了。”

As for 925 tremella nail why not react,Song the teacher say it may and purity and 925 silver the making craft of relevant."May be in production process there are other impurity wrapped in outside,The inside of the silver cannot occur the reaction."

　　

用银餐具有益健康 Silver tableware are beneficial to health

　　

倒是真的 's true

　　“现代人用银针验毒没有科学依据。”南京师范大学化科院从事金属研究的韩敏副教授介绍，一般情况下，硫、硒等物质都能跟银发生氧化还原反应，从而使银变黑。含硫的物质中，有一部分是有毒的，如亚硫酸钠，但有毒的老鼠药、氰化物等就不能被银针检出。“人体的氨基酸中就含有硫，不能说能让银变黑的就是有毒的。”不过，韩敏告诉扬子晚报记者，虽然“银针验毒”不可信，不过由于银离子已经被证明具有一定的杀菌功效，日常生活中使用银餐具、银首饰可能会在一定程度上有益人体健康。（大学生记者 宋璟 扬子晚报记者 蔡蕴琦 文/摄）（扬子晚报）

"Modern people with silver needle test poison no scientific basis."Nanjing normal university chemical science institute is engaged in metal research HanMin associate professor is introduced,generally,sulfur/Selenium and other material can occur with silver REDOX reaction,So that silver black.Sulfur in the material,Some are poisonous,Such as sodium sulfite,But poisonous rat poison/Cyanide and cannot be silver needle detection."The human body contains sulfur amino acid,Can't say can let silver black is poisonous."but,HanMin tell yangzi evening news reporter,although"Silver needle test poison"Not believable,But because of silver ion has been proved to have certain sterilization effect,Silver tableware used in everyday life/Silver jewelry may be in a certain extent beneficial to human health.(College students' reporter song Jing yangzi evening news reporter CaiYunQi text/taken)(Yangzi evening news)