Chapter 1209 (1/2)

The two sides changed places, and boss Zhang also asked someone to bring two boxes.

Open the box and take out the tools inside.

Boss Zhang clamped the coins with tweezers and went out to burn the gold coins red with a flame gun.

People who have studied physics know that all kinds of metals have their own melting points, and the changes are different when they encounter the same high temperature.

If the material is the same, the color of the object at the same temperature is the same.

In the words of physics, temperature represents the severity of the molecules of an object.

Observe the process of high temperature, and observe the change of surface color after cooling.

The ancients also used this method to detect the purity of gold. Although the method is ancient, it is good to be practical!

Real gold is not afraid of fire. It does not change color at high temperature and does not change color after cooling.

From time to time, boss Zhang took out the tools in the toolbox and tested Li Lin's two gold coins.

Qiu Shaoze sat aside, sipping tea.

Just recently, their department wants to send some money to its members, but recently, the network virtual currency is facing a blow. Underground banks are monitored by the intelligence departments of various countries, and only the golden Dynasty is the best way.

So Qiu Shao found this man.

Secretly buying the gold in Li Lin's hands not only helped Li Lin, but also helped solve the problem of capital exchanges among members of his department.

Qiu glanced less at the gold in Li Lin's hand. It looked a little like northern European gold coins, but the northern European gold coins were not so large and had no such pattern.

Qiu Shao doesn't want to check the origin of this batch of gold! One is to trust Li Lin, and the other is to be too lazy to bother.

In short, after this batch of gold is melted, it can be made into gestures or decorations and sent to the intelligence agent through its peripheral members.

”Do you have any other gold coins?”

After checking the two gold coins in Li Lin's hand, boss Zhang opened his mouth again.

”Yes!” Li Lin took out several gold coins from different pockets and handed them over. Then he said curiously, ”boss Zhang, how pure are these gold coins?”

”Low purity!” Boss Zhang said truthfully, seeing that Li Lin's face changed, he said again: ”these gold coins contain many other elements, many of which I have never seen! Lead, iron and other common impurities can be eliminated! These impurities may be absolutely rare! ”

”Absolutely rare?” Li Lin shook his head. It seems that everything in Shenwu mainland is very backward. It is very civilized to mine common elements such as gold and silver and include them in the currency. They can't have industrial civilization. How can they find and extract rare elements? ”

Although Li Lin didn't go to school much, he also knew that some elements in nature were rare and that some elements were very easy to extract.

Boss Zhang took Li Lin's gold coins and observed them under a magnifying glass for a long time.

Then what seemed to come to mind? Take out a sharp knife, scrape a little powder from the gold coin, pour it into a bottle, and then use it to take some liquid from another toolbox and drop it into the bottle.

After a long time, boss Zhang's face gradually showed a smile.

”What's the matter?”

Seeing that boss Zhang seemed interested in gold coins, Li Lin and Qiu Shao wondered.

Just now you said that there are a lot of impurities in these gold coins. Why do you look happy now?

There are many impurities, which means you can't make much money this time!

”You gold coins contain a lot of metal palladium! Do you know what my solution is? ”Tribute!” Boss Zhang picked up the bottle of liquid, asked himself and replied, ”hydrogenated tribute does not contain hydrogen ions, but when encountering palladium ions, palladium hydride will be produced immediately and light yellow sediment will appear!”