But how do you get started with this analysis?

Lin Mo once said that the reason why everyone can't refine this elixir may be a fake pill. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

Whether Dan Fang is true or false, Li Feng can't judge. If it is fake, Li Feng really has no way at all, let's assume that this Dan Fang is real.

Based on this assumption, if the Dan Fang is true, then why has no one ever succeeded in refining it?

Li Feng had learned a lot of chemistry, and he clearly remembered that he wrote in a chemistry book: If the same experiment results in different products, then it is necessary to analyze what has changed in the process.

The ancients were able to refine the elixir, but today people are not successful in refining it, and it can be said that the products obtained are different. So, what has changed in the process?

"Time ......," Li Feng muttered to himself.

The reason why Gu Dan is called Gu Dan must have gone through endless years. These infinite years are time. Gu Dan has survived until now, and it has gone through a long time, although everything on the Dan Fang has not changed, but the time, the two have been completely different.

However, what has time changed so that people today can no longer refine the elixir?

Li Feng pondered carefully, and it was obvious that there was only one thing that time had changed, and that was the dispensing of this elixir.

Whether it is in ancient times or now, the dispensing of medicine is written on the Dan Fang. However, after a long period of time, it is difficult to guarantee that the medicinal properties of these dispensing drugs in ancient times are the same as those of these dispensing drugs now.

The problem, most likely, lies in these dispensing.

However, how could Li Feng know which of the dispensing drugs had changed? Not to mention the medicinal properties of those dispensing medicines in ancient times, Li Feng didn't know much about the medicinal properties of these dispensing drugs now.

In this way, how can we distinguish the medicinal properties of various drugs?

Li Feng sighed slightly, "This is really a problem that is many times more difficult than any chemical problem. ”

Li Feng had a feeling that he didn't know where to start, he turned his gaze to those dispensing medicines again, and gently counted them one by one: "Qingfeng grass...... Complex flower ...... White Feather Stone ...... Kasumi Copper Grass ......"

"Xia Copper Grass ......" Suddenly, Li Feng's eyes lit up, and he seemed to realize something.

"Kasumi Copper Grass...... As far as I know, it grows only in places where iron ore is abundant. It stands to reason that it should be called Xia Iron Grass, but why should it be called Xia Copper Grass?"

"The name of a spirit grass has been handed down from ancient times. It is conceivable that in ancient times, this kind of spiritual grass was called Xia Copper Grass. However, why did the ancients give this spiritual grass such a strange name? It is obviously a spiritual grass that grows on the iron mine, but it just takes the name of Xia Copper Grass, which is really strange. ”

Thinking of this, Li Feng's heart was shocked, "Could it be ...... Later, perhaps it was a change in the environment, or a mutation of the spiritual grass, this kind of spiritual grass could only grow in iron mines. ”

"Spirit grass grows in places where copper ore is enriched, and copper must be enriched in the grass body. And now all the Xia copper grass grows on the iron mine, and only the iron element is enriched in the grass body, where is there still a trace of copper element. ”

"Do you mean...... The difference between copper and iron is what time has changed?"

Li Feng seemed to have discovered a new continent, and his eyes flashed with excitement.

"According to this reasoning, is it possible that the difference between copper and iron will affect the success or failure of refining the elixir?" Li Feng thought carefully for a moment and nodded, "There is such a possibility. Refining elixir is, to put it bluntly, a chemical reaction, and most of them are organic reactions. In many organic reactions, in order to make the reaction more thorough and faster, it is necessary to add a catalyst. Moreover, the role of catalysts, not only that, there are many reactions, without the participation of catalysts, it is impossible to carry out at all. ”

"If my inference is true, then it is safe to say that this spirit grass called Xia Tong Grass is a spirit grass that plays a catalytic role. To be precise, the copper in this spirit grass is the core of catalysis. Today's spirit grass, there is no copper in the grass, only iron, of course, it does not play a catalytic role, so the reaction cannot be carried out. ”

In this way, it perfectly explains why the ancients were able to refine the Qi and Luo Fei Pill, but today's people can't refine this pill. ”

"That's what happened...... Ha ha...... It's just the difference between copper and iron......" Li Feng laughed loudly, very happy in his heart. This kind of joy is not only that he knows how to refine Qi and Luo Fei Dan, but also that it brings joy to solving a difficult problem.

......

If you want to talk about ordinary copper, Li Feng can find a lot of it in a moment.

He wandered around the room for a moment, and there was already a small piece of copper in his hand.

Subsequently, Li Feng found a few more jade bottles, and added some qi and Luo Fei Dan to each jade bottle. Unlike the previous refining, Li Feng did not add the elixir called Xia Copper Grass this time, but threw the small copper piece into the jade bottle to replace the Xia Copper Grass that had no trace of copper and was all iron.

After that, Li Feng used the method of controlling the temperature to refine Qi and Luofei Dan.

This time to re-refine Qi and Luo Fei Dan, Li Feng felt very much during the refining process, and felt that he would definitely be able to succeed.

Soon, by adjusting different temperatures, Li Feng obtained three more reaction products. When Li Feng injected the aura into the three jade bottles one by one, there was a bottle of medicinal liquid, frantically absorbing Li Feng's aura.

"It's done?" Li Feng took the bottle of liquid that absorbed the aura and held it up in front of him, sincerely happy in his heart.

Everything that has been achieved through hard work and suffering will make people especially happy.

Li Feng stood still for a while, letting the liquid naturally stratify, and then separating the useless part of the liquid medicine, and what remained was the essence of the liquid medicine.

Li Feng held the jade bottle in front of his eyes and looked at it carefully for a moment. In the golden liquid, there is a faint brilliance swirling in it.

The mouth of the jade bottle was close to Li Feng's lips, Li Feng did not hesitate, with a movement of his wrist, the jade bottle tilted violently, and the small half of the medicinal liquid was poured into Li Feng's mouth. After making so much effort to refine the medicinal liquid, if you want to know if it is the active ingredient of Qi and Luofei Dan, there is no other way but to rely on Li Feng to experience it personally.

The fact that he drank the potion so without hesitation was also a manifestation of his confidence in himself.

......

The small half of the liquid medicine slid down the throat and into the abdomen like a fire. Where the liquid medicine passed, it was like a line of fire passing by, leaving a burst of burning pain.