Chapter 76 Principles of Atomic Absorption

Li Peicheng was just about to ask Liu Zhiyun what had happened when Liu Zhiyun turned back to the office sadly.

Seeing this, Li Peicheng had to put down his work and follow him into the office.

"Who messed with you, Zhiyun?" Li Peicheng asked.

"It's you, you annoying guy!" Liu Zhiyun raised her mouth in anger.

"I, what's wrong with me?" Li Peicheng asked innocently.

"I ask you, where did you go last night? Why don't you eat with me? Why don't you study by yourself at night? Why didn't you call me?" Liu Zhiyun stared at Li Peicheng and asked repeatedly.

Li Peicheng couldn't laugh or cry when he heard the words. When did he even need to report these things to Liu Zhiyun?

However, Li Peicheng can see that Liu Zhiyun's attitude is very serious, which does not seem to be unreasonable or joking.

"I had something urgent last night, so I didn't care about you!" Li Peicheng replied.

He doesn't want to tell Liu Zhiyun about Lan Xiaoxue and others. He has an intuition. It's better not to tell her about it.

"In the evening, let's have dinner together. How about self-study in the evening?" Li Peicheng continued.

"Who cares!" Liu Zhiyun's anger had calmed down a little. Finally, she realized that she seemed to be a little unreasonable, and she blushed back.

When Li Peicheng saw that Liu Zhiyun's cheeks were slightly flushed, he felt very beautiful and couldn't help but be stunned.

"Why don't you do the experiment? What are you standing here watching?" Liu Zhiyun was very happy to see that Li Peicheng had been staring at her. Her lost mood had long disappeared. She gave Li Peicheng a white look and said in a feminine voice.

"So you're not angry?" Li Peicheng asked.

"Who is so bored and angry with you?" When Liu Zhiyun saw that Li Peicheng mentioned what had just happened, she couldn't help but be angry and shy.

Seeing this, Li Peicheng smiled and turned around and out of the office.

After Li Peicheng walked out of the office, Liu Zhiyun held her chin in her hands and looked out of the window in a daze, feeling that her heart was beating fast.

Did I fall in love with him? Is this love? Liu Zhiyun asked herself.

But the shadow of the family is like a nightmare that can't be wavered in her mind.

Soon Liu Zhiyun's eyes showed sad and melancholy eyes, because she thought that even if Li Peicheng fell in love with her, she would not gain anything from this love.

"Since you have thought about resisting to the end, what are you afraid of? Even if you can't resist in the end, you should be happy during this period.

Li Peicheng's words flashed in Liu Zhiyun's mind.

Liu Zhiyun quickly put away the sadness in her heart. She wanted to live happily with Li Peicheng for a period of time.

Liu Zhiyun left the office and returned to the laboratory. Seeing Li Peicheng's busy back in the laboratory, she couldn't help smiling.

Many people in the laboratory saw the smile on Liu Zhiyun's face, which may be the first time they saw Liu Zhiyun's smile.

The boys were stunned, and their eyes were so hooked that they couldn't turn at all. When the girls looked at them, they were so envious and jealous. Why didn't they have such a touching smile? Peicheng, let's stop the experiment here in the afternoon!" Liu Zhiyun walked to Li Peicheng and said.

"Why?" Li Peicheng asked.

"I want to test the heavy metal content of a batch of samples dissipated yesterday. Don't you want to learn the operation of the instrument?" Liu Zhiyun said in a delicate voice.

"Oh, you're going to get on the instrument today!" Li Peicheng was a little surprised.

"Hmm!" Liu Zhiyun nodded. He nodded.

Instrument analysis courses are available in university courses. Li Peicheng has also worked hard and has studied the principles of it.

But there is basically no actual operation. The teacher took them to visit the instrument and introduced the structure of the instrument.

The Department of Resource Science originally also had Taiwan Nissan Shimadzu atomic absorption, but due to poor management at the beginning, the users were relatively miscellaneous, and the instrument failure rate was relatively high.

Later, it was changed to a special management, and it was rare for scientific research assistants like Li Peicheng to have the opportunity to operate in person.

"First put the lead hollow cathode lamp on it, warm it up and stabilize it for a period of time."

Liu Zhiyun directed Li Peicheng to operate step by step.

"The lead hollow cathode lamp is used to emit characteristic spectral lines. The characteristic spectral line emitted by it excites the ground state lead atom in the ignited gaseous solution. The lead atom absorbs the characteristic spectral line and jumps to a higher energy level. We call it an excited state.

The more absorption of hollow cathode light means that the higher the lead content in the solution, the higher the lead content in the solution can be calculated according to Lamberbil's law..." Liu Zhiyun introduced the principle of atomic absorption in detail.

The understanding of the principle in practice is very intuitive, which will give people a feeling of seeing the whole development. Now Li Peicheng has this feeling.

The principles learned before can be immediately integrated, and even the interference of spectral lines can be recalled.

After the analysis, it's time to eat.

Li Peicheng accompanied Liu Zhiyun on the way to campus slowly, ready to go to the canteen for dinner.

Suddenly, the mobile phone rang, and Li Peicheng saw that it was Lan Xiaoxue's phone.

I don't know why, Li Peicheng doesn't like Lan Xiaoxue to call at this time. He always feels guilty when he sees this call.

He was a little behind and picked up the phone.

After all, Liu Zhiyun is a well-educated and high-quality woman, and she will not interfere with Li Peicheng's phone call.

"Boss, will you come back for dinner tonight?" Lan Xiaoxue's voice came from the phone.

Li Peicheng smiled hoarsely. It turned out to be this matter, and he felt quite warm in his heart. People like him without parents since he was a child, except for a few people, no one will remember about his meals.

"Yes, I have an appointment in the evening."

Li Peicheng said with a smile.

Liu Zhiyun felt very good when she heard Li Peicheng say, "I have an appointment in the evening."

On this day, Li Peicheng and Liu Zhiyun didn't separate until eleven o'clock.

Because I was too late last night, I was busy moving for another day today, so when Li Peicheng returned to Wuzhuang, Lan Xiaoxue and the other two were already asleep.

It's different for three women to live in the house, and the whole room is spotless.

There are flowers in some places such as coffee tables, and warm little things in some corners.

As soon as Li Peicheng entered the house, he felt very warm.

Li Peicheng glanced in surprise, then fixed his eyes on the second bedroom with the door closed, shook his head slightly, and smiled.

When he went upstairs, Li Peicheng was surprised to find that his sheets were neatly folded, and there was still a faint fragrance in the room.

The clothes changed in the bathroom are also gone, including my own shorts.

Li Peicheng hurried out of the bathroom and opened the wardrobe. Everything was neatly in the wardrobe, emitting a fresh fragrance.

------------------------------I'm sorry, the code was overturned yesterday and I went back to work early in the morning, so I was late.

Today's third update, the second update is estimated to be at two or three o'clock in the afternoon.

Recommend your friend Fengmang's new book "Peerless Murderer", book number 1052663nk"