psychochemist

Chapter 84 New Discovery
Hearing Guo Na say that Yu Fan has a dog nose, everyone looked at Yu Fan with strange eyes.

Guo Na continued to explain: "When I was in BJ City, I saw it with my own eyes. Brother Yu can smell the composition of a chemical just by smelling it with his nose. It is very miraculous."

Chen Xingyang teased Yu Fan with an exaggerated smile: "Oh, I'm going to say, why are you so sharp, you are a dog after a long time?"

Yu Fan smiled helplessly and ignored them.He gently picked up the phone, concentrated, and once again used his sniffing skills, savoring it carefully for a while.

Everyone didn't get close to Yu Fan, deeply afraid that some smell on their body would disturb Yu Fan.

Yu Fan smelled it for a while, put down the phone, stayed for a few seconds, and then said with a slightly hesitant tone: "This should be the smell of engine oil."

Yu Fan picked up the phone and smelled it again, and his tone became firmer: "This should be the smell of motor oil, the unique greasy smell of high-lubricating oil. If there is no accident, the arsonist wiped off the dirt on the phone with his clothes in a hurry. Fingerprints, but accidentally rubbed motor oil from clothes on the phone."

Zi Yi continued to reason: "In this way, this person is likely to be a factory worker, and the working environment he comes into contact with will be stained with engine oil!"

Yu Fan handed the phone to Chen Wanli, and said, "Wan Li, can you see what clues you can find through this phone?"

Chen Wanli took the phone, plugged in the data cable, and began to study the phone.Yu Fan turned back and asked Zi Yi: "In this town, there are generally textile factories or garment factories, and the workers are generally relatively clean. Generally, only the clothes of workers in machinery processing factories are likely to get a lot of dirt on their clothes. Engine oil, what machinery processing plants are there in our town?"

Zi Yi walked to the town map on the clue wall, and pointed with his hand: "There is only this one, the Zhongkefeng Machinery Factory in the east!"

Guo Na exclaimed in surprise: "Then let's go directly to this machinery factory, maybe we will find something?"

Chen Xingyang looked at his watch: "It's only four o'clock now, we must have been able to catch some clues before we got off work in the past."

Yu Fan was not in a hurry, he asked Chen Wanli: "Wanli, how is it? Did you find anything on this phone?"

While fiddling with the mouse and keyboard, Chen Wanli said with some frustration: "This is a blank phone, which means it has been formatted. The sim card is also a black card. In addition to dialing Phone calls, nothing else."

Yu Fan bowed his head in thought, and muttered silently: "It seems that this arsonist has strong anti-reconnaissance ability and is also very rigorous in his work. This time we made a fuss, and he will be more cautious next time. It will be even more difficult for us to catch him. "

Chen Xingyang: "Then let's cut the mess quickly. Let's go directly to the machinery factory to see what tricks this kid can play. Before he is ready, let him be caught off guard first! That technical geek, let's open the headset If you have any new discoveries, you can directly contact the headset."

Yu Fan nodded, let's go and have a look first, then talk. Yu Fan, Chen Xingyang, Guo Na, and Zi Yi rushed to Zhong Kefeng Machinery Factory without stopping.I have to say that with the addition of Chen Wanli, many things are indeed much easier.

They have been on the run today, Yu Fan and the others know the importance of time, every minute and every second they wait, the danger of this small town will increase.If it's an ordinary criminal, knowing that the police are looking for them will pull them back, but for a psychopathic serial arsonist, knowing that the police are looking for him will only spur him on to commit crimes faster.The demon in his heart knows that his carrier has been exposed, so he will drain the last sliver of value from this emptiness faster!
Zhong Kefeng Machinery Factory has arrived.The four men divided into two groups, Chen Xingyang and Zi Yi went to find the person in charge of the factory to understand the situation, while Yu Fan took Guo Na straight to their raw material warehouse.

Guo Na was actually confused. She asked Yu Fan suspiciously: "Brother Yu, why are we going to the warehouse? Shouldn't we go find someone?"

Yu Fan said while trotting: "It's too late to explain, I want to confirm something!"

The warehouse arrived. Under the leadership of the warehouse manager, Yu Fan and Guo Na entered the warehouse, and Yu Fan went straight to the oil product area.There are about 20 large 200L iron drums stacked in the oil product area, including cutting fluid, lubricating oil, anti-rust oil and so on.

Yu Fan observed carefully, walked up and down, and then asked the storekeeper next to him: "Is all the oil products here?"

The storekeeper nodded: "All the oil products are here, and all the oil products are directly put into the warehouse."

Yu Fan bit his lip: "Oops, it's not here, go and tell Chen Jiayang and Zi Yi. Guo Na, let's go!"

Yu Fan ran towards the office area of ​​the factory, and happened to meet Chen Jiayang and Zi Yi coming down the stairs.Chen Xingyang also saw Yu Fan who was in a hurry, and said, "Old Yu, there are about [-] workers in this factory, and the factory manager is about to take us to the workshop and introduce us one by one."

Yu Fan stopped everyone and said to everyone: "I think the target we are looking for is not here at all!"

Everyone was surprised.

Yu Fan’s jogging all the way still made him breathless. Yu Fan stroked his breath and said: “The oil in the oil depot here does not add T321 sulfurized isobutylene, and the oil smell on the mobile phone has obvious sulfurized isobutylene. the taste of."

Guo Na came to his senses immediately: "Brother Yu, you went to the oil store for the first time just now, just to see if the oil they use here is the oil left on the mobile phone, right?"

Yu Fan nodded affirmatively to Guo Na, and continued to explain to everyone: "T321 is a sulfur-containing additive made from sulfur or sulfur monochloride and isobutylene. The sulfur-containing additive is used in metal-to-metal high-pressure contact in boundary lubrication. Provide protection. The extreme pressure and antiwear performance of sulfur-containing extreme pressure antiwear agent is related to the CS bond of sulfide. The weaker CS bond is easier to form a protective film and has better antiwear effect. The currently used sulfide Most of the extreme pressure and antiwear additives are sulfurized isobutylene."

Guo Nabang Yufan added: "The lubricating oil added with T321 sulfurized isobutylene generally has stronger lubricating performance, and their application scenarios are generally gear oil, anti-wear guide oil, extreme pressure cutting oil, etc."

Yu Fan felt that the cooperation between himself and Guo Na became more and more tacit, and Yu Fan continued to explain: "So there will be no one we want to find here. I strongly suspect that the oil on the arsonist's clothes came directly from the equipment oil. The person who came into contact was not contacted during the machining process. He is not an ordinary operator! Combined with the characteristics of this person before, he has certain hands-on ability and technical ability. I strongly doubt that he should be a worker in a certain factory in this town. equipment maintenance personnel!"

Everyone's brains are racing.Yu Fan: "Guo Na, please make a list of the types of oils containing isobutylene sulfide and give it to Zi Yi, and ask them to go to various factories to check which factories use these oils."

Chen Xingyang was a little anxious beside him: "It's past five o'clock now, many factories are off work, and this investigation will take a long time, what should we do? If he sets fire again tonight, we can do something about it." It's all gone."

Yu Fan showed a strange smile: "Don't wait for him to set the fire, I'll help him add fire."

　The most precious thing is "today" - isobutylene sulfide
　　
　
(End of this chapter)