Conan: The Mechanic

"I'll go in first, and if there's no problem, I'll let you in in twenty seconds."

Standing at the door of Yoshiyuki Kono, he opened the apartment door with the key found from Yoshiyuki Kono. Gregory turned around and said solemnly to Chiba and Haibara.

"So is there still danger here?" Qian Yu's mouth twitched.

"The high dose of poison gas is definitely gone," Gregory said as he entered the apartment. "The windows of their house are open - Yoshinori Kono has been arrested, and his wife has been taken to the hospital with symptoms of poisoning before, so she must have been ventilated for more than five hours - -Poison gas is heavier than air, so since the policeman downstairs is still alive, it means that even if Kono Yoshiyuki opens some poison gas valve or something before he leaves, the amount of poison gas here will not be particularly high."

"Then you made us cover up so tightly..." Chiyu said, and stretched out her hands that had been in her pockets before—a pair of plastic gloves with elastic bands around the cuffs. "And you have to wear clothes like that inside..."

Although on the surface it looks like Qianyu is just wearing a gas mask, in fact, he has put on protective clothing all over his body - airtight protective clothing from head to toe, even if there is really sarin gas residue, he will be isolated in the protective clothing outside.

"If you were my full-time assistant, I would definitely not prepare this for you," Gregory replied. "After all, those assistants signed the life and death certificate."

"Uh..." Qianyu was speechless. "Although you made me and Hai Yuan's clothes uncomfortable... but I suddenly felt that it was better to wear..."

"It's good to know," Gregory said. "Well—it's been twenty seconds now, come in."

Kono Yoshiyuki's home.

"There doesn't seem to be anything strange," Gregory looked at the scene in the room. "Where are you?"

"If you consider that there are many working people who don't like to tidy up their houses, so there will be a lot of messy places..." Chiba stood in Kono Yoshiyuki's bedroom, frowning. "Nothing unusual, just bad."

At this moment, Chiba suddenly heard a disturbing sound coming from the toilet belonging to this bedroom.

"Oh!" Then, Haibara Ai's small exclamation came.

"What's wrong?" Qianyu hurried to the toilet, only to find that Haibara Ai had already withdrawn from the toilet, and there was no panic in her expression.

Looking into the toilet, Qianyu found that the cover of the sewer was opened, and a small pool of liquid was boiling outside the opening of the drain, making a "crackling" sound.

"What did you do?" Qian Yu was stunned.

"What he put in a toilet with a corroded iron sewer pipe was kitchen cleaner," Ai Haibara replied. "You give me a reason not to be curious."

"Kitchen cleaner?" Qian Yu was stunned. "Are you sure it's kitchen cleaner?"

"Yes," Haibara Ai shrugged. "So I just poured a little bit, and that's it."

"Tsk..." Qian Yu looked at the sewer and pouted.

Because kitchen cleaners are used to deal with kitchen stains, and kitchen stains are basically acidic substances such as grease, so kitchen cleaners are alkaline cleaners. Generally speaking, toilet cleaners are faced with alkaline stains, so they are generally acidic. However, because strong acid cleaners can damage pure iron sewers, alkaline cleaners are sometimes used to treat bathroom sewers.

But if an alkaline-cleaning drain develops eye damage, consider whether someone has recently started using alkaline-cleaning drains.

"Have you found any new pesticides there?" At this moment, Gregory came over. "Um...it's work time, not flirting time."

"Mr. Yoshiyuki Kono recently changed his alkaline cleaner to clean the sewers," Ai Haibara said. "Maybe he poured the undiscovered part of the organophosphorus pesticides found before, so he used alkaline cleaners to prevent us from dismantling the ground here, and after checking the sewer walls, it was possible that other types of pesticides were left on it. sex."

"Don't think about that for now," Gregory replied. "There are no sealable containers made of copper, lead, wax, plastic, or the like. It's easier to store pesticides than to store them."

The reaction process of sarin gas is quite complicated - not because the reaction process of sarin gas is complicated, but because it is difficult to obtain pre-materials without a background.

First, chlorine gas reacts with excess phosphorus to obtain phosphorus trichloride; trichloromethanol plus methanol that can be bought anywhere can react to obtain dimethyl phosphite, and after reheating, monomethyl methphosphate can be obtained; Phosphorus trichloride and chlorine can be reacted to obtain methyl oxyphosphorus dichloride; then the hydrofluoric acid and methyl oxyphosphorus dichloride generated by the reaction of calcium fluoride and concentrated sulfuric acid can be used for metathesis to obtain methyl oxyphosphorus dichloride. Phosphorus fluoride; Isopropyl methylfluorophosphonate can be obtained by adding isopropyl alcohol and methyl oxyphosphorus dichloride again~www.wuxiaspot.com~ In this process, there is a step that has quite strict requirements for the container - fluorine In the process of adding calcium sulfate and concentrated sulfuric acid to form calcium sulfate and hydrofluoric acid, both the reaction vessel and the collection vessel are exquisite.

The reaction vessel must be constructed of a relatively inert material with mobility behind hydrogen, otherwise the reactants will react with the reaction vessel. The collection container must be made of a metal material or a material such as wax or plastic that is mobile behind the fluorine. (Considering the psychology of normal people, copper is generally used as a reaction container and lead is used as a collection container when storing this dangerous substance.)

But there are no such containers—especially no sealable containers that can be used to collect hydrofluoric acid. If Kono Yoshiyuki got rid of the containers, why didn't he get rid of the apparently more conspicuous pesticides?

"In other words, there are no production conditions here?" Ai Haibara said with her arms crossed.

"I don't think he's productive," Gregory replied. "Any laboratory that can safely produce sarin has better conditions than what can be found here, even after being destroyed. And although there are many kinds of pesticides here, there are not many parts that can really be used, and I'm very skeptical that the doses found here will produce enough sarin to produce that kind of killing efficiency in the open."

At this point, Gregory had already gone out. "Let's go back, there is basically no particularly valuable information here."