Chapter 8 rhetorical question
I don't know how to explain this phenomenon. Every time I stand at the scene, the incident may appear in front of my eyes.
Suddenly, the teacher fell straight down, hitting his head on the table in the laboratory, making a dull sound; some timid girls screamed in fright, and most of the students ran away without knowing where they were; the classroom was in chaos for a while. A pot of porridge... I went back to the scene - now the classroom has quieted down, the teacher died at the back of the classroom, leaving a scalp injury on his head caused by the impact with the experiment table; Broken test tubes and beakers; a window in the laboratory was smashed, and it seems that many students escaped through the window.
The cause of death was not difficult to determine.
The experimenter who manages the drug in the laboratory reported that what he did today was an experiment that required the catalysis of potassium cyanide. This poison is so famous that we have done enough research on it, and its behavior is so typical— —Because this poison will quickly inhibit the utilization of oxygen in tissues, although oxygen can continuously enter the human body, it cannot be consumed, so the body of the deceased will show a bright red color (the opposite of the dark purple caused by blood hypoxia) ).
I determined almost immediately that the deceased had died from potassium cyanide poisoning.
However, the teacher who repeatedly told the students to be careful of poisoning (the school is facing a big enemy when doing this experiment every semester), how could he be poisoned instead?How did the poison get into his body, suicide?He killed?Accident?My brain is spinning fast.
Still, I need to find evidence from the dead.
I found a well-ventilated area, told everyone to leave, put on a gas mask, and started the autopsy.
Potassium cyanide is so poisonous that I have seen reports of autopsy personnel dying from inhaling the gas that accumulated in the cranial and thoracic cavities.
I can't help admiring those who "eat fugu desperately", because fugu is more poisonous than potassium cyanide, and high temperature cannot destroy the fugu poison of protein components.
This is a middle school chemistry teacher (after the incident, the school canceled the content of the experiment). He had rubber gloves on his hands, so absorption through the skin seemed unlikely, but I also found no traces of cyanide in the digestive tract: no corrosion in the esophagus and stomach, and no cyanide in the food residue in the stomach. Chemicals, on the contrary, the respiratory tract has some signs of irritation: pulmonary congestion and edema are obvious. Is it from the respiratory tract?Is potassium cyanide a solid?I searched for a while on the Internet, hydrocyanic acid!My eyes lit up. I immediately ran back to the school laboratory, and sure enough, there was a waste liquid tank directly opposite the place where the teacher died, and I didn't know what was in it. As soon as the PH test paper is tested, the PH value is less than 2, which is a strong acid!Now I understand, it turned out that the teacher poured the potassium cyanide after the experiment into the waste liquid pool, and it reacted with the strong acid in the waste liquid pool to produce volatile and highly toxic hydrogen cyanide!I couldn't help but get scared. Fortunately, the classroom has ventilation equipment, and fortunately, the students ran out without knowing it, otherwise... I dare not think about it. As the old saying goes, "A good swimmer dies from drowning." When you think you have mastered the laws of nature, nature may suddenly ask you: "Have you really mastered it?"
This is a middle school chemistry teacher (after the incident, the school canceled the content of the experiment). He had rubber gloves on his hands, so absorption through the skin seemed unlikely, but I also found no traces of cyanide in the digestive tract: no corrosion in the esophagus and stomach, and no cyanide in the food residue in the stomach. Chemicals, on the contrary, the respiratory tract has some signs of irritation: pulmonary congestion and edema are obvious. Is it from the respiratory tract?Is potassium cyanide a solid?I searched for a while on the Internet, hydrocyanic acid!My eyes lit up. I immediately ran back to the school laboratory, and sure enough, there was a waste liquid tank directly opposite the place where the teacher died, and I didn't know what was in it. As soon as the PH test paper is tested, the PH value is less than 2, which is a strong acid!Now I understand, it turned out that the teacher poured the potassium cyanide after the experiment into the waste liquid pool, and it reacted with the strong acid in the waste liquid pool to produce volatile and highly toxic hydrogen cyanide!I couldn't help but get scared. Fortunately, the classroom has ventilation equipment, and fortunately, the students ran out without knowing it, otherwise... I dare not think about it. As the old saying goes, "A good swimmer dies from drowning." When you think you have mastered the laws of nature, nature may suddenly ask you: "Have you really mastered it?"