Chapter 454: Test results that scare the police
Chapter 454: Test results that scare the police
Zhang Zhitong and the policemen were like a group of ignorant college students who stepped into the laboratory for the first time to watch the professor do an experiment.
Nervously and expectantly, they surrounded this German Goldman atomic absorption spectrometer.
The mystery of the concrete wall has been solved, and the remaining safe, as long as the puzzle is solved, they can more accurately locate the criminal's occupation according to the method of committing the crime.
The analysis time is a bit long this time.
Because the sample preparation of the atomic absorption spectrometer is relatively cumbersome, it is necessary to collect the test sample first, vaporize the sample, and use radiation projection to observe the spectrum generated when the sample absorbs radiation.
This is a very high-tech inspection method. With this inspection method, all foreign materials are invisible in the hole ablated by high temperatures.
Give a simple example.
When Ye Qing ate the altar chicken in Shanghai, he used the soil method to test that there were heavy metal residues in it.
If it is checked by an atomic absorption spectrometer, let alone a serious excess. Even if this altar chicken has eaten a harmful heavy metal food in its entire life, the spectrometer can detect it.
One hour later, the test result came out.
The report forms are all elements in English and symbols, and the technicians specially translated them into Chinese. The police, like treasures, looked at them one by one according to the elements inside.
Ferrous oxide, ferroferric oxide, aluminum oxide, nickel oxide, magnesium oxide, monocalcium aluminates, silica calcium carbonate...
From the test results, almost all the metal components on the safe were burned into another substance at high temperature.
The test results also indicate the proportion of these components in the sample, of which the proportion of iron is the largest, accounting for 55%.
"Wait, shouldn't the safe be made of metal? Why are there non-metallic substances such as monocalcium aluminates and silicon dioxide in it?"
A sharp-eyed policeman, Columbus was as excited as he discovered the New World and shouted: "These kinds of non-metallic substances are likely to be criminals, the key to destroying the safe."
"What kind of chemical reaction is used? I remember these ingredients can be used as chemical additives."
Several police officers in the trace evidence examination room immediately began discussing the uses of these non-metallic elements.
"Ahem~"
Ye Qing couldn't bear interrupting the policeman's "major discovery" and heated discussions with them.
"I think... these non-metallic substances are part of the foamed fire barrier material inside the safe."
"..."
The small circle from the trace evidence examination room suddenly became embarrassed in the heated discussion, and their hearts were cool.
"Ye Qing, in this way, isn't there any foreign element in the hole ablated at high temperature?" Zhang Zhitong was also confused. When metal is heated in the air, an oxidation reaction will occur.
Then a lot of the words "oxidized" on the test report sounded very high, but in fact, they are ordinary iron, aluminum, magnesium, and nickel, which become things after burning.
Ye Qing did not answer this question but continued to look at the test report.
Zhang Zhitong was right. The metal content in the report was one of the materials used to make the safe case, without any foreign matter.
Things seem to become unscientific.
There must be a medium in the combustion, which is ignited with a match, and residual elements such as phosphorus and sulfur will inevitably be detected in it. Ignite with mixed flammable gas, and it will inevitably leave the residual elements of common alkane gas, olefin gas, acetylene gas, etc.
This world belongs to science, there is no magic, and there is no cultivation.
Seemingly unscientific, it must have failed to find the true mystery.
The police were completely confused. They felt their IQ was no longer worthy to catch these mysterious criminals.
Someone looked down at the floor, others stared at the test report sullenly, and others sighed and leaned on their chairs, all of which were unconcealable frustration and disappointment.
"That's it."
Ye Qing suddenly showed a confident smile.
This sentence is more effective than a strong heart. The police hurriedly raised their heads and stared at Ye Qing without a moment's notice, and at the same time, they listened intently.
"There are no strange ingredients, but the original metal ingredients are not in the right proportions." Ye Qing pointed to the metal ingredients on the test report, and the corners of his mouth curled up: "Aluminum, magnesium, the ingredients are wrong. If we added aluminum to metal materials can increase the strength and corrosion resistance of the metal. However, the aluminum content in this report exceeds the standard."
"The wear-resistant steel used in safes is usually the Kn60 model. From the metal composition of this safe, it is also used. I remember that in this wear-resistant steel, the proportion of aluminum is only 3%, and in this test here Aluminum accounted for 15%. The proportion of magnesium added is even lower, it seems that it is less than 1%, but 5% is detected here."
So what alloy can we have from this composition of the metal?
While admiring the policemen couldn't help but wonder, what will happen if there were more aluminum and magnesium?
"Any kind of alloy formula is the best ratio value obtained after long-term practice and exploration. No factory will make this stupid mistake of mismatching. So, since the factory can't be wrong, it means the extra aluminum and magnesium were added by the band of thieves."
"Add aluminum and magnesium?" Zhang Zhitong frowned: "What do these people want to do?"
"Iron oxide should have been added, but there is too much iron in the safe enclosure, and there is not much change in the test report."
"Add iron?"
"Very brilliant concept.", Ye Qing admired: "This group of people is definitely not as ignorant in industrial processing, but very proficient, and can be called an engineer's level."
"Termite reaction or termite, use aluminum powder, iron oxide powder, mixed together, and use magnesium powder as an igniting agent. With a proper mixing ratio, it can produce a high temperature of more than 3,000 degrees after ignition. In industrial applications, this method will be used to melt refractory metals or metal welding."
Another unpopular technique was learned by them, and the policemen listened little by little. But Mr. Ye said that this method was generally used to melt metal or weld. It shouldn't be ablated, this kind of hole with bullets, right?
"High-pressure jet,".
Ye Qing said: "Mixed with extremely fine metal powder in a pressure vessel, the igniting effect is no less than the metal jet of an armor-piercing bullet. The finer the metal powder, the more fully it burns. Take the most common ordinary iron, and you can burn it for a lifetime with a lighter. But nano-sized iron powder can burn with a little fire. And nano-sized iron Fans can be bought online."
"For this group of industrial masters, burn through the shell of the safe and use a few small tools to pry open the internal mechanical lock structure."
"..."
My god, who is the engineer who ran to be a thief after he was full of knowledge? What kind of jewels are stolen with this technology? Go to the United States as a spy and steal high-tech information.
After listening to Ye Qing's popular science lesson, the policemen burst into tears. They felt these industry experts were terrible.
In case…
What would happen if an industrial talent like Mr. Ye did things that violated the law and discipline? This was very desperate speculation, but the policemen present thought about it again.
Mr. Ye casually took out one thing, which might be worth the price of one of their general administration buildings. It was tens of millions of gold and jewelry before their eyes, and the police felt relieved and at ease.
"This is going being a big deal that will shake up the internal system of the national police." After a long moment of the exclamation, Zhang Zhitong sighed, "I really have no confidence in catching them if I can find this kind of criminal means that I have never heard of."
"Try it and check the major universities and laboratories. Ordinary technicians do not have the ability to do this. If the ratio of the termite is ungood, it will become an incendiary bomb and burn yourself like a turkey."
Ye Qing also sighed: "With this technology, it would be a shame not to come to our factory to work and not become a thief."