Lunar Soil is about to debut at the National Expo. The distance between you and scientific research is only the analytical instrument

【Hot attention from Chemical Machinery and Equipment Network ] On February 22, the precious lunar soil samples brought back to the earth by Chang'e-5 arrived at the National Expo and will be displayed to the public in March.
This will be our first close encounter with the "local products" from the moon.

 

In space*, human aircraft have repeatedly landed on the moon and brought back lunar soil samples.
In particular, the US "Apollo" program, starting from Apollo 11, 12 astronauts who landed on the moon successively collected about 381.
7 kilograms of lunar soil and lunar rock samples on the lunar surface.
my country only received 1 gram as a national gift in the 1970s.
After the successful return of Chang'e 5 in December 2020, my country finally has its own lunar soil sample, which is as much as 1,731 grams.
This is also a new sample brought back by humans from the moon after the lunar landing sampling plan fell silent in 1976.

 

The study of lunar soil samples is of great significance.
Humans can learn about the formation and evolution of the lunar crust from lunar soil samples and compare and study the early evolution of the Earth.
The moon is rich in energy and mineral resources.
By studying the lunar soil, humans can determine the content of important resources such as ilmenite, helium-3, and hydrogen on the moon, and carry out related studies on the extraction of helium-3 and the mineralization mechanism of ilmenite.
Provide a theoretical basis for the development and utilization of lunar resources.
At the same time, the lunar soil covers the surface of the moon, and its physical and mechanical characteristics will affect the landing of the lander.
Studying the particle composition, density, porosity, bearing capacity and other characteristics of the lunar soil can make targeted improvements to the lander, reduce landing impact and increase stability during lunar landings, and prepare for subsequent lunar landings and even the establishment of a lunar base .

 

　　The lunar soil sample brought back by Chang'e-5 is more precious than before, not only because it is a new sample-better storage and transportation technology can ensure that the new sample is less affected and polluted by the global environment, but also Because the samples collected by Chang'e 5 are "younger," with a formation time of less than 2 billion years, and the sampling location is near a volcano named Rumke, it can provide researchers with more information on lunar volcanic activity and verify each A basic assumption about the moon.

 

　　1731 grams may seem very small, but for modern*There are enough analytical instruments .
Therefore, in addition to collection and scientific research, we have the remaining lunar soil that can be used for public exhibitions.
This is probably the time when an ordinary person is close to the moon, and the distance from the scientific research personnel is only the analytical instrument in the laboratory.

 

　　Due to the difficulty of obtaining lunar soil samples, the first consideration for lunar soil analysis is non-destructive analysis methods, such as using a microscope to observe the surface morphological characteristics of lunar soil particles, using spectral analysis instruments, X-ray analysis instruments, etc.
to analyze the mineral and chemical composition of the lunar soil.
Qualitative and quantitative analysis.
In addition, some detrimental chemical composition analysis is required.
At this time, it is necessary to consider as much as possible to obtain more useful information with less sample amount.
Microanalysis techniques such as laser ablation inductively coupled plasma mass spectrometry, microlaser Raman spectroscopy, and nano-ion probe technology are good choices.

 

　　Before Chang'e-5, the lunar soil sample used in our country for research was only 0.
5 grams, and most of the research was carried out by simulating the lunar soil.
Although the simulated lunar soil is similar in shape, size, and composition to the lunar soil particles, it is ultimately formed on the earth and the similarity is limited.
The new lunar soil will provide a large number of precious samples for our country's research.
Except for some resource utilization experiments that need to consume a lot of samples, it still needs to be replaced by simulated lunar soil.
my country has enough confidence to advance the study of the moon.

 

　　The lunar soil that will be exhibited in the National Museum is a sign of the successful conclusion of the three-step "circumnavigation, landing, and return" of my country's lunar exploration project, and it will also make a huge contribution to the subsequent "exploration, landing, and stationing" plan.
We have the opportunity to see the soil from the moon with our own eyes, and we will also witness the beginning of a new era in our country to land on the moon.

 

　　Original title: Lunar Land is about to debut at the National Expo.
The distance between you and scientific research is only the analytical instrument