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neptunium
National Hazard
Posts: 989
Registered: 12-12-2011
Location: between Uranium and Plutonium
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Rubidium 87 played an important role when measuring its concentration next to Strontium 87, The ratio can be used for dating earth and space rock.
Using the Nexion 5000 mass spectrometer form my old job, I was able to analyze it from a chunk of chondrite purchased on ebay.
The nice thing about isotopic ratio is that you dont even have to weight anything, it does not matter how much of the sample you use as long as you
just want to determine the ratio, And using the Sr/Rb system I`ve got 3.78 billion years old.
I used other systems in this video, Some are better than others but they all hover around roughly the same age. Which is nice. The isochron method
requires several analysis from different minerals found in the same rock and as you would expect the isotopic ratio is not very different, which can
lead to errors . This was still a very cool project and I hope you enjoy it as much as I did
https://www.youtube.com/watch?v=d2VxKPYaXeo
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Crazy_Chemist
Harmless
Posts: 19
Registered: 22-7-2019
Location: Europe
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Mood: Radioactive
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I can't measure something from my ampoule with rubuídium with my gamma-scout.
Amateur chemist, just for fun!
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neptunium
National Hazard
Posts: 989
Registered: 12-12-2011
Location: between Uranium and Plutonium
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why do you sound surprised ?
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Tsjerk
International Hazard
Posts: 3032
Registered: 20-4-2005
Location: Netherlands
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Mood: Mood
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Strontium is also used to determine the traveling of ancient humans, as the strontium in their teeth was deposited during their youth. When the amount
of strontium found is different from what is found in the surrounding area, there must have been traveling involved.
https://www.google.com/amp/s/theconversation.com/amp/where-d...
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