Jump to content
Toggle sidebar
Search
Create account
Log in
Personal tools
Dark mode
Create account
Log in
Pages for logged out editors
learn more
Contributions
Talk
Navigation
Main page
Recent changes
Random page
Help about MediaWiki
Tools
What links here
Related changes
Special pages
Page information
Editing
CEGS
(section)
Page
Discussion
English
Read
Edit
Edit source
View history
More
Read
Edit
Edit source
View history
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
==== Extraction ==== After pretreament, the sample's carbon must be separated from the rest of the sample material. To obtain an accurate analysis, all non-sample carbon, such as CO<sub>2</sub> from the air, must be excluded. A vacuum system is usually employed to remove air, and carbon-free gases such as research-grade oxygen, helium, argon, or nitrogen are introduced to participate in the extraction. The collected carbon must come exclusively from the sample material. Moreover, all of the the sample's carbon must be collected. Due to fractionation effects, an incomplete or partial carbon extraction can compromise the result as well. The technique for liberating the carbon from pretreated material varies based on the type of sample, but most commonly it is either combusted (burned) or digested in acid. In either case, oxygen combines with the carbon to form carbon dioxide (CO<sub>2</sub>). Other chemical reactions usually take place simultaneously, so steps are taken to remove unwanted reaction products, such as water, sulfur and halogen compounds, nitrogen oxides, and so on. To summarize in simple terms, extraction consists of carbon {{HoverText|Getting the carbon out of the sample.|liberation}}, CO<sub>2</sub> {{HoverText|Capturing the liberated carbon dioxide.|collection}}, and {{HoverText|Removing everything else, except oxygen.|purification}}.
Summary:
Please note that all contributions to Aeon HACS Wiki may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see
Aeon HACS Wiki:Copyrights
for details).
Do not submit copyrighted work without permission!
Cancel
Editing help
(opens in new window)