Draeger
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Posts: 185
Registered: 31-1-2020
Location: North-Rhine Westfalia, Germany
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Mood: Slowly getting ready for new projects
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Removal of superfine copper particles from stir bar
Today I got some superfine copper particles stuck in the Teflon coating of the stir bar and it doesn't go off by a paper towel or scratching, and I
have no nitric acid.
Is there any other way to remove them?
Collected elements:
Al, Cu, Ga, C (coal), S, Zn, Na
Collected compounds:
Inorganic:
NaOH; NaHCO3; MnCl2; MnCO3; CuSO4; FeSO4; aq. 30-33% HCl; aq. NaClO; aq. 9,5% ammonia; aq. 94-96% H2SO4; aq. 3% H2O2
Organic:
citric acid, sodium acetate, sodium citrate, petroleum, mineral oil
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Ubya
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Location: Rome-Italy
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Mood: I'm a maddo scientisto!!!
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Quote: Originally posted by Draeger  | Today I got some superfine copper particles stuck in the Teflon coating of the stir bar and it doesn't go off by a paper towel or scratching, and I
have no nitric acid.
Is there any other way to remove them? |
acetic acid + H2O2
HCl + H2O2
H2SO4 + H2O2
any acid and an oxidizer pretty much
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feel free to correct my grammar, or any mistakes i make
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Draeger
Hazard to Others
Posts: 185
Registered: 31-1-2020
Location: North-Rhine Westfalia, Germany
Member Is Offline
Mood: Slowly getting ready for new projects
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| Quote: Originally posted by Ubya | | Quote: Originally posted by Draeger | Today I got some superfine copper particles stuck in the Teflon coating of the stir bar and it doesn't go off by a paper towel or scratching, and I
have no nitric acid.
Is there any other way to remove them? |
acetic acid + H2O2
HCl + H2O2
H2SO4 + H2O2
any acid and an oxidizer pretty much |
Oh wow, didn't think it'd be that easy. Thanks.
I know what the other two reaction products with H2O2 are, but what does acetic acid and H2O2 make?
Collected elements:
Al, Cu, Ga, C (coal), S, Zn, Na
Collected compounds:
Inorganic:
NaOH; NaHCO3; MnCl2; MnCO3; CuSO4; FeSO4; aq. 30-33% HCl; aq. NaClO; aq. 9,5% ammonia; aq. 94-96% H2SO4; aq. 3% H2O2
Organic:
citric acid, sodium acetate, sodium citrate, petroleum, mineral oil
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Syn the Sizer
National Hazard
Posts: 600
Registered: 12-11-2019
Location: Canada
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I believe it is just a solution of H2O2 and acetic acid. The H2O2 helps produce an oxide layer for the
acid to attack.
[Edited on 2-7-2020 by Syn the Sizer]
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symboom
International Hazard
Posts: 1143
Registered: 11-11-2010
Location: Wrongplanet
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Mood: Doing science while it is still legal since 2010
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Everyone is forgetting ammonia and air by shaking them in solution to make them soluble in ammonia as a complex nice and cheapest.
[Edited on 2-7-2020 by symboom]
[Edited on 2-7-2020 by symboom]
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