an argon atmosphere, as pure as possible

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Senior Member
Can I write so ...?Or is it just better by speaking?:confused:

The sample are melted in an argon atmosphere, as pure as possible.
  • entangledbank

    Senior Member
    English - South-East England
    Yes, that's fine in speech, though I think in scientific writing you might integrate it into the noun phrase: perhaps, in as pure an argon atmosphere as possible; or in an argon atmosphere of the highest possible purity.
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