The headspace (the remaining 50% air space) is purged with nitrogen to remove existing air, ensuring the measured H2Scap H sub 2 cap S comes only from the sample.
The method is designed for speed and consistency in field settings: Sample Collection astm d5705 pdf
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While D5705 is excellent for rapid field assessment, it is a "snapshot" measurement. It does not account for the total H2Scap H sub 2 cap S It does not account for the total H2Scap
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It paralyzes the olfactory nerve (destroying the sense of smell), making it impossible to detect by scent alone.
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