Guidelines for measuring and reporting particle removal efficiency in fibrous media.

Nat Commun · 2023 · PMC10474009 · PMID 37658063

Europe PMC DOI

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might be significantno p-value reported

Hence, the difference between the PM 2.5 values provided by a reference method or instrument and other reported PM 2.5 concentration values might be significant.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.