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The use and abuse of the terms percent, parts per million and parts in 10n: Open letter to Messrs T J Quinn and I M Mills

P Giacomo

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The hybrid character of the terms percent, parts per million and parts in 10n means that we should refrain from using them in scientific language. A clear and precise statement of the quantity considered would in all cases allow its value to be expressed as a simple number.


PACS

06.20.F- Units and standards

06.30.Dr Mass and density

Subjects

Instrumentation and measurement

Dates

Issue 1 ( 1 February 2000)



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