TERMIUM Plus®
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MICROGRAM PER CUBIC METRE [1 record]
Record 1 - internal organization data 2012-07-30
Record 1, English
Record 1, Subject field(s)
- Metrology and Units of Measure
- Analytical Chemistry
- Environmental Studies and Analyses
Record 1, Main entry term, English
- part per ten million
1, record 1, English, part%20per%20ten%20million
correct
Record 1, Abbreviations, English
- pptm 1, record 1, English, pptm
correct
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
The concentration of a contaminant refers to its quantity in the air. For gaseous contaminants, the concentration is expressed as a ratio of the volume of contaminants present in one billion volumes of air, or ppb. A similar unit is the parts per ten million, or pptm. One pptm consists of 100 ppb. For particulates, the concentration is expressed as a ratio of the mass of the particulates present in one cubic metre(m³) of air. The unit used for the mass is the microgram²(or µg), so the concentration is expressed in units of mg/m. 2, record 1, English, - part%20per%20ten%20million
Record number: 1, Textual support number: 2 CONT
Carbon monoxide concentrations are in units of parts per ten million (pptm). 3, record 1, English, - part%20per%20ten%20million
Record 1, Key term(s)
- parts per ten million
- part per ten millions
- parts per ten millions
Record 1, French
Record 1, Domaine(s)
- Unités de mesure et métrologie
- Chimie analytique
- Études et analyses environnementales
Record 1, Main entry term, French
- partie par dix millions
1, record 1, French, partie%20par%20dix%20millions
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- partie par 107 2, record 1, French, partie%20par%20107
proposal, feminine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
L'action de ce gaz est telle qu'il en suffit d'une partie par dix millions de parties d'air pour mettre un homme hors de combat dans l'espace d'une minute. 1, record 1, French, - partie%20par%20dix%20millions
Record 1, Spanish
Record 1, Textual support, Spanish
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