Converting Occupational Exposure Limits from mg/m3 to ppm : OSH Answers
Measurement Units and Concentration Analogies 1 ppm = 1,000 ppb = 1,000,000 ppt 0.001 ppm = 1ppb = 1,000 ppt
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UNITS OF CONCENTRATION
SOLVED:The units of parts per million (ppm) and parts per billion (ppb) are commonly used by environmental chemists. In general, 1 ppm means 1 part of solute for every 10^6 parts of
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Converting Occupational Exposure Limits from mg/m3 to ppm : OSH Answers
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Parts-per notation - Wikipedia
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