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Calculating %, ppm, ppb, and ppt - Lingner Chemistry - Main Page
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日期：2025-06-06
Percent, ppm, ppb, and ppt page 1 Revised by D Lingner, 11/23/2009 Calculating %, ppm, ppb, and ppt Percent, ppm, ppb, and ppt, (parts per hundred, per million, per billion, and per trillion) are all fractions. They all refer to the part of something of i...看更多
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