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Measuring Low Concentrations

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Link Title: Measuring Low Concentrations Open in a new window
Link URL: http://www.cefic.org/metricscale/low_concentration.htm
Link Details: Explains with many examples the question of "What do ppm, ppb, ppt and ppq stand for?"
Category: Top : Science : Reference : Units_of_Measurement
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Measuring Low Concentrations