| ppm |
The number of "parts" by weight of a substance per million parts of water. This unit is commonly used to represent pollutant concentrations. Large concentrations are expressed in percentages.
출처: www.ec.gc.ca/water/en/info/gloss/e_gloss.htm
|
|---|---|
| ppb |
Units typically used in measuring the number of "parts" by weight of a substance in water; commonly used in representing pollutant concentrations.
출처: www.apsu.edu/wet/whatis.html
|
| PP |
a light, highly resistant plastic resin used in packaging, coating, pipes, and tubes.
출처: www.deq.state.or.us/wmc/solwaste/cwrc/glossary/glo...
|
| ppb |
Parts Per Billion. Refers to the concentration of a substance in a sample. For example, a concentration of five parts per billion (5 ppb) of benzene means there are five molecules of benzene present in the sample for every 999,999,995 molecules of other substances. The metric equivalents are:
출처: www.deq.state.or.us/wmc/cleanup/glossary.htm
|
| ppm |
Parts Per Million. Refers to the concentration of a substance in a sample. For example, a concentration of five parts per million (5 ppm) of benzene means there are five molecules of benzene present in the sample for every 999,995 molecules of other substances. The metric equivalents are:
출처: www.deq.state.or.us/wmc/cleanup/glossary.htm
|