![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 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](https://cdn.numerade.com/previews/34749ba9-cda5-4d9d-a1bf-e447ca902ac1.gif)
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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![Tokyo Metropolitan Government food safety FAQ | Food Hygiene Help Desk|Tokyo Metropolitan Government initiatives and systems Tokyo Metropolitan Government food safety FAQ | Food Hygiene Help Desk|Tokyo Metropolitan Government initiatives and systems](https://www.hokeniryo.metro.tokyo.lg.jp/shokuhin/eng/faq/images/q5hyou2.png)
Tokyo Metropolitan Government food safety FAQ | Food Hygiene Help Desk|Tokyo Metropolitan Government initiatives and systems
![Tokyo Metropolitan Government food safety FAQ | Food Hygiene Help Desk|Tokyo Metropolitan Government initiatives and systems Tokyo Metropolitan Government food safety FAQ | Food Hygiene Help Desk|Tokyo Metropolitan Government initiatives and systems](https://www.hokeniryo.metro.tokyo.lg.jp/shokuhin/eng/faq/images/Q5.jpg)
Tokyo Metropolitan Government food safety FAQ | Food Hygiene Help Desk|Tokyo Metropolitan Government initiatives and systems
A 1 gram of salt in 1 m3 of solution hasconcentration of 1 ppm.ppm is defined as number of parts by mass ofsolute per million parts of solution.
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