Query: What weight of a particular substance would be needed to produce a 2 parts per million concentration within 10kg of a compound substance?
Response: The ‘part per million’ (ppm) measure is very popular in North America, but only widely used within the scientific community in the UK.
Anyone who has tried to add santising chemicals to a swimming pool or hot tub will be already used to calculating quantities in ppm.
1 ppm equates to 1mg out of every 1kg
So, by proportion, this leads to…
2 ppm equating to 20mg out of 10kg.
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