The result of your conversion between water [20°C] and nanogram/litre appears here
To convert between Water [20°C] and Nanogram/litre you have to do the following:
First divide 998.2 / 1.0E-12/0.001 = 998200000000.
Then multiply the amount of Water [20°C] you want to convert to Nanogram/litre, use the chart below to guide you.
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