Definitions:
Parts per billion = ppb = ng/g, ng/mL
Parts per million = ppm = µg/g, µg/mL
Gram per Ton = g/ton
Common Conversions – Weight:
1 kg = 1000 g
1 g = 1000 mg
1 mg = 1000 µg
1 µg = 1000 ng
1 kg = 2.2 pounds
Common Conversions – Volume:
1 L = 1000 mL
1 mL = 1000 µL
29.6 mL = 1 oz
Common Conversions – Concentration:
1 ppm = 1000 ppb
1 % = 10,000 ppm
1 g/ton = 1.1 ppm