Question

Arsenic levels in groundwater are typically 200-500 µg/L in Bangladesh. Please convert this range to ppb. assume 1L of water is 1 kg.

Answer 1

1 ppb means one part in 1 billion. It can be converted into
`\mu g/kg` as follows:

`1 ppb=1\mu g/kg`

Also, 1 L is equal to 1 kg because density of water is 1 kg/L.

Thus,

`1 ppb=1\mu g/L`

The arsenic level in groundwater in Bangladesh ranges from
`200 \mu g/L` to
`500 \mu g/L`. This can be converted into ppb as follows:

`200\mu g/L=200 ppb`

and,

`500\mu g/L=500 ppb`

Therefore, the range in ppb is 200-500 ppb.