Question

if you sampled for dust using the sampling pump in the previous problem for 480 minutes, what is the concentration in mg/m³ if the pre-weight of the filter is 47 mg and the post-weight is 55 mg?

Answer 1

The concentration of dust in mg/m³ is 1 mg/hour.

Step-by-step explanation:

To calculate the concentration of dust in mg/m³, we need to use the formula:

Concentration = (Post-weight - Pre-weight) / Sample volume

Given that the pre-weight of the filter is 47 mg, the post-weight is 55 mg, and the sampling time is 480 minutes, we need to convert the sampling time to hours:

Sampling time in hours = 480 minutes / 60 minutes/hour = 8 hours

Now we can calculate the concentration:

Concentration = (55 mg - 47 mg) / 8 hours = 1 mg/hour

Therefore, the concentration of dust is 1 mg/m³.