Final answer:
To calculate ambient SPM concentration, the mass of particulates collected and the volume of air sampled are needed. This data, along with average pressure, allows for volume correction to STP, and the concentration is found using the SPM concentration formula.
Step-by-step explanation:
To calculate the ambient Suspended Particulate Matter (SPM) concentration from field data obtained in a high-volume sampler, you would need additional information that typically includes the volume of air sampled and the mass of particulates collected. The formula used for calculating the SPM concentration is:
SPM concentration (in µg/m3) = (Mass of particulates collected (in µg)) / (Volume of air sampled (in m3))
The average pressure of the day at the station level is required to correct the volume of air sampled to standard temperature and pressure conditions (STP). Without the raw data of mass and volume, the concentration cannot be calculated. However, once you have this data, you would adjust the volume of air based on the station pressure compared to sea level standard atmospheric pressure, and then apply the formula to determine the SPM concentration.
Here's an example: If you collected 300 µg of particulates, and the volume of air sampled was 500 cubic meters (corrected to STP), the SPM concentration would be:
SPM concentration = 300 µg / 500 m3 = 0.6 µg/m3
Remember that accurate measurements and careful data handling are crucial to achieve reliable results for SPM concentrations.