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High Spatial Resolution Samplers performance evaluation
A study has been conducted by the Institute of Atmospheric Pollution of the National Research Council of Italy to evaluate the performances of the HSRS sampler
This study was aimed to evaluate:
1. the repeatability of the measurements of PM and of some of its chemical components when the sampling is carried out by the HSRS sampler;
2. for the same species, the difference in the concentration calculated when sampling with the HSRS sampler in comparison with instruments operating at the flow rate of 2.3 m3 h-1, certified according to the European legislation;
3. the existence and extent of possible artefacts when the sampling is carried out by the HSRS sampler.
Results:
The repeatability of the samplings carried out by the low-cost samplers was about 5%.
The comparison with the reference sampler was very good for stable, fine components (e.g.: sulphate, potassium, levoglucosan, elements) and satisfactory for stable coarse components (e.g.: sodium, magnesium, calcium).
Spatially resolved data, obtained by monthly sampling in parallel , allowed to assess the spatial variability of PMx and elemental mass concentrations.
The obtained results proved the efficiency of the innovative and low-cost experimental procedures for the evaluation of the spatial variability of PMx and its main chemical components through the acquisition of spatially resolved data.
