According to the standards AK-ZV01 and SAE J1794, the particles emitted after the ignition of vehicle restraint systems must be characterized in terms of their mass and properties. In addition to the concentration of the total dust, the size distribution of the emitted particles, the proportion of respirable dust (PM10) and its chemical composition are important here.
In the GWP method, the total dust is classified into nine sizes between < 0,4 µm and > 9 µm using an Andersen impactor. If the amount is sufficient (> 50 mg), the collected dust can then be analyzed for various chemical parameters (soluble fraction, pH value, heavy metals). If requested by the customer, the morphology of the particles (nodular or fibrous, possible quartz content) can also be analyzed using an electron microscope.
Standards: AK-ZV 01; SAE J1794
