Concentrations obtained with PTFE filters tended to be higher than those obtained with quartz filters in Carvajal Figure 3, which was probably due to the loss of fibres from the 47-mm quartz filters during filter handling.
Las diferencias en los puntos de Suba y Carvajal se concentraron en regiones temporales específicas, lo cual hace suponer que se cometió un error gravimétrico en ese periodo de tiempo.