Rivera and Behrentz 2009 found that ion concentration was between 3.5% and 8% of PM10 mass; they analysed the concentration of metals but did not analyse carbonaceous fractions which are the most significant fraction of PM10 mass.
Rivera y Behrentz 2009 adelantaron un análisis de metales y del componente iónico, donde este último parámetro estuvo entre el 3,5 y el 8% del total del PM10; sin embargo, no se caracterizaron las fracciones carbonáceas.