Figure 4From: The effect of refurbishing a UK steel plant on PM10 metal composition and ability to induce inflammationThe measured metal content of 7 day PM10 samples collected before, during and after closure (* p < 0.05 compared to closure period). Extracts were made into ultra pure water (aqueous extract) followed by digestion of the remaining filter in HCl:HNO3(acid extract). Measurements were conducted by ICP-MS and values are the mean of 2 samples ± SEM.Back to article page