“…Mild steel and brass were rapidly dissolved 23 by first creating a colloidal suspension in 5-10 ml of water by spark ablation followed by the addition of 100 ml of concentrated acid. On-line leaching of Fe from iron ore 24 was followed by determination by molecular absorption spectrometry; As was determined in soils by on-line microwaveassisted leaching from an injected slurry followed by HG-AAS; 25 and Cd, Cr, Mn, Ni and Pb were determined by ICP-MS 26 following microwave-assisted extraction in a system which incorporated a double pumping action instead of a backpressure regulator. Problems associated with dispersion and dilution of the acid were also addressed.…”