Pressure assisted chelating extraction: a novel technique for digesting metals in solid matrices.

摘要: This work describes a novel technique for the digestion of metals in solid matrices. The is called pressure assisted chelating extraction (PACE). In typical procedure, sample placed stainless steel cell and mixed with appropriate agents. Using programmed sequence temperature, static time, thermal equilibration available ASE 200TM, metal removed under moderate temperature (up to 200 °C) 3000 psi). PACE achieves recovery that equivalent wet techniques also provides clean safe operation by substituting strong acids commonly used during It uses less solvents significantly time (minutes vs. hours) digestion. has been validated using certified standard reference materials (SRMs) including industrial sludge, buffalo river sediments coal fly ash. total time required remove was ∼20 min. Results show system an ideal platform efficient, rapid, Good agreement between measured values Pb, Mn, Cu were found recoveries averaging 80 101% relative deviation than 5%. approach may provide alternative environmental samples, alloys, biological samples geological importance. potential advantage offered lies non-destruction sample, automation exclusion concentrated mineral procedure.