Table 2-1O: US-EPA Method 3051 Standard Method
US-EPA Method 3051 (A15)
Microwave Assisted Acid Digestion of Sediments,
Sludges, Soils, and Oils
Type |
Matrix |
Analytes |
Detection |
Control |
Microwave Acid Leach |
Oil Sediment Sludge Soil |
Al, Ag, As, B, Ba, Be, Ca, Cd, Co, Cu, Cr, Fe, Hg, K, Mg, Mn, Mo, Na, Ni, Pb, Sb, Se, Sr, Tl, V, Zn |
FAAS ET-AAS ICP-AES ICP-MS |
Temperature Feedback Control or Calibration |
Condensed Procedure |
0.25 - 0.5 g sample and 10 mL HNO3 (max 0.25 g for Oil) Performance Criteria: Heat to 175°C in less than 5.5 min. Maintain 175-180°C for remainder of 10 min Prescription Settings: For six 120 mL PFA vessels 574 W for 10 min For two 120 mL PFA vessels 344 W for 10 min |
Note: Nitric acid alone has been reported to be insufficient to stabilize antimony (Sb) (A16-19). Currently this method is being extended to include HCl to more accurately replicate the leaching of EPA Method 3050B which uses HNO3, HCl, H2O2, and H2O. |