Table 2-1N: US-EPA Method 3050B Standard Method
US-EPA Methods 3050B (A14)
Acid Digestion of Sediments, Sludges, and
Soils
Type |
Matrix |
Analytes |
Detection |
Control |
Microwave Acid Leach |
Sediment Sludge Soil |
Al, As, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Mo, Na, Ni, Pb, Se, Tl, V, Zn |
FAAS ET-AAS ICP-AES |
Temperature Feedback Control or Calibration |
Condensed Procedure |
1 g sample and 10 mL 1:1 HNO3 Performance Criteria: 2 min. to 95°C, 5 min. at 95°C, Cool for 5 min. 5 mL HNO3, 2 min. to 95°C, 5 min. at 95°C, cool for 5 min. 5 mL HNO3, 2 min. to 95°C, 5 min. at 95°C, cool for 5 min. Slowly add 10 mL H2O2, 6 min. to 95°C, 5 min. at 95°C, cool for 5 min. Add 5 mL HCl and 10 mL H2O, 2 min. to 95°C, 5 min. at 95°C Prescription Settings: 80 W for 2 min, 30 W for 5 min, cool add 5 mL HNO3, 80 W for 2 min, 30 W for 5 min, cool add 5 mL HNO3, 80 W for 2 min, 30 W for 5 min, cool add 3 mL H2O2, 40 W for 5 min add 3 mL H2O2, 40 W for 5 min add 4 mL H2O2, 40 W for 5 min, 5 min cool add 5 mL HCl and 10 mL H2O, 80 W for 2 min, 30 W for 5 min. |
