Total phosphorus (S31)

Total P Microwave Procedure: digest 0.5 g of air dried soil with 10 mL of HNO3 in a 50 mL quartz vessel using microwave digestion for 6.5 minutes at 175oC. Determination of P, K, Na, Ca, Mg, Al, B, Fe, Mn, Cu, Zn, Cd, Ca, Ni, Pb, Co, Mo, Si, S, As, Ti, Be, Sr, Rb, Li, V, and Ba by ICP-AES.

(See Method Reference No. 25)