土壤中有效态镍、钻、铜用偏酸性溶液和络合剂溶液浸取;有效态硫用弱碱性溶液浸取,电动振荡1.5h。浸取液用原子吸收法测定镍、钻、铜,比浊光度法测定硫。由热力学自由能计算和化学物相分析证明,土壤中有效态Ni、Co、Cu和S均系硫化物转变成硫酸盐后被浸出。 Effective nickel, diamond and copper in the soil were leached with a solution of partial acid and complexing agent; the effective sulfur was leached with a weak alkaline solution and electroexpond for 1.5 h. Leaching solution - Determination of sulfur by atomic absorption spectrophotometry with nickel, cobalt, cobalt and. Calculated from the thermodynamic free energy calculations and chemical phase analysis, it is proved that the effective Ni, Co, Cu and S in the soil are all leached out after the sulfides are converted into sulfates.