Fig. 5. Spin–spin relaxation time (T2) values for -CD3 of d8–toluene and d2–dichloromethane in suspensions of the untreated soil fraction and the soil fraction treated with NaOH as a function of pH (1:200 soil to solution ratio, 0.01 M NaCl). 
-CD3 of d8–toluene for untreated soil; 
d2–dichloromethane for untreated soil; 
-CD3 of d8–toluene for treated soil.