As soon as Pr and DBC is mixed in 0.24 mol/L HCl medium the reaction reaches equilibrium. While the half-life of the reaction of Er with DBC is 36 sec.

• 在0.；24mol/L HCl介质中Pr与DBC一混合反应即达到平衡；而铒与该试剂反应的半衰期为36秒。