标准值:
[Ag] ,[Al] ,[As] ,B ,Ba ,Be ,[Bi],
[Br] ,Ca ,Cd ,Ce ,[Cl] ,Co ,[Cr],
Cs ,Cu ,Dy ,Er ,Eu ,Fe ,Gd ,Ge,
[Hg] ,Ho ,K ,La ,Li ,[Lu] ,Mg,
Mn ,Mo ,[N] ,Na ,[Nb] ,Nd,
[Ni] ,P ,Pb ,Pr ,Rb ,S ,[Sb],
[Sc] ,Se ,[Si] ,Sm ,[Sn] ,Sr ,Tb,
[Th] ,[Ti] ,[Tl] ,Tm ,[U] ,[V] ,Y,
Yb ,Zn