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