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