例：测定含铁样品中wFe),比较结果的准确度 A.铁矿中，T=62.38%,x=62.32% Ea=x-T=-0.06% B.Li2C03试样中，T=0.042%,x=0.044% Ea=x-T=0.002% A.E,= ×100%=-0.06/62.38=-0.1% 入 B.Er= ×100%=0.002/0.042=5%4 例:测定含铁样品中w(Fe), 比较结果的准确度 A.铁矿中, T=62.38%, = 62.32% x Ea = x －T= －0.06% B. Li2CO3试样中, T=0.042%, =0.044% x Ea = x －T=0.002% a r A. 100% E E T =  =－0.06/62.38=－0.1% a r B. 100% E E T =  =0.002/0.042=5%