A.0.02%或0.04% B.0.01%或0.04% C.0.02%或0.1% D.0.02%或0.3%
A.0.02%或0.06% B.0.02%或0.04% C.0.02%或0.1% D.0.02%或0.08%
A.計算法 B.滴定法 C.失重法 D.蒸餾法