A.0.1mg/L B.0.2mg/L C.0.5mg/L D.1.0mg/L
A.0.1mg/L B.0.2mg/L C.0.05mg/L D.0.01mg/L
A.疊氮化鈉 B.氰化物 C.硫酸鈉 D.納氏試劑