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【单选题】
某冻干制品进行剩余水分测定,剩余水分测定基本方法如下:抽样,称取称量瓶重量m1,将样品倒入称量瓶,称重m2,70摄氏度,烘干2小时;冷却30分钟,称重m3,70摄氏度,烘干2小时; 冷却30分钟,称重m4,70摄氏度,烘干2小时; 直到样品达到恒重mn(最后两次重量结果小于等于0.02g)。样品1的实验数据如下:1.5555g、5.5555、4.7766g、4.6666g、4.5555g。经过计算,样品1的水分含量应该是( )%。A.
5
B.
19
C.
25
D.
50
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