chapter5determinationofmoisture内容摘要：
then water in samples is vaporized. The loss of weight is moisture content of samples. Applying range: There is no other volatile materials besides water. furthermore, the sample is stable when heating. For samples containing above 16% moisture Twostage drying method: A sample is first allowed to equilibrate with the air. A subsample is then ground for the determination of the remaining moisture. Vacuumoven methods Principle: water’s boiling point is decreased under vacuum. Applying range:： samples who are easily degenerative when heating above 100℃ , such as fruits, vegetables, syrup, etc. 2. Distillation methods Distillation with an immiscible solvent under a refluxingtype of condenser. The mixture of water a。阅读剩余 0%
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