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صنایع غذایی::
تعادل رطوبتی
relative humidity (ERH).
The ERH, of course, is determined by the water activity
The ERH remains important providing information on the relative humidity at
relative humidity (ERH) of products (Aw � 100 = ERH).
The ERH of a product is
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2
زمینشناسی و معدن::
رطوبت نسبی تعادلی
Unless the specimen is very small and is placed in a very large container, this establishment of equilibrium relative humidity (ERH) is not very taxing.
%), coated with PVD described above, and stored at 30% RH ^ ERH, would be completely effloresced wi ^ years.
It is also important that the ampoule be evacuated during the sealing process to prevent water driven off the heated part of the tube condensing on the specimen side of the closure point, since this could result in a change of conditions from hydrate transition ERH to minenU/solution ERH.
The ERH of a number of saturated salt solutions are given in Table 3.3.
In summary, the only acceptable means for the longterm preservation of minerals subject to humidity- related phase transitions are hermetic sealing at a higher-lower hydrate ERH, or by enforcing an RH within the specimen stability limits.
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