FOOD CHEMISTRY
BASIC PRINCIPLES OF CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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You should fully-filled the sample in the sample cups when preparing sample for water activity meter.
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True
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False
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Water activity is equal to equilibrium relative humidity divided by 100: (a w = ERH/100) where ERH is the equilibrium relative humidity (%).
Detailed explanation-2: -A water activity test works by placing a sample in a sealed measuring container. When the vapor pressure of the water in the substance and the water in the air reaches equilibrium, the relative humidity of the air surrounding the sample is equal to the water activity of the sample.
Detailed explanation-3: -There are three basic water activity measurement systems. These are Resistive Electrolytic Hygrometers (REH), Capacitance Hygrometers, and Dew Point Hygrometers (sometimes called chilled mirror).
There is 1 question to complete.