GB/T 5497-1985: Inspection of grain and oilseeds. Methods for determination of moisture content

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Scope

1.1 Instruments and utensils
1.1.1 Electric thermostat box;
1.1.2 Analytical balance: 0.001g;
1.1.3 Electric grinder or hand grinder for laboratory use;
1.1.4 Grain screening;
1.1.5 A desiccator equipped with color-changing silica gel (the color-changing silica gel cannot
be used once it turns red, and it shall be dried at 130°C ~140°C until it turns blue before use).
1.1.6 Aluminum box: inner diameter 4.5cm, height 2.0cm.
1.2 Preparation of specimen
Take a certain sample from the average sample; and prepare the specimen according to the
method specified in the table below.
W1 – weight of specimen and aluminum box before baking, in g;
W2 – weight of specimen and aluminum box after baking, in g.
When the moisture content of oilseed with shell is determined according to seed and shell
respectively, the moisture content of oilseed with shell shall be calculated according to Formula
(2):
Where:
M1 – moisture percentage of seed, in %;
M2 – moisture percentage of shell, in %;
A – percentage of total seed that can be obtained, in %.
The allowable difference of the double test results shall be no more than 0.2%; calculate the
average value, which is the measurement result. The measurement result retains the first digit
after the decimal point.
When other methods are used to measure the water content, the result compared with this
method shall not exceed 0.5%.

Basic Data

Standard ID	GB/T 5497-1985 (GB/T5497-1985)
Description (Translated English)	Inspection of grain and oilseeds. Methods for determination of moisture content
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	X10
Classification of International Standard	67.04
Word Count Estimation	3,329
Date of Issue	11/2/1985
Date of Implementation	7/1/1986
Issuing agency(ies)	National Bureau of Standards
Summary	This standard applies to the determination of commodity grain, oil water content.