GB 5009.238-2016: National standard for food safety - Determination of water activity in foods

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Scope

This Standard specifies the Conway’s dish diffusion method and the water
activity meter diffusion method for determination of water activity in foods.
This Standard is applicable to the determination of water activity in pre-
packaged cereal products, meat products, aquatic products, bee products,
potato products, fruit products, vegetable products, milk powder and solid
drinks.
This Standard is not applicable to the frozen foods and foods containing volatile
ingredients.
Method I (Conway’s dish diffusion method) of this Standard applies to the water
activity in foods with a range of 0.00 to 0.98; while Method II (water activity
meter diffusion method) applies to the water activity in foods with a range of
0.60 to 0.90.
Method I Conway’s Dish Diffusion Method

Basic Data

Standard ID	GB 5009.238-2016 (GB5009.238-2016)
Description (Translated English)	National standard for food safety - Determination of water activity in foods
Sector / Industry	National Standard
Classification of Chinese Standard	X04
Word Count Estimation	9,924
Date of Issue	2016-08-31
Date of Implementation	2017-03-01
Older Standard (superseded by this standard)	SN 0180-1992; GB/T 23490-2009
Regulation (derived from)	Announcement of the State Administration of Public Health and Family Planning 2016 No.11
Issuing agency(ies)	National Health and Family Planning Commission of the People's Republic of China, State Food and Drug Administration